HOLA HOLAY

18 PIN PIC Development Board

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<a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC.jpg" rel="lightbox"><img alt="18PIN PIC Development Board PIC" class="aligncenter size-full wp-image-45069" height="500" sizes="(max-width: 500px) 100vw, 500px" src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC-150x150.jpg 150w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC-300x300.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC-75x75.jpg 75w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC.jpg 500w" width="500" /></a><br />
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The PIC 18 PIN (DIP) Development / Evaluations Board demonstrates the capabilities of Microchip’s 8-bit microcontrollers, specifically, 18 Pin PIC16F1847. It can be used as a standalone demonstration board with a programmed part. With this board you can develop and prototype with all Microchip’s 18 PIN PIC microcontrollers. The board has a Reset switch and status LEDs. On board 3.3 V and 5V DC regulators allows using 3V and 5V PICs, This board support both 3.3V low power and normal 5V operation. All I/O Pins out with 2xfemale headers<br />
<h3>
Development Board Features:</h3>
<ul>
<li>    16 I/O Ports</li>
<li>    Onboard 5V and 3.3V Supply</li>
<li>    3.3V or 5V Supply selection by jumper</li>
<li>    Dual line I/O</li>
<li>    On board Power Indication</li>
<li>    On-board ICSP Port (PICKIT2 Standard Programming Port)</li>
<li>    Well labeled legends</li>
<li>    All outputs has provision for LEDs for output indication</li>
<li>    Replaceable PIC Microcontroller,</li>
<li>    Crystal and capacitor mounting under the PCB</li>
</ul>
<h3>
PIC16F1847 Micro-Controller Specifications:</h3>
<ul>
<li>Enhanced Mid-range Core with 49 Instruction, 16 Stack Levels</li>
<li>Flash Program Memory with self read/write capability</li>
<li>Internal 32MHz oscillator</li>
<li>Integrated Capacitive mTouch Sensing Module</li>
<li>Data Signal Modulator Module</li>
<li>MI2C, SPI, EUSART w/auto baud</li>
<li>2 ECCP & 2 CCP (Enhanced/Capture Compare PWM)</li>
<li>Comparators with selectable Voltage Reference</li>
<li>12 Channel 10b ADC with Voltage Reference</li>
<li>25mA Source/Sink current I/O</li>
<li>Four 8-bit Timers (TMR0/TMR2/TMR4/TMR6)</li>
<li>One 16-bit Timer (TMR1)</li>
<li>Extended Watchdog Timer (EWDT)</li>
<li>Enhanced Power-On/Off-Reset</li>
<li>Brown-Out Reset (BOR)</li>
<li>In Circuit Serial Programming (ICSP)</li>
<li>On Board In-Circuit Debug</li>
<li>Wide Operating Voltage (1.8V – 5.5V)</li>
<li>Low Power PIC16LF182x/4x variants (1.8V – 3.6V)</li>
<li>Standby Current (PIC16LF1847): 30 nA @ 1.8V, typical</li>
<li>Program Memory Type Flash</li>
<li>Program Memory (KB) 14</li>
<li>CPU Speed (MIPS) 8</li>
<li>RAM Bytes 1,024</li>
<li>Data EEPROM (bytes) 256</li>
<li>Digital Communication Peripherals 1-UART, 1-A/E/USART, 2-SPI, 2-I2C2-MSSP(SPI/I2C)</li>
<li>Capture/Compare/PWM Peripherals 2 CCP, 2 ECCP</li>
<li>Timers’ 4 x 8-bit, 1 x 16-bit</li>
<li>ADC 12 ch, 10-bit</li>
<li>Comparators 2</li>
<li>Temperature Range (C) -40 to 125</li>
<li>Operating Voltage Range (V)1.8 to 5.5</li>
<li>Pin Count 18</li>
<li>XLP Yes</li>
<li>Cap Touch Channels 12</li>
</ul>
<h3>
Schematic</h3>
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<a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-Schematic-1024x680.jpg" rel="lightbox"><img alt="SCHEMATIC1 : PAGE1" class="aligncenter size-large wp-image-45070" height="401" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-Schematic-1024x680.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-Schematic-300x199.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-Schematic-1024x680.jpg 1024w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-Schematic.jpg 1200w" width="604" /></a><br />
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<h3>
Pinout</h3>
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/pinout.png" rel="lightbox"><img alt="pinout" class="aligncenter size-full wp-image-45071" height="571" sizes="(max-width: 629px) 100vw, 629px" src="http://www.electronics-lab.com/wp-content/uploads/2015/09/pinout.png" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/09/pinout-300x272.png 300w, http://www.electronics-lab.com/wp-content/uploads/2015/09/pinout-150x136.png 150w, http://www.electronics-lab.com/wp-content/uploads/2015/09/pinout.png 629w" width="629" /></a><br />
<h3>
Photos</h3>
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC2.jpg" rel="lightbox"><img alt="18PIN PIC Development Board PIC2" class="aligncenter size-full wp-image-45073" height="500" sizes="(max-width: 500px) 100vw, 500px" src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC2.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC2-150x150.jpg 150w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC2-300x300.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC2-75x75.jpg 75w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC2.jpg 500w" width="500" /></a><br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC3.jpg" rel="lightbox"><img alt="18PIN PIC Development Board PIC3" class="aligncenter size-large wp-image-45074" height="500" sizes="(max-width: 500px) 100vw, 500px" src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC3.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC3-150x150.jpg 150w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC3-300x300.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC3-75x75.jpg 75w, http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-Development-Board-PIC3.jpg 500w" width="500" /></a></div>
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PCB </h2>
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<a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18-PIN-PIC-Board-PCB_layout.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18-PIN-PIC-Board-PCB_layout.png" style="height: 250px; width: 240.972px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18-PIN-PIC-Board-PCB_top.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18-PIN-PIC-Board-PCB_top.png" style="height: 250px; width: 240.278px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18-PIN-PIC-Board-PCB_bottom.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/09/18-PIN-PIC-Board-PCB_bottom.png" style="height: 250px; width: 239.583px;" /></a>                            </div>
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                                            <li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/09/18PIN-PIC-TWOVOLT.pdf" target="_blank">18PIN-PIC-TWOVOLT.pdf<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/pdf-d-icon.png"></a></li>

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18 PIN PIC Development Board

The PIC 18 PIN (DIP) Development / Evaluations Board demonstrates the capabilities of Microchip’s 8-bit microcontrollers, specificall...

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USB PIC Programmer

Unknown 0 07:43

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<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2015-1024x768.jpg" rel="lightbox"><img alt="DSCF2015" class="aligncenter size-large wp-image-45435" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2015-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2015-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2015-1024x768.jpg 1024w" width="604" /></a><br />
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This page is dedicated to everybody needs to program a PIC (Microchip) device via USB port. Looking on the web for ready-to-use  projects, I found a good one called Open Programmer, coming with several schematics, PCBs and Open Source code. The original link is <a href="http://openprog.altervista.org/OP_ita.html">http://openprog.altervista.org/OP_ita.html</a><br />
What concerned me was the need to mount, on the mainboard, a specific socket board depending on the model of PIC being programmed. Moreover, the proposed layout did not meet my personal “compact look” ideas. So, I propose hereafter a small layout version of that circuit, adopting a single smart on-board ZIF socket. This version sacrifices many non-PIC microcontroller models. I will thank everybody proposing a larger range implementation, suitable to program Atmel and other devices. Anyway, if your goal is to program PIC devices, you are on the good site.<br />
A small box, a USB connector, a ZIF socket, two leds. That’all in my compact proposal.<br />
<h3>
Description</h3>
The details are available on the original project mentionned above. Hereafter, I shown my Compact version, with a schematic, PCB layout and instruction for assemby and inserting it in a very common little plastic box. At the bottom of this page, I supply a copy of the program to load on the PIC18F2550 used to manage the programming functions, as well as a copy of the PC side program. I tested the program up to Win-8 without problems. Take into account that, on the original site, a newer version of both Firmware and Software is available.<br />
<h3>
Schematic</h3>
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/schematic-e1444647329431.png" rel="lightbox"><img alt="schematic" class="aligncenter size-full wp-image-45422" height="411" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/schematic-e1444647329431.png" width="750" /></a><br />
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<h3>
Realisation and assembly</h3>
Build first the main module using low profile components being under 10 mm of height from the PCB surface, since a second board will be mounted over that one. Mount 4 ten millimeters height columns to allow the final assembly of the second board. Use low profiles parts to fix the columns, otherwise some manual metals removal can be needed to reduce the occupation on the copper side.<br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2011-1024x768.jpg" rel="lightbox"><img alt="DSCF2011" class="aligncenter size-large wp-image-45427" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2011-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2011-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2011-1024x768.jpg 1024w" width="604" /></a><br />
The ZIF is a quite delicate component befor final soldering. Pay attention to avoid any force that can lead to damage or deformation.  It is better to do 1.2 mm holes to facilitate the insertion of the ZIF socket in the PCB. During soldering jump several pins each time,  following a spiral line, adopting a sequence that allow to warm-down a pin while you are soldering the next one.<br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2012-1024x768.jpg" rel="lightbox"><img alt="DSCF2012" class="aligncenter size-large wp-image-45428" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2012-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2012-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2012-1024x768.jpg 1024w" width="604" /></a><br />
Once the two circuits are ready, connect them using the strip lines, and block assembly using the columns. Use countersunk screws of countersunk holes to avoid the screws being too hight respect to upper surface of second PCB. Just the socket and the two leds shall emerge.<br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2014-1024x768.jpg" rel="lightbox"><img alt="DSCF2014" class="aligncenter size-large wp-image-45429" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2014-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2014-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2014-1024x768.jpg 1024w" width="604" /></a><br />
The plastic box is very common. You shall create holes to let emergent parts to exit from its surface: the socket, the two leds (or a single bi-colour led), the USB socket on a short side. It is a A-type female<br />
<h3>
The Box</h3>
After a few attempts and corrections you will reach the final result. The cover has a border that shall be modified to host the circuits, but your logic will drive you. The first PCB has to be fixed on the box using the supplied screws.<br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2013-1024x768.jpg" rel="lightbox"><img alt="DSCF2013" class="aligncenter size-large wp-image-45430" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2013-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2013-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2013-1024x768.jpg 1024w" width="604" /></a><br />
Hereafter the final result:<br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2016-1024x768.jpg" rel="lightbox"><img alt="DSCF2016" class="aligncenter size-large wp-image-45431" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2016-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2016-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/10/DSCF2016-1024x768.jpg 1024w" width="604" /></a><br />
<h3>
Software</h3>
As said before, the original site offers both the firmware and the PC side software. Anyway, to start using this programmer, I suggest you to use the versions I used at time of project editing, available hereafter for downloading. After some tests, you can try the new updated versions available on the original site. Of course, if you have not a programmer yet, a friend should program the programmer first, for you. After that first step, you will be automous!<br />
You can download the PC software on the link below – OpenProg.rar<br />
You can download the PIC .hex file on the link below – OProg.hex<br />
<h3>
Usage</h3>
Connect the programmer to the PC with a male-male A-Type USB cable. The device is seen as a generic one. The green led blinks speedy first, announcing the connection in progress. Than slowly, indicating that the connection phase is completed. The PC software allows bot writing and reading the EEPROM of any PIC mounted on the ZIF socked. The test functions allow to measure the Vpp high voltage generated by the step-up converter present on the main circuit. That voltage is anyway already verified by the firware itself.<br />
The PIC to be programmed has to be positionned on the ZIF socket as shown by the following picture. An hi-res version of this picture is available<a href="http://www.purchiaroni.com/progetti/UsbPicProg/Etichetta.jpg" rel="lightbox[45421]"> HERE</a> for being printed and attached on the back of the programmer itself.<br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/Etichetta-e1444647915988.jpg" rel="lightbox"><img alt="Etichetta" class="aligncenter size-full wp-image-45434" height="396" src="http://www.electronics-lab.com/wp-content/uploads/2015/10/Etichetta-e1444647915988.jpg" width="750" /></a><br />
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PCB </h2>
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<a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_top1.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_top1.png" style="height: 214.665px; width: 366px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_top2.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_top2.png" style="height: 210.553px; width: 366px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_bottom1.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_bottom1.png" style="height: 229.582px; width: 366px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_bottom2.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/10/pcb_bottom2.png" style="height: 225.605px; width: 366px;" /></a>                            </div>
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                                <h2 class="title-sub-inner">Download</h2>

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                                            <li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/OpenProg.rar" target="_blank">OpenProg.rar<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/rar.png"></a></li>

<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/OProg.hex" target="_blank">OProg.hex<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/rar.png"></a></li>

<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/SpuProg_SCH.pdf" target="_blank">SpuProg_SCH.pdf<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/pdf-d-icon.png"></a></li>

<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/SpuProg_LAY.pdf" target="_blank">SpuProg_LAY.pdf<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/pdf-d-icon.png"></a></li>

<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/10/SpuProg_PCB.pdf" target="_blank">SpuProg_PCB.pdf<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/pdf-d-icon.png"></a></li>

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USB PIC Programmer

This page is dedicated to everybody needs to program a PIC (Microchip) device via USB port. Looking on the web for ready-to-use proj...

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100MHz frequency counter with PIC16F628A – LCD Display

Unknown 0 07:41

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<h3>
Photos</h3>
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD2-1024x826.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,2)" class="aligncenter size-large wp-image-46247" height="487" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD2-1024x826.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD2-300x242.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD2-1024x826.jpg 1024w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD2-150x121.jpg 150w" width="604" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD2.jpg" rel="lightbox[46244]"><br />
</a> <a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD3-1024x781.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,3)" class="aligncenter size-large wp-image-46248" height="461" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD3-1024x781.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD3-300x229.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD3-1024x781.jpg 1024w" width="604" /></a><br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD4-1024x650.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,4)" class="aligncenter size-large wp-image-46249" height="383" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD4-1024x650.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD4-300x190.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD4-1024x650.jpg 1024w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD4-150x95.jpg 150w" width="604" /></a><br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD5-1024x645.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,5)" class="aligncenter size-large wp-image-46250" height="380" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD5-1024x645.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD5-300x189.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD5-1024x645.jpg 1024w" width="604" /></a><br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD6-1024x754.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,6)" class="aligncenter size-large wp-image-46251" height="445" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD6-1024x754.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD6-300x221.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD6-1024x754.jpg 1024w" width="604" /></a><br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD7-1024x763.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,7)" class="aligncenter size-large wp-image-46252" height="450" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD7-1024x763.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD7-300x223.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD7-1024x763.jpg 1024w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD7-150x112.jpg 150w" width="604" /></a><br />
<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD8-1024x768.jpg" rel="lightbox"><img alt="FreqCounter(16F628A,LCD,8)" class="aligncenter size-large wp-image-46253" height="453" sizes="(max-width: 604px) 100vw, 604px" src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD8-1024x768.jpg" srcset="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD8-300x225.jpg 300w, http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD8-1024x768.jpg 1024w" width="604" /></a><br />
<h3>
References:</h3>
<ul>
<li><a href="http://mcs.uwsuper.edu/sb/Electronics/FreqCounter/">http://mcs.uwsuper.edu/sb/Electronics/FreqCounter/</a></li>
<li><a href="http://www.moty22.co.uk/lcd_counter.php">http://www.moty22.co.uk/lcd_counter.php</a></li>
</ul>
<h3>
PDF datasheets:</h3>
<ul>
<li>AP2530GY: <a href="http://www.a-power.com.tw/files/AP_ProductData/PD_File/AP2530GY-HF.pdf">http://www.a-power.com.tw/files/AP_ProductData/PD_File/AP2530GY-HF.pdf</a></li>
<li>TLV3501: <a href="http://www.ti.com/lit/gpn/tlv3501">http://www.ti.com/lit/gpn/tlv3501</a></li>
</ul>
<br />
<ul>
</ul>
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<a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_top_layout.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_top_layout.png" style="height: 154.927px; width: 366px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_bottom_layout.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_bottom_layout.png" style="height: 184.014px; width: 366px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_bottom_pcb.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_bottom_pcb.png" style="height: 182.442px; width: 366px;" /></a><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_bottom_pcb_mirrored.png" rel="lightbox"><img src="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_bottom_pcb_mirrored.png" style="height: 182.174px; width: 366px;" /></a>                            </div>
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<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD_eagle_files.zip" target="_blank">FreqCounter16F628ALCD_eagle_files.zip<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/rar.png" /></a></li>
<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCD_PCB_PDF.zip" target="_blank">FreqCounter16F628ALCD_PCB_PDF.zip<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/rar.png" /></a></li>
<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter16F628ALCDschematic.pdf" target="_blank">FreqCounter16F628ALCDschematic.pdf<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/pdf-d-icon.png" /></a></li>
<li><a href="http://www.electronics-lab.com/wp-content/uploads/2015/11/FreqCounter_Source_Code.rar" target="_blank">FreqCounter_Source_Code.rar<img src="http://www.electronics-lab.com/wp-content/themes/electronicslab/images/rar.png" /></a></li>
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100MHz frequency counter with PIC16F628A – LCD Display

This project shows how to build a very simple yet very useful tool that every DIY enthusiast should have in his lab: a 100MHz+ frequ...

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2 Digit 99 Seconds Timer

Unknown 0 07:37

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2 Digit Count Down Timer is a utility Count Down timer project for upto 99 seconds of countdown time.  This project can find many uses in your shack and home.  The relay output remains on during the Count Down period, allowing you to interface load or alarm that you want to keep it on for a certain amount of time (in seconds).<br />
<h3>
Specifications</h3>
<ul>
<li>Microcontroller based design for greater accuracy and control</li>
<li>Power supply input 12 VDC 200 mA</li>
<li>Two 0.5″ display segments to display time</li>
<li>12V SPDT (Single Pole Double Throw) relay for alarm use</li>
<li>Single key start and dual key alarm time set function</li>
<li>Power and Relay-On LED indicator</li>
<li>Terminal connectors for connecting power supply input and relay output to the PCB</li>
<li>Onboard regulator for regulated supply to the kit</li>
<li>Crystal resonator based design for better accuracy</li>
<li>PCB dimensions 72 mm x 81 mm</li>
</ul>
This is a microcontroller based 2 Digit (99 Seconds) Count Down Timer.  This Count Down Timer is very easy to use and easy to configure.  This project can find a lot of application areas where you need a device to remain ON (or OFF) for a certain period of time (upto 99 Seconds).  Power to the circuit is applied at CN1 (12 VDC).  D1 provides the reverse polarity protection to this kit.  LED D2 confirms DC Power Supply to the board.  S1 and S2 displays Count Down time.  J3 provide an easy way of connecting external switches to this board.  LED D4 confirms the relay status.<br />
<h3>
Operating Instructions:</h3>
The setting up of countdown period and START Function for this kit is accomplished with the help of 3 tactile switches shown as SW1, SW2 and SW3 in the schematic and labeled as UP, DOWN and SET on the PCB respectively.<br />
<ol>
<li>Setting Time : The default value is shown on display S1 and S2 respectively. You can change this value by simply pressing the UP and DOWN key.</li>
<li>Start : You can start the Count Down by pressing SET key. When the Count Down starts the relay is energized, indicated with the glow of LED D4. Once the Display (S1 and S2) reaches 0 the relay is de energized.</li>
</ol>
<h3>
Schematic</h3>
<a href="http://www.electronics-lab.com/wp-content/uploads/2016/01/99_SECONDS_TIMER_SCH.png" rel="lightbox"><img alt="99_SECONDS_TIMER_SCH" class="aligncenter size-full wp-image-46822" height="554" sizes="(max-width: 737px) 100vw, 737px" src="http://www.electronics-lab.com/wp-content/uploads/2016/01/99_SECONDS_TIMER_SCH.png" srcset="http://www.electronics-lab.com/wp-content/uploads/2016/01/99_SECONDS_TIMER_SCH-300x226.png 300w, http://www.electronics-lab.com/wp-content/uploads/2016/01/99_SECONDS_TIMER_SCH-150x113.png 150w, http://www.electronics-lab.com/wp-content/uploads/2016/01/99_SECONDS_TIMER_SCH.png 737w" width="737" /></a><br />
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2 Digit 99 Seconds Timer

2 Digit Count Down Timer is a utility Count Down timer project for upto 99 seconds of countdown time. This project can find many uses...

Plus d'infos »