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+ frequency counter. The schematic is fairly simple and straightforward and uses a PIC16F628A microcontroller for measuring frequency and a high speed comparator for signal amplification and conditioning. The microcontroller uses its internal 4MHz oscillator for the CPU clock. Timer1 ...

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100MHz frequency counter with PIC16F628A – LED Display

Couple of weeks ago I purchased from eBay one of these amazingly cheap an useful modules with MAX7219 LED driver and 8 digit LED display. It is ideal for frequency counter project. The problem was the absence of library for PIC microcontrolers. Luckily, I found a great library for Arduino and I reworked it to be compatible with PIC. The schematic of the frequency counter is actually almost the same as the p ...

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Single button code entry for a digital lock using PIC16F628A

The Button Code is a system that allows a single button to act as a keypad. The user enters a 4 digit code into the system using button taps. The button can be placed where the public can access it since like a keypad there are many combinations to keep guessers from activation the system. When the correct code is entered a form-C relay is activated (Normally Open and Normally Closed relay contacts). When a ...

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Breadboard module for PIC16F628A

Here’s another breadboard module that carries a PIC16F628A microcontroller. The power supply pins and the I/O ports of the PIC16F628A microcontroller are accessed through male headers. It can be easily plugged into a breadboard and is very useful for quick prototyping. It frees up a lot of space on the breadboard since the oscillator, reset, and ICSP circuits are already built on the module. It is different ...

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Enhanced 5/2-day Central Heating Programmer with serial computer interface using PIC16F628A

Overview This project has come about from my desire to control my home heating from work.  As I have a VPN between work and home a straightforward relay controlled from a PC would seem the easiest solution.  However I also wanted a control unit that I could operate in the house without resorting to the computer.  For example, I get up late and the heating is off, I just want to hit a button and turn it on.  ...

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Chronograph for Air Cannon using PIC16F628A microcontroller

Intro: Chronograph for Air Cannon This chronograph project consists of a sensor assembly and timer circuit box that can be used to measure the muzzle velocity of a projectile fired from an air cannon. I originally built this setup for use with a large air cannon with a 3" bore. The sensor assembly is attached to the end of the air cannon barrel. It contains infrared sensors used to detect the passage of the ...

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Very Accurate LC Meter based on PIC16F628A using pic microcontroller

Accurate LC Meter Part's List: 1x 16x2 LCD Display with Green / Blue Backlight 1x PIC16F628A Programmed Microcontroller 1x LM311 IC 1x Accurate LC Meter PCB with red solder mask 1x Enclosure 1x Gold Plated Machined 18 DIP IC Socket 1x Gold Plated Machined 8 DIP IC Socket 1x L/C Pushbutton Switch with Black Cap 1x Tactile momentary reset switch with Black Cap 1x Gold Plated 16-PIN LCD Female Header 1x Gold P ...

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Programmable watch with four character display using PIC16F628A microcontroller

Programmable watch with four character display You'll be the talk of the town when you wear this obnoxious, oversized, completely impractical wristwatch. Display your favourite foul language, song lyrics, prime numbers, etc. Inspired by the Microreader kit, I decided to make a giant watch using similar sixteen segment displays. Twelve hours later, I came out of my masochistic fugue and stopped trying to rou ...

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picLink RS232 low cost development controller with ADC using PIC16F628A

PicLink RS232 low cost development controller with ADC PICLink RS232 Embedded Controller The PICLink RS232 controller module affords any microcontroller enthusiast an easy to construct mini-microcontroller module. This embedded microcontroller is ICSP (in circuit serial) programmable and provides separate PORTA, PORTB, RS232 I/O ports, 4 Channel Analog to Digital converter as well as an integrated ICSP port ...

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Digital DCF77 clock with LCD and gong using PIC16F628A

Always the right time and date with DCF77 This project make use of a PIC16F628(A) and a DCF77 receiver from Conrad (Orderno. 64 11 38) Optional there is a possibility to connect an electronic gong on it. Click for information about DCF77 on the link underneath: The working from the DCF77 time signal Connect the output from the DCF77 module with PORTB.0 (pin 6). The pull-up resistor on the DCF77 output isn't ...

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