The servo testers which can be found in shops are quite expensive and the shematics published here and there do not achieve the requested precision. Most of the time they are based on the famous NE555 timer IC and are limited to one function. The use of a PIC (here 16F84 or 16F628) gives the [...]

This project DoorBell was created by Quozl . He used microcontroller PIC 16F84. A microcontroller driven doorbell circuit with features: one second instant pulse output, one second delayed pulse output, two minute lighting output, latching has been triggered indicator, processor alive indicator, ignore additional trigger for preset duration. Source: Quozl

Rickard have designed the hardware of the PIC video game system to be able to run several different kinds of games. It has two standard C64/Amiga/Atari joysticks and video and audio output. The processor is a PIC16F84 running at 12MHz and generates both video (PAL and NTSC) and audio in software.  The hardware design is [...]

Yet another darkroom timer using a PIC 16F84A. All the functions are in firmware: Lamp(s) light at start of timing and turn off when timer reaches zero. A set of leds were added between the minute and second leds which blink during timer operation. 7 segment displays include tails for digits 6 and 9. A [...]

The light level can be adjusted with two push-buttons “Up” and “Down”. Controller in this application is PIC16F84 that drives BUZ11 mosfet. Dimmer is tested with a light bulb 12V/4W and mosftet didn’t get even warm (which was expected since the datasheet says: 50V/30A). Source: Elektronika.ba (niho) Forum post: Digital light dimmer

From the displayed patterns can be seen that the relays connected to the RB ports on the microcontroller and the RB3 – RB6.  Over MAX232 interface circuit is connected to the serial port of your PC. Command is done the program done in Visual Basic in the PC. Led6 uses LEDs for indication of incorrectly [...]

From the displayed patterns can be seen that the relays connected to the RB ports on the microcontroller and the RB0 – RB3. As the use TSOP1736 IR receiver or similar to it. Leadership is done remote control that supports the Philips RC5 standard. Source: Milan Milovanovic

Introduction When I set, some time ago, about working with a PIC 16×84, I had immediately to face the problem to have a permanently and stably working circuit, without mounting the PIC on a prototype board every time. Searching on the net, I didn’t find anything really complete for a PIC 16F84 / 16C84; I [...]

The purpose of this timer is to provide a countdown time from 1 second to 99 minutes & 59 seconds. I use it to control the lighting for the Ultra-Violet exposure of photosensitive PCB material. The project provides also an audible alarm at the end of the countdown time and switches the UV lights by [...]

GSM call alarm is a device that will call a destination number via Siemens or Ericsson GSM phone (19200 bps RS232). It has 1 sensor input and another input – state (stanje). If state input is = 0V than the device is “active” and it monitors the sensor input. The device is deactivated when state [...]

Download Project: Led Show with PIC16F84A