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Video title generator – Circuit Schematic
Video title generator
Want to add video to your next project? This device uses a PIC16F819 and not much else. Getting 20 characters to a line is possible by using the SPI port to gen...
Talking Frog Box using PIC16F870 – Circuit Schematic
Talking Frog Box using PIC16F870
This device 'listens' to a conversations and then interjects words and phrases at inappropriate times. I got this box at a local thrift store for $1.50 (special...
A Talking Fish using PIC16F819 – Circuit Schematic
A Talking Fish using PIC16F819
These items were sold nationally several years ago. The fish would sing, open its mouth, turn its head, and flap its tail. After removing the back panel, all of...
Furby robot using PIC16F819 – Circuit Schematic
Furby robot using PIC16F819
There are several websites documenting the original Furby circuit board. I decided to replace the original circuit entirely and replace it with a PIC based con...
Capacitor discharge ignition system ( PIC 16F615 ) – Circuit Schematic
Capacitor discharge ignition system ( PIC 16F615 )
This device uses a PIC12F615 to implement a capacitor discharge ignition system. When the switch (button) is closed, the PIC sends pulses to the IRF644 MosFet c...
Color organ with PIC16F84 – Circuit Schematic
Color organ with PIC16F84
Flash-back to the 60's with this 5 channel unit with up to 100 watts per channel. This unit uses a PIC16F84 with an 8 bit A/D. The signal from both stereo chan...
Analogue / Digital Logger I – Circuit Schematic
Analogue / Digital Logger I
Intermittent failures in electronic systems are some of most difficult to diagnose. This device is designed to run for days at a time looking for a failure and...
Video Switcher with PIC16F819 – Circuit Schematic
Video Switcher with PIC16F819
This device uses the second method (which, if you don't already know, requires about 100 times less parts), but adds motion detection to switch cameras. The usu...
Rotating Message board using PIC12F629 – Circuit Schematic
Rotating Message board using PIC12F629
A simple rotating display. Just spin and enjoy. While the "Air display" is rotating, it writes the message on the air. Because the "persistence of the vision", ...
LCD digital Clock using PIC16F628 – Circuit Schematic
LCD digital Clock using PIC16F628
The reason why I'm using a LCD display is because it allow me to display many characters and it doesn't need to be "refreshed" as 7-segment Led displays. Also, ...
Led Clock using PIC16F84 – Circuit Schematic
Led Clock using PIC16F84
Using only 2 capacitors, 3 resistors, 4 seven-segment Display, 1 xtal, 2 switches n.o. and 1 Microcontroller PIC, you can build this Digital Led Clock. you can ...
ON/OFF button using Microcontrollers – Circuit Schematic
ON/OFF button using Microcontrollers
Using a switch to power up your microcontroller projects may not be a good idea if you need to "wake" the PIC during some events. For example: A metal detector ...
Security Lock with keypad and LCD (PIC16F84A) – Circuit Schematic
Security Lock with keypad and LCD (PIC16F84A)
Finally I was able to control an LCD Hitachi display and a 12-key matrix keypad with only one 16F84 or 16F628. In a near future, I will be able to control a ful...
PIC16F628 as digital Tachometer – Circuit Schematic
PIC16F628 as digital Tachometer
Pin 3 defines the Display type: Common Cathode or Common Anode. Connect this pin to GROUND if you are using common cathode 7-segment led displays. To use common...
Water Level control and monitor with PIC12F675 – Circuit Schematic
Water Level control and monitor with PIC12F675
I found some similar circuits but aren't good enough for me. Some circuits measure the water's resistance to determine the level. That is dangerous for drinking...
68HC11 as a Digital Timer – Circuit Schematic
68HC11 as a Digital Timer
The timer is proposed an effective model for controlling an external load 8A/380V. Equipped with a 68HC11 mu.P associated with an 8 MHz crystal, it can get very...
RC transmitter with MC68HC711 – Circuit Schematic
RC transmitter with MC68HC711
The first SUPERTEF version was using a 68HC11 microprocessor in extended mode i.e. with an external memory program which necessitated many integrated circuits (...
serial LCD interface for PIC – Circuit Schematic
serial LCD interface for PIC
If you are developing applications for the PIC mcu, and miss debugging tools, or don't have enough I/O pins for a parallel LCD interface in your design, this se...
Greenhouse irrigation controller ( PIC16F84 ) – Circuit Schematic
Greenhouse irrigation controller ( PIC16F84 )
This is a simple one-valve irrigation controller made for our greenhouse. The code contains a software real-time clock (RTC) and a multiplexed 8-digit LED displ...
Digital LCD thermometer ( PIC16F871 ) – Circuit Schematic
Digital LCD thermometer ( PIC16F871 )
The circuit drives the LCD pins with 50% square waves. Each segment on this LCD is connected to the COM backplane and a separate pin. When a pin is driven in ph...