Project description:
This is a very small program to try the Sharp GP2Y0D340K infrared object detector.

Electronics used:
Sharp GP2Y0D340K

Link: Object Detector

Project description:
This is a sound playback system for a PIC or any other microcontroller. It uses a clever encoding system to mathematically model the actual performance of the RC filter when the signal is encoded. This allows playback of good quality sound with the absolute minimum software and hardware. The RC filter modeling (encoding algorithm) has been refined to be PIC friendly in binary math, giving the ability to playback AND RECORD in real time even on a PIC, even with high rates up to 150+ kbit/sec.

Electronics used:
LM741
Link: A system to record and/or play sound in a bit stream format

Project description:
The Devantech SFR04 Ultrasonic Range Finder indicates the distance to the closest object within range. Echo’s that arrive later are received and processed, but subsequently ignored. For a true radar all signals should be taken into account.

Electronics used:
Devantech SFR04

Link: Ultrasonic Radar, PIC16F877

Project description:
Climate Controller. This controller uses the Sensirion SHT11 combined temperature and humidity sensor. Measurement and Display:
Scale selectable between Centigrade and Fahrenheit
Humidity 0 - 100% temperature compensated
Temperature -40 to 123° C (-40 to- 254° F)

Electronics used:
SHT11

Link: Climate Controller, PIC16F873

Project description:
I recently had to make a guitar amplifier and thought it would be cool to include a PIC based guitar tuner.  I had an AIWA 3-disc stereo lying around with a non-functioning CD player.  The tuner and tape deck still worked fine, and  it was rated for I think 30 watts/channel.

Electronics used:
AD620
LM10

Link: PIC based guitar tuner and preamp

Project description:
These tubes were originally in a Wang desktop calculator, manufactured in 1969.  A PIC16F73 is the only IC used, although it was a stretch with all 22 IO being used. The timing reference is obtained from the 60 HZ AC line, although during a power outtage a 9 volt NiCad keeps the CPU powered and the timing is generated by an interrupt routine (10 MHZ clock crystal).  A 5 pin header on the main circuit board is used for ISP and allowed for easy debugging.

Link: Nixie clock, PIC16F73

Project description:
This project is based on ideas from Rickard’s electronic projects page and David B. Thomas VCR Pong. However, I have developed the simplicity even further, eliminating most of the external components. Using microcontrollers with internal 4MHz clock generator there is no need for the xtal. The 12f675 part also operates on wide voltage range, and the regulator can be removed. For game controller, I plan on using the old Commodore 64 style paddless. They include firing buttons, which I plan on using as power switch and game reset. 16F675 has a low power sleep mode with 1nA current consumption, so I plan on using that to switch off.

Link: 8-PIN PONG

Project description:
I needed a way to automatically control the main heating of our house. The basic idea is to start the heating at a certain time in the morning, and to switch it off at night. The switching points are different on various weekdays.

Link: DCF controlled time switch

Project description:
This one is using a 16F876 PIC, MCP1047A temperature sensor ( X2 ), MCP1541 voltage reference and MCP6022A opamp. The display is a 2 row HD74780 based 2X16 char, SII L1652BIJ2 but any other display based on HD74780 can be used.

Electronics used:
MCP1047A
MCP6022A
MCP1541
HD74780
Link: Dual Thermometer with serial output

Project description:
Some time ago I use to create an “Internet Plug” - it was useful except one aspect - no password protection was available for the Site Player. In order to solve this problem I have attached a 16F877 processor to the Site Player. Now the Internet Plug is Password Protected and also the status of the exits is saved in EEPROM so is not lost in case of a power failure. One of the simplest applications will be to control the lights from the distance, meaning from any computer connected to the Internet.

Electronics used:
SitePlayer Moule

Link: The Internet Plug II