10 Mhz Frequency Counter
A Site For Electronic Hobbyists.
New material is always being added. . .
Visit regularly!
timer,page 7,8
1. (a) Pre-amplifiers (b) DC checkers (c) Gimmicks 2. (a)Microphone Pre-amplifiers (b)Microphone Amplifier
3. FM Transmitters 4. (a) Cycling a relay (b) Transistor tester
5. Equipment "ON" Alarm Monitor 6. (a) Switch Debouncer (b) Pos to Neg Converter , Voltage Doubler
7. Alarm Timer 8. (a) Countdown Timer
9. 60 HZ (Hum) Filters 10. (a) LM386 Amp (b) Voltage Monitors
11. Portable Power Supply 12. (a) Phono Pre-amp to Sound card
13. Signal function generator 14. Car Pseudo Alarm project
15. (a) PC Board Tester (b) RF Detector 16. Percussion Generators
17. Alarm FM Transmitter design , FM Receiver 18. Alarm design with CD4001
19. (a) Sound Blaster (b) Audio Equalizer 20. Metering a Power Supply
21. Some useful circuits 22. Jeopardy Discriminator
23. Oscillators ,Logic Clocks , LED Flashers, Cheapo Oscillator 24. Applications with CMOS CD4001
25. Fuse or Line Monitor 26. Super Mixer / Microphone with Pre-amp
27. Motor Controls , Battery Charger 28 . Super Mike
29. One transistor circuits 30 . Using Diodes and Zeners
31. Using LEDs 32. PC Sound recording Control/Monitor
33. Multi-Trace Scope Display 34 . Fun with the 4017 CMOS IC ,LEDs and Sound
35. Sequential Flashing Arrow 36. Bench Power Supply
Schematic designs for this site where made
using Windraft from Ivex Design International.
AND

Laurier Gendron, Burnaby, B.C., Canada. 1999-2002