New material is always being added. . . Visit regularly!

Browse the listing by circuit-type . . . -------------------------------------------------------------------- ¤AUDIO -------------------------------------------------------------------- Pre-amplifier [general purpose] Microphone transistors pre-amp Microphone op-amp pre-amp Microphone high gain amplifier Magnetic phono pre-amp to PC sound card LM 386 low power amplifier Super mixer Sound Blaster Audio equalizer Super(Mike)microphone Percussion generators PC Sound recording Control/Monitor ------------------------------------------------------------------------- ¤ ALARMS ------------------------------------------------------------------------- Instrument"ON" Alarm monitor Car pseudo alarm Alarm timer Alarm FM transmitter design Alarm design with CMOS4001 Tone generators(CMOS) ------------------------------------------------------------------------ ¤ OSCILLATORS ------------------------------------------------------------------------- Cycling a relay Sine wave generators Square waves generators Logic clocks Lamp flaher Cheapo Oscillator ------------------------------------------------------------------------ ¤ FILTERS ------------------------------------------------------------------------ 60 (HUM) Hertz notch filters Adjustable Notch filters ----------------------------------------------------------------------- ¤ RF ------------------------------------------------------------------------ RF Detector Microphone FM transmitter Radio/TV FM transmitter FM Receiver with TDA7000 IC LM567 Frequency detector One Transistor Circuits ------------------------------------------------------------------------ ¤ INSTRUMENTS ------------------------------------------------------------------------ PCB tester Signal functions generator SCR tester Transistors Go-no-Go tester Transistor audible tester DC voltage, continuity checkers Voltage detector switch Battery low voltage monitor Frequency to Voltage converter using the LM331 Multi-Trace scope display Power supply ------------------------------------------------------------------------- ¤ REMOTE CONTROLS ------------------------------------------------------------------------- Photo transistor relay -------------------------------------------------------------------------- ¤ Light Emitting Diodes ( LED ) -------------------------------------------------------------------------- Using LEDs 4017 Counter and LEDs Flashing Arrow LED flashers ------------------------------------------------------------------------- ¤ DC VOLTAGE -------------------------------------------------------------------------- Pos. to Neg. converter Voltage doubler. converter DC-DC converter Fuse or line monitor Metering a power supply -------------------------------------------------------------------------- ¤ MISCELLANEOUS -------------------------------------------------------------------------- Jeopardy descriminator Motor controls HD battery charger Using diodes and zeners Count down timer Some useful circuits Applications with CMOS4001 Switch Debouncer Basic logical truth data Electronic switching ¤ END OF LISTING
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