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Smoke: Dtector Schematic Diagram

Shows an electronic circuit diagram (schematic) for a simple 10 Watt audio amplifier, using only 4 transistors.
0 Comments - in Fun and Games
Schematic for an electronic circuit that behaves as an electronic version of a Roulette wheel. Flashed 10 LEDs in sequence with slowing pace until only 1 remains illuminated.
0 Comments - in Testing Tools
Complete instructions and circuit diagram for a Geiger counter meter device, which will allow you to measure radiation levels.
Alternative ultrasonic-whistle electronic circuit diagram schematic. Emits high pitch frequency in the 11-22 kHz range, which can be heard by dogs and other small insects.
PCB plans and circuit diagram (schematic) for what appears to be an extremely nice 100 watt guitar amplifier. Includes preamplifier and power amplifier circuit diagram and PCBs
Metal detectors a tons of fun. These metal detector electronic circuits will enable you to go hunting for all kinds of cool stuff, wherever you like!
Schematic / circuit diagram for a tunable transistor electronic organ. Easy to tune the notes that are generated.
Shows the pins and wiring instructions for creating an RS-232 Null Modem for your PC.
Schematics / circuit diagrams for a PLL 1 Watt FM radio transmitter that is enclosed in a casing. Oscillator, PLL circuits.