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Soldering: Controller Schematic Diagram

Shows an electronic circuit diagram (schematic) for a simple 10 Watt audio amplifier, using only 4 transistors.
Photo: Stepper Motor Controller Stepper Motor Controller
Preprinted Circuit Board with all the parts to assemble a controller that allows you to change directions, vary the speed, or single step the included stepper motor. Has LED's that flash when motor steps.
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.
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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
Photo: Soldering, Learn how to Solder Kit Soldering, Learn how to Solder Kit
This kit includes a 30W soldering iron and diagonal cutters. It is recommended as the starter kit to improve soldering skills. You will build a flashing European siren. Comes complete with speaker and light emitting diodes.
Photo: AC Motor Speed Controller AC Motor Speed Controller
This kit allows you to control the speed of an AC motor. It can provide high torque at even low speeds.
Photo: Encoded Stepper Motor Controller Encoded Stepper Motor Controller
This kit uses a Grey switch aka bit switch, to single step a unipolar stepper motor in either direction. Uses a
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.
Photo: Parallel Port Relay Board Parallel Port Relay Board
Use an old PC as a dedicated controller to turn on or off devices lab or radio shack. The circuit includes eight relays controlled with (included) software for either DOS or Windows 3.1. The kit is a boon to the Science Fair project, laboratory experiment
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.
Photo: Liquid Level Controller Liquid Level Controller
This circuit will allow you to control the level of a liquid. It switches a relay once the desired level is met.