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1381-based Solar Engine: Voltage-Controlled Solar Engine: Two simple
solar engine designs using a 1381* voltage discriminator. (added
11/05)
230 Volt AC Motor Controller: controls speed of230-Volt AC universal
motor, in PDF format, text in Finnish (Electronic circuit added 5/02)
4-transistor H-bridge: an interesting 4-transistor H-bridge variant;
this is cheap and easy to build, and best of all is "smokeless" (i.e., no
combination of inputs can cause bridge to self-destruct). (added
11/05)
555-based solar engine: Time-Controlled Solar Engine: a solar engine
design using a 555 timer IC (added 11/05)
6-transistor H-bridge: This is six transistor "Tilden style" H-bridge;
while not as old as original "basic H-bridge," this goes "way back," and is
basis for many BEAM driver circuits (added 11/05)
74*245-based motor driver: A simple, time-honored approach is to use one or
more 74*245 chips (normally 74AC245 is used for maximum current capability) to
provide motor drive current. Here, each channel of drive power is provided by one or
more buffer on chip. (added 11/05)
A miniature high-rate speed control: A miniature high-rate speed control
published in newsletter published by Electric Model Flyers' of Southwestern
Ontario (diagram add
A miniature low-rate speed control: A miniature low-rate speed control
published in newsletter published by Electric Model Flyers' of Southwestern
Ontario (diagram added 11/06)