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Propeller clock a few light emitting diodes spin, precisely controlled by a PIC microprocessor, giving the illusion of a larger array.
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Stirling Prayer Engine built with simple parts and runs from the heat of a votive candle.
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H-Bridge drives DC motors forward and backward.
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Servo Pulse to PWM converter connects an H-Bridge to radio control receivers or robotic circuits.
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Servo Pulse to Dual H-Bridge interface performs vital control functions needed for propulsion and steering of a “fighting robot”.
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PIC Programmer to download programs into PIC microprocessors.
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Preamplifier suitable for guitar or microphone use.
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LED Sign uses two LED arrays to form a 7 X 10 matrix. It produces moving messages or animations stored in an EPROM.
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Casio QV-200 Digital Camera Cable. Lose your cable? Build it yourself and save $29. Fits many QV models.
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Tektronix THS720 Screen Capture Software. Basic software, not like the fancy stuff that costs real money.
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DTMF Tone Decoder hears touchtones and displays them as telephone numbers.
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Oxygen Sensors. When they go bad your automobile runs poorly, learn about them and build a substitute for diagnostics or off-road use.
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LCD Serial Terminal has RS-232 serial in/out, up to 20 programmable keys, Character LCD up to 2x40, 5 auxiliary inputs, 6 auxiliary outputs.
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555 Timer as an A/D Converter. Measure voltages accurately with a microcontroller using this simple circuit. Includes sample program for the
Parallax Basic Stamp.
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BookPC MP3 Player. A small computer running Linux with 12 volt power supply and wired remote control makes a great sound system for a car.
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Yet Another Mobile MP3 Player. This is an earlier player using a conventional PC motherboard, so the power supply I designed is quite compatible.
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