Microprocessor with Projects and Ideas : microprocessor-controlled transistor lead identifier, smart fluid level indicator, pc based speed monitoring system, digital water level meter, universal high-resistance voltmeter, electrolysis-proof complete water-level solution, audio level indicator, laser controlled on/off switch, telephone conversation recorder, electronic voting machine, water-tank level meter, mini voice-processor, digital number shooting game, pc interfaced audio playback device, stepper motor driver, precision digital ac power controller, portable ozone generator, conference timer, add-on stereo channel selector, water temperature controller, emergency light, build your own c-band satellite tv-receiver, simple switch mode power supply, multichannel control using soft switches, ground conductivity measurement.