Project 1: Micro-power led flasher. Project 2: Set/reset flip-flop. Project 3: Mini-metronome. Project 4: Pendulum alarm. Project 5: Medium-wave RF preselector. Project 6: Electronic fishing lure. Project 7: Free-power AM receiver. Project 8: Dual-LED flasher. Project 9: 6V X 1A power supply. Project 10: Insect repellent. Project 11: Ultrasonic generator. Project 12: DC lamp dimmer. Project 13: Audio oscillator. Project 14: Audio switch. Project 15: 6 volts from 12V batteries. Project 16: One-component transmitter. Project 17: Wireless FM transmitter. Project 18: High-power audio oscillator. Project 19: Timer. Project 20: Micro AM radio. Project 21: Touch switch. Project 22: Simple fluorescent lamp inverter. Project 23: Touch on/touch off relay. Project 24: Experimental galvanometer. Project 25: Over-temperature alarm. Project 26: Capacitor tester. Project 27: Continuity tester. Project 28: Led bargraph. Project 29: Liquids shaker. Project 30: Signal tracer. Project 31: One-event register. Project 32: Noise generator. Project 33: Experimental ohmmeter. Project 34: Test your nerves. Project 35: Wireless beeper. Project 36: Electroscope. Project 37: Universal probe. Project 38: Tone-activated relay. Project 39: Light comparator. Project 40: Electronic organ. Project 41: Experimental light-alarm. Project 42: Photometer. Project 43: Sequence generator. Project 44: Signal injector. Project 45: Metal detector. Project 46: Crystal set. Project 47: Temperature-controlled oscillator. Project 48: Frequency-modulation siren. Project 49: Coin tosser. Project 50: Plasma oscillator.