BOOK 1 (Second Edition) AUDIO CIRCUITS & LED CIRCUITS. 123 pages. FREE preview. Includes 15 projects using just 6 components, or less: Short-range SONAR, Intercom, Stereo 3rd Channel (the Haffler Effect), Theremin (a legendary musical instrument), Super-Sensitive Mic, Double Doorbell, Thousand-Year Flasher, Free Energy Flasher (literally runs off thin air), Battery LED (how to use LEDs), LED Torch/Flashlight, Conjuring Trick, Optical Illusion (classic proof of the subjective nature of experience), Diode Pump, Power Switch, and Auto Power-Down. Plus 32 tested circuit suggestions. Thomas Scarborough is arguably the most widely published electronics writer-designer of the 21st Century. He has done “cover” designs for Elektor, Everyday Practical Electronics, Nuts & Volts, Popular Mechanics, Servo, and Silicon Chip magazines. He is particularly well known for his small designs, for which he has won several awards....More >< Less