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Battery: Operated Heat Gun

Portable Cell-Phone Battery Charger
2 Comments - in Telephone
A very clever portable cell phone battery charger that uses 8x1.5 AA cells (batteries) to charge cell-phone / mobile phone batteries while mobile. No more need for a mains outlet!
Photo: Gun Sound Effects Chip with Ambulance, Fire, Machine Gun Sounds Gun Sound Effects Chip with Ambulance, Fire, Machine Gun Sounds
Easy to build Gun Sound Effects generator kits, also inludes several different sounds and tunes.
Photo: Peltier Junction Thermo Electric Heat Pump Peltier Junction Thermo Electric Heat Pump
Learn how to control temperature with a Peltier Junction with PID temperature controller.
Photo: Solar Battery Solar Battery
Teaches the fundamentals of a basic robotic sensing and locomotion principles while testing motor skills. Includes 5 switch wires controller to grab, release, lift, lower, rotate wrist, and pivot sideways 120°. Transparent arm shows the state-of-the-ar
Photo: Oscillator Building Blocks Electronic Kits Oscillator Building Blocks Electronic Kits
An educational learning module. Build and experiment with the astable, monostable and RS flip-flop multivibrators on one PC board with six LED's. Understand exactly how each one works. Operates on a 9 Volt battery.
Photo: Analog Multimeter Kit Analog Multimeter Kit
Old time style with the following options: 20,000 ohm/Volts, 19 Ranges, 3.5 Meter, dB Scales, Audible Continuity, Battery Tester, 10A DC Current.
Photo: Flasher Multi Sequential 5 LED Flasher Multi Sequential 5 LED
Flashes five very bright LED's in any one of seven, user-selectable, patterns. A COB (chip-on-board) IC makes assembly very easy; the chip is supplied premounted on its own board and a motherboard contains the entire circuit. Operates on 3 volts DC, batte