Battery

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Switch Lamp Resistor Led Fan Transistor Capacitor Fuse Potentiometer Relay
Three-way Switch or How To Turn a Light On or Off From Either End of A Long Hallway Regardless Of The Position Of The Other Switch.
Battery Switch Lamp
6825
24 Dec 2014
Sam Watson
fuse
Transistor Fuse Battery Resistor Lamp
2211
29 Nov 2014
khawar mushtaq
Double Throw Double Pole Switch (DPDT)
Double Throw Double Pole Switch (DPDT)
Fan Battery Switch Lamp
5886
16 Jul 2014
Samir Sabri.
Using 'bucking' batteries: The voltage of the smaller battery is subtracted from the larger battery and the positive end of the smaller battery becomes the negative end of the two. This really works.
Diode Battery Lamp
4794
10 Jul 2014
Sam Watson
Quick but unregulated split power supply.
Battery
3566
02 Jul 2014
Sam Watson
6 Volt Lamp Flasher
Transistor Battery Resistor Lamp Capacitor
4731
12 Jun 2014
Sam Watson
Simple Fan connected
Simple Fan connected
Fan Battery Switch
7425
04 May 2014
Samir Sabri.