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Sam Watson
1
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
7376
24 Dec 2014
2
A simple step-up transformer.
Transformer
Switch
Power Source
4639
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6779
20 Jul 2014
4
Sine Wave Oscillator
7431
16 Jul 2014
5
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.
Battery
Lamp
Diode
5412
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
4145
02 Jul 2014
7
Differentiator circuit
Power Source
Resistor
Capacitor
Op Amp
4176
28 Jun 2014
8
Sawtooth Wave Generator
4802
28 Jun 2014
9
Spike Generator
3819
24 Jun 2014
10
Triangle Wave Generator.
5438
22 Jun 2014
11
Square wave generator.
10679
20 Jun 2014
12
6 Volt Lamp Flasher
Battery
Lamp
Resistor
Capacitor
Transistor
5289
12 Jun 2014
1
2
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98130
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