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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
7377
24 Dec 2014
2
A simple step-up transformer.
Transformer
Switch
Power Source
4641
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6782
20 Jul 2014
4
Sine Wave Oscillator
7436
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
5414
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
4149
02 Jul 2014
7
Differentiator circuit
Power Source
Resistor
Capacitor
Op Amp
4177
28 Jun 2014
8
Sawtooth Wave Generator
4805
28 Jun 2014
9
Spike Generator
3822
24 Jun 2014
10
Triangle Wave Generator.
5440
22 Jun 2014
11
Square wave generator.
10682
20 Jun 2014
12
6 Volt Lamp Flasher
Battery
Lamp
Resistor
Capacitor
Transistor
5292
12 Jun 2014
1
2
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98170
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