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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
6814
24 Dec 2014
2
A simple step-up transformer.
Transformer
Power Source
Switch
4029
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6270
20 Jul 2014
4
Sine Wave Oscillator
6809
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.
Diode
Battery
Lamp
4787
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3555
02 Jul 2014
7
Differentiator circuit
Op Amp
Power Source
Resistor
Capacitor
3556
28 Jun 2014
8
Sawtooth Wave Generator
4218
28 Jun 2014
9
Spike Generator
3324
24 Jun 2014
10
Triangle Wave Generator.
4999
22 Jun 2014
11
Square wave generator.
9918
20 Jun 2014
12
6 Volt Lamp Flasher
Transistor
Battery
Resistor
Lamp
Capacitor
4727
12 Jun 2014
1
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