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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
6863
24 Dec 2014
2
A simple step-up transformer.
Switch
Power Source
Transformer
4085
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6298
20 Jul 2014
4
Sine Wave Oscillator
6876
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
4851
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3608
02 Jul 2014
7
Differentiator circuit
Power Source
Resistor
Op Amp
Capacitor
3610
28 Jun 2014
8
Sawtooth Wave Generator
4264
28 Jun 2014
9
Spike Generator
3347
24 Jun 2014
10
Triangle Wave Generator.
5027
22 Jun 2014
11
Square wave generator.
9997
20 Jun 2014
12
6 Volt Lamp Flasher
Battery
Lamp
Transistor
Resistor
Capacitor
4789
12 Jun 2014
1
2
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