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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.
Switch
Lamp
Battery
6740
24 Dec 2014
2
A simple step-up transformer.
Switch
Power Source
Transformer
3978
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6224
20 Jul 2014
4
Sine Wave Oscillator
6731
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.
Lamp
Battery
Diode
4708
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3486
02 Jul 2014
7
Differentiator circuit
Op Amp
Power Source
Resistor
Capacitor
3489
28 Jun 2014
8
Sawtooth Wave Generator
4147
28 Jun 2014
9
Spike Generator
3256
24 Jun 2014
10
Triangle Wave Generator.
4936
22 Jun 2014
11
Square wave generator.
9804
20 Jun 2014
12
6 Volt Lamp Flasher
Lamp
Battery
Transistor
Resistor
Capacitor
4683
12 Jun 2014
1
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