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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.
Lamp
Battery
Switch
6730
24 Dec 2014
2
A simple step-up transformer.
Transformer
Power Source
Switch
3972
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6221
20 Jul 2014
4
Sine Wave Oscillator
6720
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
Diode
Battery
4702
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3482
02 Jul 2014
7
Differentiator circuit
Op Amp
Capacitor
Power Source
Resistor
3484
28 Jun 2014
8
Sawtooth Wave Generator
4141
28 Jun 2014
9
Spike Generator
3254
24 Jun 2014
10
Triangle Wave Generator.
4931
22 Jun 2014
11
Square wave generator.
9795
20 Jun 2014
12
6 Volt Lamp Flasher
Lamp
Capacitor
Battery
Resistor
Transistor
4675
12 Jun 2014
1
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88634
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