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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
6701
24 Dec 2014
2
A simple step-up transformer.
Power Source
Switch
Transformer
3943
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6181
20 Jul 2014
4
Sine Wave Oscillator
6683
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
4673
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3449
02 Jul 2014
7
Differentiator circuit
Op Amp
Resistor
Power Source
Capacitor
3450
28 Jun 2014
8
Sawtooth Wave Generator
4106
28 Jun 2014
9
Spike Generator
3236
24 Jun 2014
10
Triangle Wave Generator.
4904
22 Jun 2014
11
Square wave generator.
9757
20 Jun 2014
12
6 Volt Lamp Flasher
Lamp
Resistor
Battery
Capacitor
Transistor
4638
12 Jun 2014
1
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