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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
6830
24 Dec 2014
2
A simple step-up transformer.
Power Source
Switch
Transformer
4051
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6282
20 Jul 2014
4
Sine Wave Oscillator
6839
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
4809
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3581
02 Jul 2014
7
Differentiator circuit
Power Source
Capacitor
Resistor
Op Amp
3574
28 Jun 2014
8
Sawtooth Wave Generator
4238
28 Jun 2014
9
Spike Generator
3331
24 Jun 2014
10
Triangle Wave Generator.
5010
22 Jun 2014
11
Square wave generator.
9953
20 Jun 2014
12
6 Volt Lamp Flasher
Transistor
Lamp
Capacitor
Battery
Resistor
4746
12 Jun 2014
1
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