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Sam Watson
1
Lamp-flashing circuit.
Power Source
Lamp
Diode
11009
15 Jan 2026
2
6 Volt Lamp Flasher
Battery
Resistor
Capacitor
Lamp
Transistor
4608
15 Jan 2026
3
Differentiator circuit
Resistor
Capacitor
Power Source
Op Amp
3421
15 Jan 2026
4
Quick but unregulated split power supply.
Battery
3430
15 Jan 2026
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
4644
15 Jan 2026
6
A simple step-up transformer.
Switch
Power Source
Transformer
3912
15 Jan 2026
7
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
6676
15 Jan 2026
8
Square wave generator.
9720
24 Aug 2014
9
If circuit is built without resistor and fingertip bridges the gap the lamp will light. Water will also turn the circuit on, so it could be used to monitor any place that should stay dry. The lamp could be replaced by a sonalert for an audible alarm.
10636
14 Aug 2014
10
Full Wave Bridge prevents polarity mistake.
6161
27 Jul 2014
11
Sine Wave Oscillator
6644
16 Jul 2014
12
Filter capacitor in output of full wave bridge rectifier.
4763
30 Jun 2014
1
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