The voltage across the terminals of a battery drops as soon as the battery is connected in a circuit. If the total resistance of the circuit is increased (using a variable resistor for example), the voltage across the terminals increases. emf = V + Ir, V = emf – Ir
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Describes the operation of the EGR pintle position sensor. This component installs right on top of the EGR valve itself. It is however, an indirect measurement system. The EGR PPS was widely used on FORD and Asian vehicles, with millions of models still in circulation. It is a type of variable resistor that changes voltage output as the EGR moves. See how it works in this concise video.
Me and a friend made a coilgun for a schoolproject. This is a video of the LED voltage indicator. The circuit was made with a LM3914 10 channel linear led driver. I use a 4M7, 82k+10k Ohm resistor and a 1M variable resistor as voltage divider. This video was made with the 1M variable resistor at +/- 0 Ohms, so the max voltage indicated is about 280V Specs coilgun: 5.5 cm coil, 75 turns, 2 layers, 1.6mm copper wire 10500 uF 320V capacitor bank 1430A 1000V Thyristor SCR As charging resistor I use a 75 Watt lightbulb, so the charging happens very slow. The full bridge rectifier can handle 700 Watts, so I use a hairdryer… Led schematics: i239.photobucket.com
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This video shows how to compute the resistance or capacitance of a cylindrical wire or capacitor with variable radius.
http://www.youtube.com/watch?v=gWKAOb2sAOs&hl=en
Vishay-Beyschlag 25 each of 79 values, Surface Mount Thin Film Resistor Kit 0402 0.1%, (E96) 150-976 Series MCS0402, Supplied as Tape-4×3 Bag in 1-4×9 Bin
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