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Components are the most basic elements in an electronic circuit. Characteristic is that they're in a single package. There are passive and active components, from as simple as a zero -ohm resistor to as complex as a multi-billion transistor IC.

1
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Its a P4SMA200A Transient suppresion diode. Looked for some info here: http://www.ecadata.de/ Then on the datasheet: You can find "200A" Here You can buy for example from Mouser or DigiKey.
answered Oct 7 '15 by Wesley Lee
26
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It is a "Chip on board". It is an ic wire bonded directly to the board, and then protected with some epoxi (the "black thing").
answered Mar 5 '15 by Wesley Lee
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If you want to do it using only N-FETs: simulate this circuit – Schematic created using CircuitLab When the digital signal is high: M3 is on. M1 is on, pulling the gate of M2, keeping it off …
answered Feb 19 '18 by Wesley Lee