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STD Short Circuit Detection

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Update time: 2021-04-08 10:12:16
Creation time: 2016-06-28 15:55:08
Description
Short-circuit detection method with signalling a Raspberry (or Cubieboard in my case) over GPIO. I have a peripheral device that signals its host in one particular case by shorting out its power supply. This is how the host detects that signal (and starts a wake up process). Not the usual approach but sometimes you just can't have that extra wire to use for signalling. Tested on a Cubieboard + breadboard - works fine.
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ID Name Designator Footprint Quantity
1 120 R1 CK12-B 1
2 4.7k R2 CK12-B 1
3 BC547C Q1 SOT23 1
4 4,7k R3,R4 CK12-B 2
5 5 V1 BATTERY 1
6 1N4001 D2 DO35-7 1
7 1K R6 CK12-B 1
8 Ammeter A1 NONE 1
9 LED D1 LED3MM 1
10 Voltage_Controlled_Switch S1 NONE 1
11 PULSE(0 3 200u 0u 0u 400u 1m) V2 2P-5.0 1
12 1 R5 CK12-B 1
13 0.1u C1 CK05 1

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