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Short Circuit Detection

3 years ago 643
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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.

Documents

Short Circuit Detection

BOM

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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