2017-07-30

[public] 627K views, 18.2K likes, dislikes audio only

GreatScott!

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More project information (schematic, pictures, ....) on Instructables: https://www.instructables.com/id/DIY-Short-Circuit-Overcurrent-Protection/

Parts list (incomplete, see Instructables for more information, affiliate links):

Aliexpress:

1x Relay (12V one with 2 changeover contacts): https://s.click.aliexpress.com/e/_dXytThh

2x PCB Terminal: https://s.click.aliexpress.com/e/_dYbstfZ

1x LM358 OpAmp: https://s.click.aliexpress.com/e/_d6VP6J1

2x BC547 NPN Transistor: https://s.click.aliexpress.com/e/_dU81lmT

1x 5mm green LED: https://s.click.aliexpress.com/e/_dV63r7D

1x 1N4007 Diode: https://s.click.aliexpress.com/e/_dYR45Bh

1x Tactile Switch (NC): https://s.click.aliexpress.com/e/_dXIIMcP

6x 1kΩ, 2x 20kΩ Resistor: https://s.click.aliexpress.com/e/_dTPpXjt

1x 10kΩ Trimmer: https://s.click.aliexpress.com/e/_dTFyPv5

1x 0.1Ω Resistor: https://s.click.aliexpress.com/e/_dZKdSGL

Ebay:

1x Relay (12V one with 2 changeover contacts): http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182591166464&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

2x PCB Terminal: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=171758278263&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x LM358 OpAmp: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=130750396561&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

2x BC547 NPN Transistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182523085678&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 5mm green LED: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=181723557701&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 1N4007 Diode: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=201415026157&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x Tactile Switch (NC): http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182506452262&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

6x 1kΩ, 2x 20kΩ Resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=401036186511&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 10kΩ Trimmer: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182551169452&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 0.1Ω Resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182383981237&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

Music:

2011 Lookalike by Bartlebeats

Killing Time, Kevin MacLeod (incompetech.com)

In this project I will show you how to create a simple circuit that can interrupt the current flow to a load when the adjusted current limit is reached. That means the circuit can act as an overcurrent or short circuit protection.