Comments on: Short circuit protection https://www.epanorama.net/blog/2020/11/08/short-circuit-protection/ All about electronics and circuit design Sun, 05 Apr 2026 18:35:45 +0000 hourly 1 http://wordpress.org/?v=3.9.14 By: Tomi Engdahl https://www.epanorama.net/blog/2020/11/08/short-circuit-protection/comment-page-1/#comment-1869234 Sat, 24 Jan 2026 13:39:07 +0000 https://www.epanorama.net/blog/?p=187095#comment-1869234 This design does not a proper short detection that detects overcurrent. This is a simple undevoltage trip, that detects short circuit only if it causes enough voltage drop (which does not always happen). So this circuit does not detect all short circuit cases, especially when this circuit is placed very near to high current battery power source.

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2020/11/08/short-circuit-protection/comment-page-1/#comment-1844654 Sun, 26 Jan 2025 13:54:10 +0000 https://www.epanorama.net/blog/?p=187095#comment-1844654 Bad unreliable design. There is no real current measuring, this circuit cuts out when voltage drops below certain adjustable value. At what current it happens depends heavilt on the wiring resistance and power source internal resistance (which can vary). And some other issues
https://www.epanorama.net/blog/2020/11/08/short-circuit-protection/

Short Circuit Voltage Protector Circuit With Ampere Rule and Buzzer Alarm

#electronic #protector #circuits
#overload #amperage #equipment
#tutorial #guide #solution #servive
https://www.facebook.com/share/r/12GK9YuD7Lt/

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2020/11/08/short-circuit-protection/comment-page-1/#comment-1751528 Mon, 17 Jan 2022 15:56:50 +0000 https://www.epanorama.net/blog/?p=187095#comment-1751528 Say Goodbye to Glass Fuses / 3 Excellent Short Circuit Protection
https://www.youtube.com/watch?v=mMceemkVEyM

0:08 inductor and mosfet

3:39 BD139 and mosfet

7:00 limit set by relay

viewer comments:

the circuit are very nice and great in many applications, but not for all areas. Such components sometimes break through and the current can then no longer be separated. The safest solution is still a fuse or a mechanical circuit breaker.

Awesome, thanks for sharing
However, in the schematic of the third circuit the polarities of both the LEDs are incorrect.

It is much more correct to use both a glass fuse and these circuits together.

Although, if you are not afraid of fire and have a lot of money to buy a new home, then ignore my comment.

Cool over current protection. And it’s adjustable

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