Have you ever experienced a malfunctioning device without the slightest idea as to what the issue might be?
Typically, this issue is due to a blown fuse.
This basic circuit published at https://www.facebook.com/share/p/1Gi4UZHpVh/ claims to be able to serve as an instantaneous way for you to detect whether it is in fact due to a blown fuse or not. It is a small circuit that tries to make your job as an electronic technician easier.
When the fuse is in working order the LED remains “off.” When the fuse has blown, however the LED lights up to provide you with an obvious notification of the blown fuse condition. Therefore, you do not need to guess or waste time continually re-checking the same device as this simple idea can save so much troubleshooting time and effort when working with power supplies or batteries.
#innovation #learning #electronicproject #simplecircuit
Could this build in a simpler way?
Why not simplify the circuit by wiring the LED directly across the fuse ( with a current limiting resistor )
Source: https://theorycircuit.com/electronics-projects/blown-fuse-indicator/
The downside of his idea:
1. When fuse blows, there is no reliable full isolation of load because of the current through LED
2. If load is removed, LED does not indicate blown fuse
Another way it so place a power indicator across the supply after the fuse. It works by showing if power gets through the fuse or not. The downside is that the indicator LED will consume power all the time when power is on.
Links to other ideas:
https://dmohankumar.wordpress.com/2015/10/21/blown-fuse-indicators-simple-design-10/
https://www.eevblog.com/forum/projects/blown-fuse-indicator-design-validation-automotive/
https://electronicsarea.com/blown-fuse-indicator-circuit-using-one-transistor/
https://theorycircuit.com/electronics-projects/blown-fuse-indicator/
https://www.edn.com/simple-blown-fuse-indicator-sounds-an-alarm/
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