bunghole
New Member
i have an idea of how to build a current relay, which closes a contact after current falls below a preset measurement/reading/rating. i have another thread about current clamps, https://www.electro-tech-online.com...asuring-device.35634/?highlight=current+clamp
which i can use with a under voltage indicator (like the one with a dual colour led used in cars to tell you if voltage falls below a certain level).
i want to use this as a headlight fault detection unit.
a 100w headlamp globe draws 8.3 amps at 12v. the supply to the headlamp is monitored by the ferrite clamp, which sends a constant signal to the voltage indicator. when the current flowing in the wire drops below 8.3 amps, the clamp, output voltage from the clamp drops, and the voltage indicator reads this as under voltage, and applies voltage to a relay, which controls an internal indicator, turning it on when the current falls below 8.3 amps, telling you there is a headlamp fault.
is this is an ok circuit/idea i could use? i just thought about it and it seemed possible.
which i can use with a under voltage indicator (like the one with a dual colour led used in cars to tell you if voltage falls below a certain level).
i want to use this as a headlight fault detection unit.
a 100w headlamp globe draws 8.3 amps at 12v. the supply to the headlamp is monitored by the ferrite clamp, which sends a constant signal to the voltage indicator. when the current flowing in the wire drops below 8.3 amps, the clamp, output voltage from the clamp drops, and the voltage indicator reads this as under voltage, and applies voltage to a relay, which controls an internal indicator, turning it on when the current falls below 8.3 amps, telling you there is a headlamp fault.
is this is an ok circuit/idea i could use? i just thought about it and it seemed possible.