12v

I have a set of led headlights for my truck that won’t power up when plugged in or directly wired to car/automotive battery, yet when I use a little 23a 12v battery they do power up. I’m confused!! Why does this happen? And why won’t they work in my truck?

I'm designing a power window switch that will use two SPDT relays to reverse the motor for up/down. I have the whole system wired and and testing properly, but I need to optimize the design for the small space in which it will be installed. Can I daisy chain the 12v+(87) together and the...

The title says it all. There a bit more to it, but essentially i would like to connect a motorcycle 12v bullet headlight to a rechargeable 12v battery with a switch. I Know nothing about electronics so if someone could point me in the right direction that would be awesome. I would also like...

Hey, so I've got to build the circuit to output the signal specified below I've currently got an Arduino UNO and I have written the code to output this. however, I can only put out 5v from my Arduino and the circuit requires 12V and 10V output, being able to switch between12 and 0v incredibly...

Hello everyone, my unlce asked me if I was able to check out a flashing light for construction use ( Klemmfix Horizon 21307) and see whats wrong with because it didn't light up anymore. On further investigation, the batteries seemed to be fine (runs on 12V input) but the bulb (Xenon flashing...

Hi All, I bought a Waeco CF110 (A) fridge second hand and have found an interesting fault I can't diagnoise. Note: The Fridge can run off both 12V and 240V. In 12V operation the fridge runs perfectly. In 240V mode once warmed up a (after a period of ~40mins), the compressor will stop for a...

I have a deep cycle battery in my camper. Powering my TV from it. is no problem however there is no sound. When I switch on the engine the oscillator churns more voltage into the battery and then the TV speakers work. After turning off the ignition there is sound for a short amount of time...

Noob. I have a trailer that was broken into a few nights ago. I purchased a motion camera that records to an internal sd card. It comes with a power supply that has an output of 12v 1000mAh. My trailer is unattached to my truck for about 6 days out of the week. I'm wondering how to get...