I'm a newbie to electronics even though I have been working on them for a few years in mostly a hobbyist setting. I'm posting here for the first time so please be gentle.
The problem I'm having with my old car is that the headlight switch's contacts are getting eaten away (it's apparently a common problem with my model). I'm not sure if a relay is being used on the circuit or not, I will have to check, but I assume the lights are being driven directly.
I have a 12 V to 15 V power supply (car voltage) driving 2 headlights (65 W * 2). So if I test the Load I should be getting around 9 amp draw (still have to test). If this is true, this will create a big spark that will eat away the contacts.
I read on the Internet that a possible solution is to attach a Snubber Network Over the Switch to reduce arcing.
So my questions are:
- What values would I use, and how do I calculate it
- Can I use something like high voltage home appliance electronics components to do it relatively safely?
- Would polarity be a issue? Eg. the order in which the capacitor and resistor is connected in reverence to the positive and negative terminals.
I would like to know how to calculate the values, even if you suggest other options, just to be able to protect simple switches and relays in the future against arching in DC circuits.
I see other uses for a Snubber Network would be in AC circuits and across MOSFETs and inductors. If you want, you can also explain the calculations for these because I read that they have more to do with the frequencies of circuits that these can produce, and this information could be helpful to me and others looking for it.