12v led light

164

01:53:59

Was just testing this for a light in my car seems to work ok 

published 11 years ago

vehasmaa

11 years ago

Sadly cars power system is not stable. Its namely 12 Volts. Its not uncommon to have even 14,8 Volts levels in there... Personally i would go with some sort of constant current source on those leds...

reddykvijay

11 years ago

Use zenar for constant voltage ⚡

idrees

11 years ago

Nice

righthandrule

11 years ago

Vehasmaa said it. Your cars voltage is 12 volts when running off the battery. However when your car is running, the alternator increases your voltage to around 14.4 Volts normally. (This is to overcome the battery's potential voltage to charge it)

syko94

11 years ago

Sorted just added a new led

hurz

11 years ago

Apply an alternating voltage from 11V to 14.4V to see what will happen in a real automotive environment. And measure the current which is a good indicator how bright or healthy your LEDs are. 20mA +-10mA seems to me a good learning target for you.

MeMo70

11 years ago

Hi, you need add a resistor of 20 ohms. Check using 20, 30, 40, 50 ohms and watch the mA in led

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