Simple voltage drop needed

rolijen's picture

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Joined: Oct 06, 2019

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Simple voltage drop needed
October 6, 2019 - 8:42am

Hi. Newbie here. I have a guitar amplifier that has a power indicator light on the front Panel. The two wires of the power indicator connect to two terminals on the main circuit board. I’ve measured 15.5vdc across these two terminals. The indicator lamp is rated 12vdc.

Here’s my question: I would like to replace the indicator Light with a different style of light. That different style only comes in a 6vdc version. How do I drop voltage to close to 6v? Zener? Resistor divider? I just need a simple answer and potentially a basic diagram as it's been a few years since I studied electronics.  Thank you!

Aswinth Raj's picture

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Joined: Aug 16, 2016

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use a voltage regulator not a voltage drop circuit
October 7, 2019 - 12:01pm

Hi rolijen, you have discussed only on the voltage rating here but have completly ignored the current rating. So before the take the following idea make sure you new 6V bulb has a current rating that is within the limit of our main circuit board.

That being said the best and safe way for you is to use a voltage regulator IC like 7806 which will convert the 12V dc to 6V DC. Do not use a zener of resistor method to drop voltage since they might burn easily if you current rating is more. You can refer to the following link for more detials

https://components101.com/7805-voltage-regulator-ic-pinout-datasheet

This particular IC regulates 5V you just have to use 7806 in place of 7805 to get 6V