I have a wall adapter that converts AC power to 12V output. It powers a load that draws 300ma. I want to drop the voltage closer to 9V. I read that diodes have a voltage drop of between around 0.6V-0.8V per diode, so I hooked up 4 diodes in series and expected a new voltage of between 9.6V-10.2V, but my multimeter reads it's around 11 Volts.
Did I misunderstand how this works?
I do have a 9V regulator so I can use that instead but was wondering why this didn't work.
Previously, I remember I had the same issue when I tried to drop 3V to 1.5V using 2-3 diodes, but voltage was still higher than expected. 1.5V regulators are harder to get so I was hoping to use this diode method, if I can get it to work.
Did I misunderstand how this works?
I do have a 9V regulator so I can use that instead but was wondering why this didn't work.
Previously, I remember I had the same issue when I tried to drop 3V to 1.5V using 2-3 diodes, but voltage was still higher than expected. 1.5V regulators are harder to get so I was hoping to use this diode method, if I can get it to work.