JohnJohn20
Advanced Member level 4
Hi. I have a 12V PSU which I want to reduce to 4V 2A PSU. I have used a NPN power transistor (BD137) plus a 270Ω resistor and a 5V zener to make a regulator which gives me a 4.4V output which is still too high.
Is it a good idea for me to just put a silicon rectifier of some sort in series with the regulator output to give me a further 0.6V drop thus giving me a 3.8 V regulated output?
Would that be reliable?
Ideally I should use a 4.6V zener which I can't get.
Thanks. Chris.
Is it a good idea for me to just put a silicon rectifier of some sort in series with the regulator output to give me a further 0.6V drop thus giving me a 3.8 V regulated output?
Would that be reliable?
Ideally I should use a 4.6V zener which I can't get.
Thanks. Chris.