Could anyone lead me in the right direction to finding a schematic for this?
Im trying to build my own 12-15v input to 5V 300mA(Isolated)output, power supply. The challenge is the power going out must be isolated because one of the things its powering is a voltage meter that reads the source 12-15v coming in from an alternator.
Ive tried constructing a couple of the schematics i've found on the internet but cant find one that does exactly what I want.
For the Traco do you mean something like **broken link removed**? This looks very interesting.
I found a couple of kits at digikey like you suggested Here and Here
The data sheet for the MAX1771 gives typical values. It doesn't give exactly the same circuit but you can use it as a guide to fill in the blanks.
I agree with blueroomelectronics that using a DC-DC converter module is an easier option but it's more expensive. Also if this is an educational project you'll probably get more marks for designing your own solution.
I ordered a TDK-Lambda Traco unit and the first one was defective. Returned it and the second one worked great for what i need. The voltage numbers on the meter still jump around a bit more than id like them to but i think its just the soldering and inaccurate potentiometer i'm using on the circuit. Thanks for the info!
A mentioned in the other thread, the output is highly unlikely to be isolated from the input which is one of the main requirements of the origional poster.
colin55,
Why did you have to delete your post after I responded to it?
Were you too embarrassed that you made a mistake suggesting that a cheap cigarette lighter powered 3V charger can be tweaked to give an isolated 5V supply?
Don't worry, we all make silly mistakes from time to time, it's normally better just to admit it rather try to hide it. If no one had responded then fair enough but I had responded so deleting your message was quite rude of you.