Hello Peter, My names Rob, I'm from the UK and I'm a beginner when it comes to electronics, though I understand a lot of the theory, I'm used to electro/mechanical engineering like large scale alternators/engines etc. Im reviewing your design for this power supply (because I'm a keen guitarist, and to buy something like this here would cost around £130) and I've got one or two issues I was hoping you could clear up.
1. with regards to the full wave bridge rectifier, i have looked in RS catalogue for component and found one called the "KBU4 series" rated at 4A. However there are a range of different Vrrm values (100,200,400,800,1000). My guess would be that since the voltage will be stepped down to 12, i will only require one with a rating of 100Vrrm, is this correct?
2. I cannot find IN4002 diodes, only IN4002-E3 rated at 1A and 100Vrrm. will these suffice?
3. I know this is a novice question, but since im a novice, where does the LED fit into the circuit?
4. Looking through the Radioshack catalogue, there are a range of transformers available. Which is best to use? Chassis mount, PCB mount, Laminated, not Laminated etc. Also, what output current does the transformer have to be?
5. Have you identified a better Etching process yet? Since im new to this and i will be etching for the first time i thought i'd better find out. By the way, we can buy bags of persulphate crystals here in the UK at most electronics stores.
If you could answer these questions i'd really appreciate it. Im new to this site/forum thing, but once i start building it (this is the first electronics project i've ever done, but im getting plenty of help) i'll keep you updated if you like to show you what I've done.
Thanks,
Rob