So the diodes we used for this are 1N4001s - known as rectifying diodes. Their job is to rectify. RECTIFY!
Then a voltage-smoothing capacitor of 10uF was used to smooth out the rectified ripple. And you need to make sure that this can handle at least the voltage put through the bridge rectifier by the AC power supply. Our’s was rated for 63V.
The resistor is a current limiting resistor that prevents too much of it from overloading the LED which is the indicator that it’s getting voltage to get all sorts of lit up.
One of the issues we had before this was how we were going to get AC current. We didn’t want to use straight up household supply because that’d be too much AC for the components and my poor breadboard. @Whixr came up with the brilliant idea to use a Commodore 64 power supply:
You can tell from this picture that the power supply can give either 5VDC or 9VAC. Well no problem! We can use the 9V AC and that won’t overburden the circuit.
But in order to get this connected to the breadboard using the plug from the C64 power supply, we needed to create an adapter of sorts. Here’s the C64 plug that would normally plug into the C64. The red portions are the male pins that are on the cable coming from the power supply that would be inserted into the computer. You’ll notice they are for ground, 5V DC, and the 9V AC:
Now to connect this cable to the breadboard, all you do is get a female DIN connector that you can plug the power supply cable into:
We used what’s in G and just mapped out the pins that we needed to account for. Here’s the @Atdiy ghetto style schematic for you!
Hope this helps!