1. I don't know how much their external power supply should be (Just 6V? How many Watts?)
2. I am TRYING to use ohm's law to figure out which type of resistors I'll need... but something doesn't seem right... I suck at math
3. Capacitors/transistors. I am in the dark here. Will PN2222A transistors work?
25v 220uF Capacitor?
Any transistor will be OK with 12V.
Watch out! Sometimes the "wattage rating" applies to the power pulled from the wall
The resistor in series with the transistor base, I assume?
Do you need a capacitor? Where does it go?
I would've worried hooking my
... The power supply I found (I linked to it above) says it has 9W... this won't be a problem will it?
QuoteAny transistor will be OK with 12V.Most transistors will be OK with 12v. Many RF transistors are below that.