I want to build this circuit, taken from here, and I'm wondering exactly how crucial exact component values are.
I don't have any 220k, 22k, or 4.7k resistors. I'm wondering if I can substitute two 100k in series for the 220k, two 10k for the 22k and a 5.1k for the 4.7k. Of course I could do two 100k and two 10k to make the 220k, but that's 4 resistors in place of one. Will the 20k difference make that much of a...difference?
Also the circuit calls for 1n4148 or equivalent diodes. I have 1n4007. Since those are really just to make a bridge rectifier, could I just use a bridge rectifier component, or just substitute the 1n4007 diodes?
Finally, is a 2N2222 an acceptable substitute in this case for a 2N3904?