I got a few questions about this circuit.
1. Will any npn, pnp transistors work with this circuit? Like 3906 and 3904 transistors? what can i use as replacements instead of the ones in the schematic?
2. What is the relay used for in this circuit? and can i use a 12v mini relay instead?
3. Finally. The Diodes i have are 1N914 type can these be used?
I think thats all the questions I have. Thanks!