When I was in my mid teens I copied this schematic from one in 50 projects kit from RadioShack. That little toy got me started in electronics, I would recommend something like that for any parent whose kids seems to be leaning that way.
Here is the schematic( I know the speaker capacitor is backwards, like I said I was in my teens when I drew it):
For reasons i don't quite understand Q1 is critical, I have built this circuit several times. So other than the capacitor this schematic is verified. The only thing I can figure that is wrong is the gain of Q1( the components listed have been used and work). In an attempt to understand this circuit better I have redrawn it as follows:
I started this thread to open speculation on what it is about Q1 that is so critical. The next time I wire this on a protoboard, I will probably try a Sziklai pair and see if it makes a difference. On the next layout I will leave off the switch.
Here is the schematic( I know the speaker capacitor is backwards, like I said I was in my teens when I drew it):
For reasons i don't quite understand Q1 is critical, I have built this circuit several times. So other than the capacitor this schematic is verified. The only thing I can figure that is wrong is the gain of Q1( the components listed have been used and work). In an attempt to understand this circuit better I have redrawn it as follows:
I started this thread to open speculation on what it is about Q1 that is so critical. The next time I wire this on a protoboard, I will probably try a Sziklai pair and see if it makes a difference. On the next layout I will leave off the switch.
Last edited: