I am a starting hobbyist and just built this circuit for testing:
http://circuit-diagram.hqew.net/Simple-Tone-Oscillator-Generator-by-2N2222_10535.html
but I don't get how the cap is discharging each cycle. If someone could point out & explain my thinking error I'd appreciate it:
1-9V pushes holes to top of the PNP while at the same time pushing holes through both resistors to push holes to the NPN gate while also pushing holes to the + side of the capacitor
2- ground pushes electrons to - side of capacitor, while pushing electrons up through NPN emitter, which triggers(amplified flow) through the NPN then the PNP, which triggers holes to flow down from PNP emitter to collector to (speaker)
So once the cap is charged, the flow goes through the transistors, eventually flowing straight through the PNP to speaker to ground. I don't get at what point/how the cap empties and then recharges again (creating the oscillation)
Would appreciate any help on this -
ps. I used very loose wording ('holes' 'pushes' etc) rather than exact terms i.e. just looking for a conceptual answer if possible
http://circuit-diagram.hqew.net/Simple-Tone-Oscillator-Generator-by-2N2222_10535.html
but I don't get how the cap is discharging each cycle. If someone could point out & explain my thinking error I'd appreciate it:
1-9V pushes holes to top of the PNP while at the same time pushing holes through both resistors to push holes to the NPN gate while also pushing holes to the + side of the capacitor
2- ground pushes electrons to - side of capacitor, while pushing electrons up through NPN emitter, which triggers(amplified flow) through the NPN then the PNP, which triggers holes to flow down from PNP emitter to collector to (speaker)
So once the cap is charged, the flow goes through the transistors, eventually flowing straight through the PNP to speaker to ground. I don't get at what point/how the cap empties and then recharges again (creating the oscillation)
Would appreciate any help on this -
ps. I used very loose wording ('holes' 'pushes' etc) rather than exact terms i.e. just looking for a conceptual answer if possible
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