This circuit is from a1970 documentation. R1 may have 10k and P1 47k. The transistors can be BC558 or equivalent according to the buzzer the power can be made with voltages from 6 to 12 V according to the buzzer. R2 is 2k2.
This circuit is from a1970 documentation. R1 may have 10k and P1 47k. The transistors can be BC558 or equivalent according to the buzzer the power can be made with voltages from 6 to 12 V according to the buzzer. R2 is 2k2.
