This 6V continuity tester was obtained from a 1965 documentation. R1 has 150 ohm, R2 250k and R3 470k. C1 is 25 uF and C2 5 nF. Diodes are commonly used.
This 6V continuity tester was obtained from a 1965 documentation. R1 has 150 ohm, R2 250k and R3 470k. C1 is 25 uF and C2 5 nF. Diodes are commonly used.
