Externet
Well-Known Member
Hi.
LED on pin 11 is on, circuit works properly otherwise.
Replaced the IC twice, same behavior.
Picture shows circuit, green LED on pin 14 is on as supposed to, plus the problem red one on pin 11.
(the input voltage comes from a frequency-to-voltage converter LM2917N-8, which also works fine. LEDs indicate frequency inputted, for 30, 40, 50, 60, 70, 80... Hz
LED on pin 11 is on, circuit works properly otherwise.
Replaced the IC twice, same behavior.
Picture shows circuit, green LED on pin 14 is on as supposed to, plus the problem red one on pin 11.
(the input voltage comes from a frequency-to-voltage converter LM2917N-8, which also works fine. LEDs indicate frequency inputted, for 30, 40, 50, 60, 70, 80... Hz