Darkroom timed exposure circuit 4
Source: InternetPublisher:方世玉223 Keywords: Optoelectronics LM324 Updated: 2021/08/05
Darkroom timed exposure circuit 4
It uses the LM324 operational amplifier Az as the timing circuit and the 7812 three-terminal fixed
integrated voltage regulator Ai as the working power supply. Adjust the potentiometer RP to change the exposure time in the range of 2-60s. If longer
delay is required, the capacity of capacitor Cz can be increased.
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