To realize photoelectric conversion, is it necessary for chip resistors R1 and R3. And what is the role of R5?
Jihan 发表于 January 22, 2021
The role of R5 should be to simply convert the photoelectric conversion current into a voltage to facilitate the observation of the change signal.
Mulan 发表于 January 22, 2021
R1//R2 current limit, R3, C1 anti-interference, R3 should be much larger than D1 with light U/I and far smaller than the U/I without light, R5 current limit.
Bailyn 发表于 January 22, 2021
r5 should be current limiting.
