Punch photoelectric control safety device circuit four
Source: InternetPublisher:三岁就很酷 Keywords: Optoelectronics device circuits BSP Updated: 2020/02/25
It also uses dual-channel photoelectric control .
The alarm circuit consists of transistors VTa and VT9, which form a self-excited multivibrator, VTio and VTl, to produce audio oscillation. Choosing
unequal coupling capacitors Cl and C2 can achieve uneven tone and increase the sense of warning.
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