Automatic water supply control circuit 3 for simultaneous monitoring of water tower and reservoir
Source: InternetPublisher:supremeOne Keywords: Control circuit BSP transistor Updated: 2021/12/27
The electronic control part of the circuit is shown in Figure 11-29. It consists of an inverter (VT±) and a negative NAND gate circuit (VT2,
VT3). The main circuit and control circuit are the same as Figure 11-27 (a).
This circuit uses two DC power supplies (-12V, -6V). The -6V power supply is used to make the emitters of transistors VT1 ~ VT3 in reverse bias (with a certain positive voltage) when
there is no signal input, so as to obtain Reliable depth cut-off prevents
malfunctions and improves the reliability of the automatic control device.
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