Simple elevator control circuit

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

Single chip microcomputer STM32L151CCU6

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

The layout of the control elements and signal devices of each layer is shown in Figure 8-16. The line can be used in factories, warehouses to transport goods or restaurants to deliver meals, which is simple, safe and reliable.
The meanings of the component codes in Figure 8-15 and Figure 8-16 are shown in Table 8-10.
In the figure, the door switch ISA-4SA is used to ensure that the elevator can be started under the condition that the doors of each floor are closed; the end limit switches SQi and sQ2 are used to prevent the contact from sticking to the end of the car and causing an accident after the contactor loses power.