The schematic diagram is as shown in the figure below. Is there any problem with the drive circuit I designed? The power supply voltage is 24V. DTD113 is a switching triode. The resistors in the picture are reserved. According to this tube, there is no need for external resistors. DO1 DO2 is directly connected to the pins of STM32 PB12 PB11.
Liliana Publicado en August 14, 2020
If there is a problem, how does the triode ib get current? Connect to such a high voltage, if the string is connected to the IO port, the IC will be burned.
Elena Publicado en August 14, 2020
The relay is connected to the collector of the triode.
Andres Publicado en August 14, 2020
Now the relays are driven by optocouplers and the triode is not well isolated.
