Features： 1、When encountering the need for isolation control and voltage conversion in actual work, this module will be used. 2、It can realize 3.3V or 5V control 3.6‑24V voltage level interface. After the control terminal is turned on, the controlled terminal will also be turned on. 3、The photoelectric isolation has strong anti‑interference ability. Copper clad laminate is sturdy and durable and has a long service life. 4、It can drive high power transistors, MOS tubes, etc. that require high voltage drive, and can also directly drive low‑power 24V relays. 5、The two 817 circuits on the board are independent, which can realize simultaneous control of different voltages. Specification： Item Type: Voltage Control Adapter Module Material: Copper Clad Laminate Center Distance of Mounting Hole: Approx. 22 x 32mm/0.87 x 1.26in Package List： 1 x Voltage Control Adapter Module