AMS1117-ADJ onboard DC seat for easy access to power supply. The onboard 7*7 self-locking switch is convenient to control the power on and off during the experiment. The onboard power indicator indicates whether the power is on. 4 output voltage interfaces to facilitate connection during experiments. The AMS1117-ADJ module has the function of buck and adjustable. In order to ensure stable output, a 1.5V pressure difference needs to be maintained.