This be simple check pressure level circuit, with integrated number circuit TL431. When use power supply 5Volt in digital circuit. The general feeding signal input be high class logic be High, make have voltage way output be 5 Volt. But enough feed the level logic be Low as a result, make output level voltage be 1.8V this circuit uses the equipment a little 2 pcs. only just as a result can be usable already.
Voltage Detector circuits
More circuit by IC TL431
Level voltage indicator circuits
Battery Low Voltage Detector using IC 8211 This circuit can use with power supply since 5 volt until 25 Volt. When voltage of power supply or battery agree come to lower location level keeps. It make LED bright show know. Although the circuit this use how many is the equipment not,…
Low Voltage Battery Monitor by LM339 This low voltage circuit can be used to monitor battery and other voltage sources of current for problems. The circuit sounds an alarm and lights an LED, but can be interfaced to any number of other circuits for many different uses…..
Up to $20 shipping discount on first order now: https://jlcpcb.com/quote