8 Low Battery Voltage Alarm indicator circuits using SCR transistor IC Circuit Diagram These are 8 Low Battery Voltage Alarm indicator circuits, as ideas to make small projects, they use LED display easy, cheap with normal parts look below
Description This circuit, designed on request, has proven to be useful to indicate when the voltage in a power supply line is changing from 120V to 240Vac. It can be used in different circumstances and circuits, mainly when an increase in ac or dc supply voltage needs to be detected.
LED DC Voltage Indicator Circuit Diagram
This is four circuits of LED voltage indicator are simple and easy to builds for check voltage battery and others, use as zener,transistor,LM339 and more
We have many ways to indicates an AC line. A good way, the AC mains voltage indicator circuit with a LED. It may be the best choice. It save and to be easy.
Many Simple LED AC mains voltage & current indicator circuits Circuit Diagram
The beeper circuit is built around this IC so when the IC activates it will blink the LED and the buzzer will start producing a beep beep sound, giving an indication of the detection. The time period of LED and buzzer activation is set by the values of the resistor and capacitor used at the input of 555 IC. A simple electronic part such as an LED can play an important role in displaying and monitoring the condition of this AC mains voltage and warn us of a possible electrical hazard. Here, I have explained exactly how to make ac voltage indicator using leds through a construction of a little electronic circuit.
