3.7 Volts Battery Low and Full Level Indicator Circuit


On this project 3.7 Volts Battery Low and Full Level Indicator Circuit, we’re going to make a very simple Battery degree Indicator. This Indicator Circuit Is For 3.7/ Volts Indicator. We have Designed This Circuit With Few additives At home With easily available additives. Those components Can either Be gathered From An vintage Circuit Or can be purchased From An Electronics store effortlessly.

Cricut Diagram

3.7v Battery low complete indicator

Components required

  • Transistor – BC547 X1
  • Resistor – 1K X2
  • Resistor – 220 Ohm X3
  • PN-Junction Diode – 1N4007 X1
  • LED – 3V X2 (red For Low rate Indication And green For full charge Indication)
  • Battery – three.7V And 3V

Step 1.

First of all, join 1K Resistor To Base And Emitter Pin Of The Transistor As proven in the picture Given underneath.

3.7 volts battery indicator

Step 2.

In second forestall Solder 220-Ohm Resistor To The Collector Pin Of The Transistor As proven in the photo.

3.7v battery degree indicator

Step three.

On this Step connect 1 Kilo-Ohm Resistor With the second factor Of The 220-Ohm Resistor.

Three.7 v battery low full indicator

Step four.

In Step 4 join Diode IN4007 With the base factor Of Transistor As we have linked within the photograph Given under. Join The Cathode point Of Diode With the base factor Of The Transistor.

Three.7 V battery complete low indicator

Step 5.

Connect – point Of green Led With Diode – point And +Ve factor Of Led green Led With 1k Resistor As proven below.

Three.7v battery level indicator

Step 6.

Solder – point Of purple brought about -Ve factor Of The Diode And + factor Of pink Led With Collector point Of The Transistor As we’ve proven inside the Diagram Given underneath.

3.7V battery stage indicator

Trying out

Our Circuit Has Been completed Now We take a look at It through Connecting Battery. Connect +Ve Of 3.7 Volts Battery To +Ve point Of inexperienced LED And – point Of 3.7V Battery To Emitter factor Of The Transistor As we’ve related inside the Circuit Given below.

battery current level indicator


3.7V battery current level indicator/bat

While you’ll connect 3.V Battery Then pink LED Will Glow completely If The Battery might be Low. Green Led Will Glow whilst The Battery will be Charged Above three.2V.



Its tested Circuit Its complete production points can be visible in the Video Given below.

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