Car battery monitor circuit diagram

Posted on Feb 7, 2014

When the battery voltage is 11. 5V or less transistor Q1 is turned on and the LED D1 will be bright. When the battery voltage is between 11. 5 and 13. 5 V, the transistor Q2 is turned on and the LED D2 will light up. When the battery voltage is 13. 5V transistor Q3 will be on the D3 and the LED will light. The schematic diagram come fro

Car battery monitor circuit diagram
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m circuit: Car Battery Monitor with 3 LED power supply. Go to that page to read the explanation about above power supply related circuit diagram. Car Battery Monitor circuit This is a circuit diagram of the 3 LED bar graph type battery monitor ideal for monitoring the voltage level of the car battery voltage with battery. When the battery voltage is 11. 5V or less. Here is a simple battery monitor circuit in which the LED will continue flashing until battery voltage is above the level. Transistors Q1 and Q2 are wired as an astable multivibrator circuit. This flashing battery monitor circuit can operate from a variety of voltages from 6V to12V. The voltage level at which an LED stops flashing can be set by adjusting R4. When the a preset battery voltage reaches threshold flashing frequency decreases andwhen the voltage drops below the threshold of the diode D1 LED turns OFF. This is used to compensate for changes in voltage of the base emitter Q1 due the. This NiCd battery charger circuit is very simple but it has a current and voltage limiting. Lamp L1 will light brightly and the LED will be out when the nicd battery is low and being charged, but the LED will. The following figure shows a diagram of power fluorescent lights to a normal battery. It is very convenient when you can not use the grid. Principle of operation This scheme is a voltage converter for the type of blocking oscillator. . The following schematic is a...

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