Are you looking for a simple circuit to measure your Lithium Ion single cell charging and discharging level? Here is one chip circuit, powered up from the same Lithium Ion battery you want to measure.
This circuit is designed to measure 3.7V rechargeable batteries level.
4.2V - 100%; 4V - 80%; 3.8V - 60%; 3.6V - 40%; 3.4V - 20%
LED1 - RED; LED2 - YELLOW; LED3 - YELLOW; LED4 - GREEN; LED5 - GREEN
D1 is used to protect a circuit from the battery being placed wrong way. You can use 1N4007 or something similar.
When this circuit was simulated on LTSpice, I used R1 value 18k, however, after this circuit was soldered on a printBoard, this value was to high, so I had to change it to 15k. It might be because of inaccuracy of the other resistor values.
This circuit indicates the battery current of 3.7 volts and you can detect the amount of energy remaining in your battery. Simply connect the battery to the circuit, and the circuit to save the battery voltage and connect it to an LED display.
This circuit is suitable for use in appliances such as digital watches or alarm clocks, or part out of the box you can save on a combined energy coupling that rests in your battery. Circuit d'indicator de niveau de batterie de 3.7 volts
Are you looking for a simple circuit to measure your Lithium Ion single cell charging and discharging level? Here is one chip circuit, powered up from the same Lithium Ion battery you want to measure.
This circuit is designed to measure 3.7V rechargeable batteries level.
4.2V - 100%; 4V - 80%; 3.8V - 60%; 3.6V - 40%; 3.4V - 20%
LED1 - RED; LED2 - YELLOW; LED3 - YELLOW; LED4 - GREEN; LED5 - GREEN
D1 is used to protect a circuit from the battery being placed wrong way. You can use 1N4007 or something similar.
When this circuit was simulated on LTSpice, I used R1 value 18k, however, after this circuit was soldered on a printBoard, this value was to high, so I had to change it to 15k. It might be because of inaccuracy of the other resistor values.
This circuit indicates the battery current of 3.7 volts and you can detect the amount of energy remaining in your battery. Simply connect the battery to the circuit, and the circuit to save the battery voltage and connect it to an LED display.
This circuit is suitable for use in appliances such as digital watches or alarm clocks, or part out of the box you can save on a combined energy coupling that rests in your battery. Circuit d'indicator de niveau de batterie de 3.7 volts
No comments:
Post a Comment