Summary of NICAD-NIMH BATTERY MONITOR
This article describes a simple NiCad-NiMh battery monitor circuit built around the Texas Instruments LM3914 IC. It monitors dry cell, NICAD, and NIMH batteries with a range of 0.15V to 1.5V, driving ten LEDs based on detected voltage levels. The circuit operates on 5V DC and includes a jumper (J1) to switch between DOT mode and bar graph mode, making it useful as test gear for battery voltage monitoring.
Parts used in the NiCad-NiMh Battery Monitor:
- Texas Instruments LM3914 IC
- 10 Light Emitting Diodes (LEDs)
- Jumper J1
- PCB
- Input Connector
This project is a NiCad-NiMh Battery Monitor based on LM3914 IC
DESCRIPTION
The simple project can be used as test gear. Its easy way to monitor the battery voltages, especially dry cell, NICAD, NIMH, supply up to 1.5 Voltage. Battery Monitor range 0.15V to 1.5V. The project is built around Texas instruments LM3914, The LM3914 senses the voltage levels of the battery and drives the 10 light emitting diodes based on the voltage detected on input connector. Circuit works on 5V DC. J1 Jumper is used to select the DOT mode or bar graph mode.
SCHEMATIC
PARTS
PCB
Source: NICAD-NIMH BATTERY MONITOR
- What is the primary function of this project?
The project serves as test gear to monitor battery voltages for dry cells, NICAD, and NIMH supplies. - How does the LM3914 operate in this circuit?
The LM3914 senses the voltage levels of the battery and drives ten light emitting diodes based on the detected voltage. - What is the voltage monitoring range of this device?
The battery monitor has a range from 0.15V to 1.5V. - Does the circuit require a specific power supply?
The circuit works on 5V DC. - How can I change the display mode of the LEDs?
Jumper J1 is used to select either DOT mode or bar graph mode. - What type of batteries is this monitor designed for?
It is designed for dry cell, NICAD, and NIMH batteries. - Can this project be built using a PCB?
Yes, the project description mentions a PCB as part of the build components.
