Summary of NICAD-NIMH BATTERY MONITOR
This article describes a simple NiCad-NiMH battery monitor using the LM3914 IC. It tests dry cells, NiCad, and NiMH batteries with a voltage range of 0.15V to 1.5V. The circuit operates on 5V DC and uses ten LEDs to display voltage levels. A jumper allows switching between DOT and bar graph modes.
Parts used in the NiCad-NiMh Battery Monitor:
- LM3914 IC
- Ten light emitting diodes
- Jumper (J1)
- PCB
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?
It serves as test gear to easily monitor battery voltages for dry cells, NICAD, and NIMH types. - Can this monitor detect voltages up to 1.5 volts?
Yes, the project supports a battery supply up to 1.5 Voltage with a monitoring range of 0.15V to 1.5V. - Which integrated circuit is used in this design?
The project is built around the Texas Instruments LM3914 IC. - How does the LM3914 indicate voltage levels?
It drives ten light emitting diodes based on the voltage detected at the input connector. - What power source does the circuit require?
The circuit works on 5V DC. - How can I switch between display modes?
Jumper J1 is used to select either DOT mode or bar graph mode. - Is this device suitable for testing dry cell batteries?
Yes, it is designed to monitor voltages especially for dry cells, NICAD, and NIMH supplies.
