Battery tester project kit

This kit has a single AA battery holder into which a battery can be placed, LEDs then illuminate to show the remaining capacity of the battery. The circuit uses a quad operational amplifier to provide a reference voltage and comparators to determine which LEDs should go on. This makes it a great kit for studying operational amplifiers.

Testing of the kit can be performed using an adjustable power supply, or with our circuit tester (consisting of an AA battery holder, variable resistor & crocodile clips).

Kit contents:

• 1 x PP3 clip lead
• 1 x 3AA battery holder
• 1 x AA battery holder (for test battery)
• 1 x LM324 op-amp IC
• 1 x 14 pin IC holder
• 1 x 1N4001 diode
• 4 x 5mm red LEDs
• 5 x 220ohm resistors
• 1 x 680ohm resistor
• 4 x 22Kohm resistors
• 1 x 100Kohm resistor
• 1 x battery tester PCB

PCB dimensions: 68.5mm x 38mm.

Requires x3 AA batteries, available separately.

Click here to download build instructions 

Note: Schools will receive a more detailed set of teaching notes on a CDROM.