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.
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, not included
This kit is supplied in a simple grip seal bag version without instructions. Also available in a blister retail packaging version complete with printed instructions
Electrical
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Mechanical
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