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This kit uses a single AA battery holder into which the user places a battery. 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 ourcircuit tester(consisting of an AA battery holder, variable resistor & crocodile clips).

Features:

• Displays battery charge level with 4 LEDs.
• Great for showing how operational amplifiers work.

Contents:

• 1 xPP3 Battery Clip Lead (Heavy Duty)
• 1 x3xAA Battery Cage with Clip
• 1 xLM324 Quad Op Amp
• 1 xIC Socket 14 Pin
• 1 x1N4001 Diode
• 4 xRed 5mm Diffused LED 275mCd
• 1 x680 Resistor
• 5 x220 Resistor
• 4 x22K Resistor
• 1 x100K Resistor
• 1 x1xAA Battery Cage with Leads
• 1 x Battery Tester PCB

Dimensions:

• PCB Length: 68.5mm
• PCB Width: 38mm