DIY kits ATMEAG328 M328 Transistor Tester LCR Diode Capacitance ESR meter PWM Square wave Frequency Signal Generator|tester lcr|generator metermeter lcr - AliExpress
A simple ESR meter with ATmega8 and open source firmware (a do-it-yourself hobby construction)
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DIY KITS Digital Combo Transistor Tester LCR Diode Capacitance Inductance ESR meter / PWM Signal Generator / frequency meter|kit digital|diy kitesr meter - AliExpress
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DIY Meter Tester Kit For Capacitance ESR Inductance Resistor NPN PNP Mosfet M168 | Alexnld.com
$20 LCR ESR Transistor checker project
12864 LCD Display ATmega328 Transistor Tester Diode Triode Capacitance Meter/MOS/PNP/NPN M328 Multifunction Meter with Case|Capacitance Meters| - AliExpress
ESR Meter / Capacitance / Inductance / Transistor Tester