The DIY kit does not include the battery to measure the resistance capacitance inductance two or three pole and so on, may use the 9V battery directly to be possible to supply the power supply directly.
Item name: YD-CS transistor tester
Measurement range: automatic detection of PNP and NPN bipolar transistors, N, P channel MOSFET, JFET FET, diode, dual diode, SCR, resistors, capacitors, inducors.
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