![]() ![]() ![]() Transistor Tester (MTester) talks about reflashing this type of tester with a new MTester firmware. MTester no version on LCD – how to check the version? LCR meter – MTester T7 – Transistor tester review The device can be powered with 6FF22 9V Battery,ĮEVblog #1020 – Is A $7 LCR / Component Tester Any Good? What is the hardware that does those test wonders? The display uses 12864 lcd LCD (128 * 64 characters) and the microcontroller is Atmega328 (same as in Arduino Uno). Please note that paper and electrolytic (particularly the higher voltage types) will always show some Vloss though, regardless of their state. Significant voltage loss % does mean the old capacitor is drying out. The reached load voltage is lost with electrolytic capacitors after a short period of time can be caused by by a parallel connected resistor and/or internal load dispersion inside capacitor.Ĭapacitors with more than few percentage voltage loss are suspect to be bad. The voltage loss (Vloss) is a voltage measurement taken shortly after a load pulse has charged the capacitor. Both ESR and Vloss can give you information on the quality of capacitor. On the capacitors measurements this tester measured besides capacitance also ESR (series resistance) and Capacitor voltage loss (Vloss). In my pictures I have installed the circuit board on the top if a small plastic box that has the 9V battery inside it. The meter has automatic detection PNP and NPN type bipolar transistors, N, P -channel MOSFET, JFET FET, diodes, two diodes, thyristors, resistors, capacitors, inductors.Ĭosts less than 10 Euros/USD on sale in circuit board format (there are more expensive cased versions). It can detect component types and measure them. MTester is a cheap electronics component measurement device. One day I got a cheap MTester from some Chinese source. ![]()
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