![]() ![]() LARGE & CLEAR LCD DIGITAL DISPLAY: 1.8" 128*160 TFT high-resolution display with Blue back light, different parameter is shown with different color, it is more convenient for you to check the parameter. J-FET, PMOS, NMOS, Silicon-diodes of various sizes and LEDs. Powered by DC 9V battery(not included).ĪUTOMATIC IDENTIFICATION: Automatically detect NPN and PNP transistors, N-channel and P-channel MOSFET, JFET FET, dual diode, silicon controlled rectifier, capacitor(even 25pF mica capacitor), and pin definition. Two-button operation, automatic 40-second countdown shutdown to avoid unnecessary waste. SIMPLE TO OPERATION: Transistor Tester Come with User guide. This multifunction tester can be used to test bipolar transistors, field-effect tube(FET), diodes, MOSFET(MOS), SCR,resistor, capacitor, Inductor, Thyristors which is available for various electric transistor testing. ![]() WIDE APPLICATION: A must have for any electronic test bench. The following is from the Amazon website. 3 Kuman Transistor Checker ZIF socket problem. Power Supply: 1 * 9V Battery (NOT Included)įig. Notice: Before measuring capacitance, the capacitor must be discharged, otherwise very likely damage the meter. It can measure capacitance of 25pF~100mF, resolution 1pF.ĢuF above capacitors can simultaneously measure the equivalent series resistance ESR values.Ĭan display in correct order and the diode symbol display two diodes, and gives the diode forward voltage. Resistance measurement resolution is 0.1 ohms, 50M ohms can be measured. Measures the gate MOSFET threshold voltage and the gate capacitance. It can detect bipolar transistors and MOS transistors protection diodes. Measures current amplification factor and base-emitter threshold voltage of bipolar transistors. Note: my test show many higher power SCRs and triacs can't be tested.Īutomatic identification components pin arrangement. One key operation with automatic power shutdown.Ĭan be powered by 9V battery (not included), also has external power interface for convenient use.Īutomatic detection of NPN and PNP bipolar transistors, N-Channel and P-Channel MOSFETs, JFETs,ĭiodes, double diodes, Thyristors and bidirectional thyristor, and LEDs. Micro-controller uses 8MHz external crystal, the measurement accuracy is better. In my final analysis I preferring the MK-168 over the Kuman tester. The Kuman was unreliable in checking LEDs as where the MK-168 did a good job. Most of the time I had to switch it off than immediately back on (test) then it worked. If sitting a white pressing the test switch it comes right on. I found the same SCR and Triac problem I had with the MK-168. To get around the ZIF socket problem I built my own adaptor as shown in the video. The case is almost too small to the point a could barely get the 9-volt battery into the tester. The ZIF socket is not soldered in and doesn't fit flush with the top of the case as shown below. This is understandable using a 9-volt battery. While it did check low power sensitive gate SCRs it couldn't check most SCRs and no Triacs I tried. The MK-168 had some bad internal solder joints I had to go into and fix. It displayed a picture of the device including internal diodes and pinout of transistor and MOSFETs, etc. The color display in the Kuman was nice cosmetically to the plain LCD display of the MK168. The Kuman checker has neither and is limited to small parts the fir the ZIF socket. The MK-168 with its 3-pin plug-in ZIF board and three clip cables makes checking large components such as TO-3 easy. Both are powered by a 9-volt battery and have auto power shutoff. They are useful for general information on components and for transistors and dual diodes identity pin connections. I own both models and discuss their use in the YouTube videos list below. Both check far more than just transistors, but a number of semiconductor and passive components as list below.īoth are available on Amazon as of 4-20-2018. The MK-168 and Kuman multifunction transistor checkers and the many related clones are inexpensive transistor checkers. Comparing ATmega328 Based Transistor Checkers ![]()
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