This graphical multi function tester is composed of resistance + capacitance + diode + inductor + transistor +mos. LCD 12864 LCD display, with a backlight, backlight color is generally yellow green. Power supply for 9V stacked battery. If for long time power supply, it can use 2 lithium battery composition of 8.4v battery as power supply. Function: *Automatic detection of NPN and PNP transistors, N channel and P channel MOSFET, diodes (including dual diode), thyristor, transistors, resistors and capacitors and other components. *Automatically test the pin of the element and display it on the LCD. *Display using 12864 LCD LCD (128*64 characters). *Higher test speed, effective component test: in 2 seconds (except for the larger capacitor, the measurement of large capacitance also takes a long time to measure the time for 1 minutes is normal). *One key operation, power on to test, one key to get the work done. *Power consumption off mode: less than 20 nA *Automatic shutdown function can avoid unnecessary waste, save battery energy, improve the life time. Features: 1. Using ATmega8, ATmega168 micro controller. 2. 2x16 character LCD display results. 3. One key operation, auto power off. 4. Turn off current is only 20nA, support battery operation. 5. Low cost versions do not support crystal, auto power off. 1.05k version of the software ATmega168 using the sleep mode to reduce power consumption in the absence of measurement. 6. Automatic detection of PNP and NPN bipolar transistor, N, P channel MOSFET, JFET, diode, dual diode, thyristor controlled silicon. 7. Automatic detection of pin layout. 10. For the bipolar transistor, diode detection and protection of MOSFET. 12. Measurement and symbol support two resistance showed that the highest four digits and the display unit. Resistance symbol display is connected to the tester probe (1-3). It can also measure the potentiometer. If the potentiometer is adjusted to the end of it, the tester can not distinguish between the middle and both ends of the pin. 13. The resolution of the resistance measurement is 0.1 ohm, the highest measured value of 50M ohm. 14. Can be detected and measured by a capacitor. Highest four digit number and unit display. Values can be from 25pf (8MHz clock, 1MHz 50pF@ clock) to 100mF. Resolution up to 1 pF (@ 8MHz clock). 15. The equivalent series resistance (ESR) capacitance value of the capacitor can be measured in the 2UF value. The resolution is 0.01 ohm and the two digit value is displayed. This feature requires at least 16K flash ATMEGA (ATmega168). 19. If more than 3 diode classes are detected, the number of diodes is built to display additional failed messages. This will only happen if the diode is connected to all three probes and at least one is the type diode. In this case, you should only connect the two probes and start the measurement again, one by one. 20. The capacitance measurement of single diode reverse value. The bipolar transistor can also measure, if you connect the base and the collector or emitter. 21. Only one out of the whole bridge connecting measurement. 22. The 25pf value lower than the capacitor is usually not detected, but with a diode in parallel or at least 25pf shunt capacitor. In this case, you must subtract the capacitance of the parallel part. 23. The resistance of less than 2100 ohms can measure inductance, if your ATMEGA has at least 16K flash. The range will be more than 20H from the 0:01mH, but the accuracy is not good. The measurement results show only a single element connection. 24. The test time is about two seconds, only the capacitance and inductance measurement will take a long time. 25. The software can automatically shut down the number of measurements before setting power. If the test current exceeds the maintenance current SCR and bidirectional thyristor can be detected. But the current of some semiconductor SCR and triac than the tester can provide higher trigger current. The test current available only about 6mA! Note that all the functions only for program memory more microcontroller as ATmega168. Specification: Weight: 51g / 1.8oz (approx.) Package list: 1 * ESR Meter .Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.