Description: Uses single-chip microcomputer ATMEAG328P DIP-28. With IC socketThe display unit uses a 160x128 pixel color display, 8x20 characters on the entire screen, 16-bit color depth, graphic display of component symbols, rotary coding switch control, one-button measurement, automatic shutdownAutomatically detect NPN and PNP transistors, field effect transistors, diodes, dual diodes, thyristors, thyristors, and automatically identify the pin distribution of the above transistorsTest the common emitter current amplification factor of NPN and PNP transistors, measure up to 2 resistors at a time, and the highest resolution of resistance measurement is 0.01. It can measure up to 50M, the capacitor measurement range is from 25pF-100mF, the resolution is 1pF, and the equivalent series resistance (ESR) of capacitors greater than 90nF is measured at the same time. The resolution of the equivalent series resistance is up to 0.01. For capacitors greater than 5000pF, the voltage drop rate after charging is displayed at the same time. This value can reflect the quality factor (Q value) of the capacitor. It can measure up to two diodes at a time, and display their positive and negative poles and conduction voltage. The light-emitting diode is also displayed as a graphic symbol of a diode, and its conduction voltage is much higher than that of an ordinary diode. Additional functions include frequency measurement, voltage measurement, square wave generator, PWM generator, infrared remote control decoding, infrared remote control encoding, DS18B20 temperature sensor test, DHT11 temperature and humidity sensor test, color selection, debugging and calibration, continuous test, etc. The frequency measurement range is from 1Hz to 1MHz or higher. When the measured frequency is lower than 25kHz, the period can be displayed, and the resolution can be up to 0.001mHz. DC voltage measurement up to 50V