LCD Graphical Transistor Inductor Inductance Capacitance ESR SCR ESR Meter Multifunction Professional

LCD Graphical Transistor Inductor ESR Meter Multifunction

This graphical multi function is composed of resistance + capacitance + diode + inductor + transistor +mos. LCD 12864 LCD display, with a balight, balight color is generally yellow green. Power supply for 9V staed battery. If for long time power supply, it can use 2 lithium battery composition of 8.4v battery as power supply.

Function:

*Added boot voltage detection function.

*Automatic detection of NPN and PNP transistors, N channel and P channel MOSFET, diodes (including dual diode), thyristor, transistors, s and s and other components.

*Automatically test the pin of the element and display it on the LCD.

*The positive bias voltage of the emitter transistor can be determined by detecting the amplification factor and the base of the transistor, the MOSFET protection diode, etc.

*Measurement of gate threshold voltage and gate capacitance of MOSFET.

*Display using 12864 LCD LCD (128*64 characters).

*Higher test speed, effective component test: in 2 seconds (except for the larger , 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: le than 20 nA

*Automatic shutdown function can avoid unneceary waste, save battery energy, improve the life time.

Features:

1. Using ATmega8, ATmega168 or ATmega328 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 ATmega168 or ATmega328 using the sleep mode to reduce power consumption in the absence of measurement.

6. Automatic detection of PNP and NPN bolar transistor, N, P channel MOSFET, JFET, diode, dual diode, thyristor controlled silicon.

7. Automatic detection of pin layout.

8. The threshold voltage and current measurement of bolar transistor amplification and emitter junction.

9. Darlington through the transistor can be a high threshold voltage and high current amplification factor identification.

10. For the bolar transistor, diode detection and protection of MOSFET.

11. The threshold voltage and gate capacitance measurement value 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 probe (1-3). It can also measure the potentiometer. If the potentiometer is adjusted to the end of it, the 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 . Highest four digit number and unit display. Values can be from 25pf (8MHz clo, 1MHz 50pF clo) to 100mF. Resolution up to 1 pF ( 8MHz clo).

15. The equivalent series resistance (ESR) capacitance value of the 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 or ATmega328).

16. Two diodes can display the correct direction of the symbol. In addition, the forward voltage drop is shown.

17. LED is detected as a diode, the forward voltage drop is much higher than the normal. Dual light emitting diode detector for dual diode.

18. Zener diode can be detected if the re breakdown voltage is lower than 4.5V. This will be shown as two diodes that can only be determined by voltage. The probe surrounds the diode symbol is the same in this case, you can identify the diode real anode by 700mV near the threshold voltage!

19. If more than 3 diode claes are detected, the number of diodes is built to display additional failed meages. 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 re value. The bolar 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 is usually not detected, but with a diode in parallel or at least 25pf shunt . In this case, you must subtract the capacitance of the parallel part.

23. The resistance of le 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 can automatically shut down the number of measurements before setting power.

26. The clo frequency accuracy of 50Hz signal cheing built-in self-test function and optional and waits for the call (ATmega168 and ATmega328).

27. Measure resistance optional equment calibration output port and zero offset self cheing capability (ATmega168 and ATmega328). The need for a 100nF to a 20uF connected to pin 1 and pin offset voltage compensation analog comparator 3. This can reduce the measurement error of 40uF . A correction voltage reference voltage was found in ADC internal reference measurement to adjust the gain with the same internal .

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 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.)

Paage list: 1 *ESR Meter

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