LCD Graphical Transistor Inductor Capacitor ESR Meter Multifunction Tester

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.

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:

*Added boot voltage detection 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.

*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 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.

8. The threshold voltage and current

measurement of bipolar 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 bipolar 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 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).

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

reverse 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 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.

26. The clock frequency accuracy of 50Hz

signal checking built-in self-test function and optional and waits for the call

(ATmega168).

27. Measure resistance optional equipment

calibration output port and zero offset self checking capability (ATmega168). The need for a 100nF to a 20uF capacitor connected to pin 1 and pin

offset voltage compensation analog comparator 3. This can reduce the

measurement error of 40uF capacitor. A correction voltage reference voltage was

found in ADC internal reference measurement to adjust the gain with the same

internal capacitor.

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.