12864 LCD Display ATmega328 Transistor Tester Diode Triode Capacitance Meter / MOS / PNP / NPN M328 Multifunction Meter

About Transistor Multifunction Tester:

The tester uses a 3.7V rechargeable lithium battery (battery model: 14500 not included) but you can use the T-MICROUSB plug to charge the battery and power the system for a long time in the more economical and practical indoor use, eliminating the need to always be replaced economical input battery!

Features:

One key measurement operation, automatic power off delay. Shutdown current is only 20nA, support battery operation.
Auto-sensing PNP and NPN bipolar transistor, N MOSFET, P channel, JFET FET, diodes, two diodes, thyristors, resistors, capacitors, inductors. Automatic detection pin definitions.
Measurement of the current amplification factor (B) of the bipolar transistor and the ignition voltage of the emitting junction (Uf). The amplification factor of Darlington transistors can be identified by the high threshold voltage and the high current.
Can detect bipolar transistors and internal MOSFET protection diodes and displayed on the screen.
MOSFET threshold voltage and gate capacitance measurement.
Support two resistance measurements, the potential can be measured. If the potentiometer is adjusted at its end, the tester cannot distinguish between the middle and the ends of the pin.
Resistance measurement resolution is 0.1 ohms, maximum measurement value 50M ohms.
Capacitance measurement range from 25pf to 100mF (100,000 UF). Resolution up to 1pF, inductance measurement range 0.01MH-20H, otherwise it will appear as a resistance, the inductance dc resistance is higher than if Europe 2100 will also be displayed as a resistance.
It can detect 2UF above the capacitor equivalent series resistance, a resolution of 0.01 ohms. This characteristic is very important for the detection of capacitor performance.
It can display symbols of the two diodes in the right direction, also shows the front voltage drop.
LED detection for the front diode voltage drop greater than normal. Double led detected as double diode. Simultaneous detection of light emitting diodes will flash.
The time for each test is about two seconds, only large capacitance and inductance measurements will take a long time.

Correction:

Short three test side, in the test, the screen prompts the correction step. When prompted to disconnect the short end of the calibration time three tests will continue, when prompted in the access 100nF capacitor 1-3 feet over time, the access to the distribution after correction 1uF capacitors program will automatically enter to the next step. Correction until the end of the restart to complete the correction.

The main parameters and use:

1. Use of the ATmega8, ATmega168 or ATmega328 microcontroller.
2. 2x16 character LCD display results.
3. One button operation, automatic power off.
4. Stop current of only 20nA, support battery operation.
5. Low cost version without crystal, automatic power off. ATmega168 or ATmega328 software version 1.05k in standby mode when no action to reduce power consumption.
6.PNP and NPN auto-sensing bipolar transistor, N MOSFET, P channel, JFET, diodes, dual diode, SCR thyristor.
7. Automatically detects the pin layout.
8. The threshold voltage and current amplification factor of the emitter junction of the bipolar transistor measures.
9. Darlington transistor through high threshold voltage and high current amplification factor identified.
10. Pairs of bipolar transistors, MOSFET protection diode test. The threshold voltage value 11 and the gate capacitance of a MOSFET are measured.
12. Supports two resistance measurements and the symbols show the four highest numbers and units. Both ends of the resistance symbol are shown connected to the number of test probes (1-3). Therefore, the potential can also be measured. If the potentiometer is adjusted at its end, the tester cannot distinguish between the middle and the ends of the pin.
13. Resistance measurement resolution is 0.1 ohms, the highest measured value 50M ohms.
14. Can be detected and measured a capacitor. Maximum four numbers and units. Values ​​can be from 25pf (8MHz clock, 50pF @ 1MHz clock) to 100mF. Resolution up to 1 pF (clock @ 8MHz).
15. May be greater than the series resistor value equivalent to 2UF. 0.01 ohm resolution and two digit digital display. This feature requires at least 16K Flash ATMEGA (ATmega168 or ATmega328).
16. Can display the symbols of the two diodes in the right direction. In addition, the front voltage drop displayed.
17. LED detection for front diode voltage drop is much higher than normal. Double led detected as double diode. Zener diode
18. Can be detected, if the reverse breakdown voltage is less than 4.5V. This will appear as two diodes, can only be determined by voltage. Probe around the diode symbol is the same, in which case you can 700mV threshold voltage close to the real anode of recognition diode!
19. If more than three pieces of inspection diode type, failure to establish the number of diodes another message. This will only happen if the diode is connected to all three probes and at least one diode. In this case, you only need to connect the two probes and start measuring again, one by one.
20. Measures reverse capacitance values ​​of a single diode. Bipolar transistors can also measure, whether you connect the base and the collector or the emitter.
21. Need to find a measurement of the full bridge connection.
22. Values ​​of pf capacitors below 22 are usually undetectable, but with one diode in parallel or at least one 25pf capacitor in parallel. In this case, you need to subtract room shunt capacitance values.
23. The ohm resistor will measure an inductance less than 2100, if you have at least 16K ATMEGA flash. Range of 0: 01mH as 20H, but the accuracy is not good. The measurement results show only one connection element.
24. The test time is about two seconds, only capacitance and inductance measurements will take longer.
25. The software can be set to automatically turn off the power to measure the number of times before.
26. Built-in self-test function with selectable 50Hz signal clock frequency check accuracy and wait for call (ATmega168 and ATmega328).
27. Optional calibration of the resistance and zero offset of the self-test capability of the port output measuring equipment (ATmega168 and ATmega328). Need a 100nF to 20uF capacitor plugged in to compensate the analog comparator between pins 1 and 3 of the offset voltage. This can reduce the 40uF measurement error above the capacitor. With the same internal calibration capacitor voltage reference voltage is found at the internal adjustment reference measurement adc gain.
If the test current exceeds the holding current, the thyristor and the triac can be detected. But higher current than solid state SCR and triac tester can provide the trigger current. The available test current is only about 6mA! Note that all functions only used single chip program memory like more ATmega168.

Package Included:

1 x meter (battery not included)
3 x Test Cable