TransistorTester with AVR microcontroller M168
わずか $10.98 で購入(送料込み)で購入したAVRマイコン組み込みテスターキットですが、これが驚くべき高機能です。
部品点数も少なくて作りやすく、調整は自分で勝手にやってくれます。
時代の進化恐るべし。
抵抗、コンデンサ、コイル、ダイオード、トランジスタの全てを測定してくれます。しかも、3つの端子のどこにつないでも自動感知して表示してくれるので、全くスペックの分からない半導体でも適当につなげば測定できます！
回路図、測定方法なども公開されています(英語)。
Features:
1 : a key measurement operation , auto power off delay . Shutdown current is only 20nA, support battery
operation.
2 : Automatic detection PNP and NPN type bipolar transistors , N, P -channel MOSFET, JFET FET , diodes , two
diodes, thyristors , resistors , capacitors , inductors . Automatic detection pin definitions.
3 : Measurement of the bipolar transistor current amplification factor (B) and conduction voltage emitter junction
(Uf). Darlington transistor may be identified by the amplification factor of the high threshold voltage and high current .
4 : can be detected inside the bipolar transistor and MOSFET for protection diodes and displayed on the
screen.
5 : the threshold voltage and the MOSFET gate capacitance measurement .
6: Support two measuring resistors , the potential can also be measured . If the potentiometer is adjusted to its
end , the tester can not distinguish the two ends of the pin and the middle .
7 : Resistance measurement resolution is 0.1 ohm , the highest measurement value of 50M ohms.
8: capacitance measurement range from 25pf to 100mF (10UF). Resolution up to 1 PF.
9: can detect more than 2UF capacitor equivalent series resistance (ESR), with a resolution of 0.01 ohms. This
feature is very important for the detection capacitor performance.
10 : You can display for symbols of the two diodes in the right direction , also shows the forward voltage drop
.
11: LED detection of diode forward voltage drop higher than normal . Dual LED detected as double diodes.
Simultaneous detection of light-emitting diodes will flash .
12: each test time is about two seconds , only large capacitance and inductance measurements will take a long time
.
Specifications:
Measurement Range:
Resistor:0.5 Ω-50MΩ
Capacitor:30pF-100mF
Inductance：0.01MH-10H
Working voltage: can use 6FF22 9V Battery, or For DC 5.5-12V via for DC socket.
Controller :ATmega168
Standby current: 0.02uA
Operating current: 25mA
