老外的晶体管测试仪又更新了

xo304

31. With dialog function you can use a frequency measurement at port PD4 of the ATmega. The
resolution is 1 Hz for input frequencies above 25 kHz. For lower frequencies the resolution can
be up to 0:001 mHz by measuring the mean period.
32. With the dialog function and without the activated serial output a external voltage of up to
50V can be measured with the 10:1 voltage divider at the PC3 port. If the PLCC-Version of
the ATmega328 is used, one of the additional pins can be used for the voltage measurement
together with the serial output. If the zener diode measurement extension (DC-DC converter)
is assembled, the measurement of zener diodes is also possible with this function by pressing
the key.
33. With the dialog function a frequency output can be selected at the TP2 pin (PB2 Port of the
ATmega). Currently a preselection of frequencies from 1 Hz up to 2 MHz can be selected.
34. With the dialog function a xed frequency output with selectable pulse width can be activated
at the TP2 pin (PB2 port of the ATmega). The width can be enhanced with 1% by a short
key press or with 10% by a longer key press.
35. With the dialog function can be started a separated capacity measurement with ESR measure-
ment. Capacities from about 2F up to 50mF can most be measured in circuit, because only a
little measurement voltage of about 300mV is used. You should make shure, that all capacitors
have no residual charge before starting any measurement.
Thyristors and Triacs can only be detected, if the test current is above the holding current. Some
Thyristors and Triacs need as higher gate trigger current, than this Tester can deliver. The available
testing current is only about 6mA! Notice that many features can only be used with microcontroller
with enough program memory such as ATmega168. Only processors with at least 32k
ash memory
like ATmega328 or ATmega1284 can take all features.
Attention: Allways be shure to discharge capacitors before connecting them to the
Tester! The Tester may be damaged before you have switched it on. There is only a little protection
at the ATmega ports.
Extra causion is required if you try to test components mounted in a circuit. In either case the
equipment should be disconnected from power source and you should be shure, that no residual
voltage remains in the equipmen

xo304

功能眼花缭乱了,不追了.够用就行.

xo304

旋转编码器也用上了.选择菜单是方便了很多.

jkj

比以前的复杂了很多，功能要研究一下...

hp34401a

xo304 发表于 2014-12-1 00:06
TransistorTester with AVR microcontroller
and a little more
Version 1.11k

有否原始网页地址？

ccser

http://www.mikrocontroller.net/svnbrowser/transistortester/

这个应该是源网站，看看。

kirich

I also did a similar device. But I can not give here the link.
my version was better and more convenient

barons

看看哈

乐在其中110

看不懂这个。

rgzdb

越整越复杂。。。