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bought this tester kit http://www.ebay.com/itm/111990329664
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yes they are good for coils and transistors, i like how you can just plug one in and it gives you the info on them like gate voltage and type -
i have simple ESR tester, selfmade, but want to sort SMD transistors that i have much. search of needed one is hard thing
just cause its size.Comment
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I bought a similar one. I was surprised how good it was. Display always showed the same as every marked component I but in it. Not sure on inductance as I don't have anything to test with.Comment
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bought this kit. would like to probe how it works or no.
http://www.ebay.com/itm/BJT-Transist...EAAOSwstxU4XcQComment
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I have two types of testers. This one is somewhat the same as yours with a case. http://www.banggood.com/DIY-M12864-G...l?rmmds=search
It has issues were as it seems someone played with the character code for the mH symbol. I get a chines character H. LOL It works fine just annoying reminder of were it came from I guess. I like the Frequency Generator , PCM Generator and other facilities it has. Most handy . Instructions says you do not need to Calibrate every use if you leave the battery in the unit but I find I need to anyways. Just takes a minute shorting out the Inputs together let let it run until it ask for a Cap to test.
Also have this unit. http://www.banggood.com/LCR-T4-Mega3...l?rmmds=search
This one is super handy but without the Test Tones or Freq Generator. On arrival I had to put drop of Gorilla Glue behind the LCD as it was flopping around unsecured.
You can get them without the case super cheap. Note: On their Kits if they say Soldered or Welded it means all SMD Components have been installed.
BangGood has quite a selection of various models supper cheap. A DSO - 138 O scope can be had for like $20.00. , Ok not much of a scope but they work fine for most anything Audio and stuff. http://www.banggood.com/search/t4-esr-meter.html
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"I have a simple ESR tester, selfmade, but want to sort SMD transistors that I have many of."
I made up some special test probes so I could check SOT23 etc transistors. You need two small bits of Veroboard (perfboard, stripboard etc) , the solid undrilled tracks at the edge of the board. Or use some scrap of copper clad board. One probe has two 'tracks' on it, to probe on the side of the transistor with two legs, the other probe has just one 'track' . Wire three leads to the three 'tracks', and on the other end, use a header to plug into the tester ( a multimeter, in my case). Place the SOT23 device on a flat surface, and press the two probes onto the legs, so the tracks match up with the legs.
I will try and add a drawing/picture later.Comment
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These Contacts are to test SMD.Comment
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There has been another thread posted about these, here on geotech. All these Chinese clones are derived from here : http://www.mikrocontroller.net/artic...ansistortester
Get the manual with reference to the most uptodate firmware 1.17k, here : http://www.mikrocontroller.net/artic..._.28English.29Comment
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FF, i will answer to you here. i did not want to list all what i buy from chineses... if to be honest, but you inicialize meOriginally posted by FunfinderBattery Tester Circuit
[ATTACH]38832[/ATTACH]
[ATTACH]38833[/ATTACH]
With some luck you can draw some schematic from it and built it.
(btw. kt315, I did not follow any of your advices for these pix
the pictures were taken inside a room, macro-mode & flashlight)
LEDs shining red -> yellow -> green
2,4v red weak
3,6v red medium
4,8v red medium, yellow weak
6v red medium, yellow bright
7,2v red medium, yellow bright, green weak
8,4v red medium, yellow bright, green medium
The connection through the diode was connected with the device
and the push-button doesn't interrupts it. This is good because
batteries which are providing just some mA for LEDs look "full"
while reality might be totally different if they have to "work"
(when they have to provide something like 100 or 200 mA).
to reply.http://www.ebay.com/itm/291989971906...%3AMEBIDX%3AIT
you see - it cost 1.23USD.
i will report as it just arrive.
anyway thank you.Comment
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Originally posted by kt315 View Post
Buy the Three wire version of those if you can. With those you can only measure down to the required 3 or 4 volts depending on color. With the Three wire version you supply required working voltage and with third wire are able to measure 0vdc to upper limit..
http://www.banggood.com/MINI-DC-0-32...l?rmmds=searchComment
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Careful with the wires. If something happens to them you can't just put new ones on. No Access from the bottom of the board. You would need to remove the LED Display.
HFComment
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i will tell how to remake three wire version from the two wire as just i will get it.Originally posted by homefire View PostComment
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