Nice little component tester kit.

Status
Not open for further replies.

Nigel Goodwin

Super Moderator
Most Helpful Member
Someone brought this kit to my attention a couple of weeks ago, so I ordered one (as it's was crazily cheap - £7.45 )

https://www.banggood.com/DIY-Meter-...ntent=vera&emst=2NKh40Be80_237878_1013964_129

It came this morning, so I've put it together and it works great - it uses an ATMega, and not a great deal else really - the test transistor in the picture is a BC107. All the details are in the web link above, scroll down to the reviews for a link to the instructions and circuit.


 
I have one similar it uses an atmel, really usefull and it tells you gate capacitance on fets.
The only thing with them is that theres no protection so you have to make sure caps are disharged.
I use mine when I cant be bothered to look up tranny pinouts.
 
dr pepper said:
I have one similar it uses an atmel.
Click to expand...

An AVMega is an Atmel AVR processor, and presumably what yours uses? (it lists various ones you can use in the link on the website, with the larger ones having space for more facilities).
 
Yes.
But I dont mess with atmel, so I dont know much about this one, 'cept it works well.
 
I ordered one for the convenience factor.....
I have a component analyzer that requires booting a PC and graphing the component, but....that's more for production and QC.
I like a tool that can quickly eval a component and some specs when prototyping.
Thanks for finding it Nigel.
 
I've had a similar one for a month or so - quite a nice little bit of kit for the price.

One modification though is to replace the cheap zener reference often found on these with a precision voltage reference. I'll try and find the thread I found on further firmware and hardware modifications from the person who designed it in the first place before the Chinese "adopted" it.
 
picbits said:
One modification though is to replace the cheap zener reference often found on these with a precision voltage reference.
Click to expand...

It's already got one, if you check the link above it has a link in the reviews at the bottom to an article about it, including the schematic and suggestions.
 
Ahh I was lazy and bought the ready built kit (from Banggood as well !)
I stumbled across the above thread that I linked to and spent a couple of days reading through the many pages. How the original designer managed to utilise the functions of the AVR in places was quite ingenious
 
I built a cap/inductance meter with a pic16f628, its in a similar plastic box to the comp tester, it too is a really usefull tool, and surprisingly accurate.
Any serious hobbyist should have these 2 instruments, the same ones that sell the comp test usually sell a cap/choke meter as well.

PS I've had my comp test 2 years on the same pp3, and its had reasonable use, so standby and run curret must be low.
 
Thanks for the link Nigel.

I bought 6 items online at this site all costing me less than one item would cost me in South Africa. Now I just hope I can trust the South African postal service to deliver.
 
Just finished assembling & gone over board checking placement of parts. On powering up, only get the LED & backlight to work nothing on the screen. Checked the 2 electrolytics, one has 9v & the other 5v. Any sugestions where ive gone wrong.
 
Have you adjusted the preset? If the LCD is powered you should at least see squares when the preset is adjusted.

Mike.
 
Thanks for that tip, had no idea what that preset was for. Very happy now.[ Bit of a trap that, if the preset is in the mid position the screen is completely blank.]
 
Last edited:
Ordered it and other toys last night.
Not sure it will do what I want but found cutting tools that might work as island cutters!
Very cheap to try. Ordered 2 6mm & 1 8mm. Less that a Euro for the 3.

Edit: They are perfect island cutters if you have a GOOD drill press.
 
Last edited:
Status
Not open for further replies.

Similar threads

  • Question
Amplify ALESIS Drum Kit Cymbal using TL082
Replies
19
Views
5K
td_drummer
T
A
  • Question
Help designing my own diode tester with decent drive circuitry
Replies
2
Views
2K
Nigel Goodwin
F
  • Question
Heatsink mounting kit for TO247?
Replies
6
Views
3K
shortbus=
S
S
  • Question
Selecting the right component values for comb generator.
Replies
5
Views
9K
JimB
G
  • Question
Why do we need these components?
Replies
4
Views
1K
gjoo
G
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…