Author Topic: this looks totally useful... and CHEAP!!  (Read 58961 times)

Hemmel

Re: this looks totally useful... and CHEAP!!
« Reply #40 on: August 01, 2014, 09:29:06 AM »
Just bought it. Karbo's screenshots got me ! ;)
B.

armdnrdy

Re: this looks totally useful... and CHEAP!!
« Reply #41 on: August 01, 2014, 09:31:38 AM »
Or maybe someone can reprogram for GE leakage..... :icon_wink:
I just designed a new fuzz circuit! It almost sounds a little different than the last fifty fuzz circuits I designed! ;)

karbomusic

Re: this looks totally useful... and CHEAP!!
« Reply #42 on: August 01, 2014, 09:32:50 AM »
Or maybe someone can reprogram for GE leakage..... :icon_wink:

I know I thought the same thing!

armdnrdy

Re: this looks totally useful... and CHEAP!!
« Reply #43 on: August 01, 2014, 09:45:42 AM »
A couple more questions:

What is that thing to the right of the display?

I'm thinking about housing one of these in an ABS enclosure. If I'm interpreting what I see correctly, there are only three "test" pins, with pin #1 being duplicated for orientation, and for lead spacing. Is this correct?
I just designed a new fuzz circuit! It almost sounds a little different than the last fifty fuzz circuits I designed! ;)

karbomusic

Re: this looks totally useful... and CHEAP!!
« Reply #44 on: August 01, 2014, 09:59:42 AM »
A couple more questions:

What is that thing to the right of the display?

I'm thinking about housing one of these in an ABS enclosure. If I'm interpreting what I see correctly, there are only three "test" pins, with pin #1 being duplicated for orientation, and for lead spacing. Is this correct?

Yes I think that is correct on the pins, if you note the number lettering on the PCB, I think that is an accurate depiction of pins. Here is a side view as well, that "thing to the right" is part of the LCD but recessed just enough for possible mounting:


armdnrdy

Re: this looks totally useful... and CHEAP!!
« Reply #45 on: August 01, 2014, 10:16:22 AM »
Thanks for that.

In the other images it looked like that "thing' was sticking up a bit.

So...it looks doable.
I just designed a new fuzz circuit! It almost sounds a little different than the last fifty fuzz circuits I designed! ;)

duck_arse

Re: this looks totally useful... and CHEAP!!
« Reply #46 on: August 01, 2014, 10:18:07 AM »
hemmel - is this wot you were really looking for? it was what I was thinking of, but not finding.

owners of - are the pads next/right to the ZIF socket for SMD testing?
"Remember the words - very simple - It'll start getting cooler, Bob, you just watch. I'm confused, Bob, I misunderstood the answer, probably. I don't think scientists know Felisha, Bob. I'll be the best judge of that, Bob."

karbomusic

Re: this looks totally useful... and CHEAP!!
« Reply #47 on: August 01, 2014, 10:20:44 AM »


owners of - are the pads next/right to the ZIF socket for SMD testing?

Possibly, good call since I thought it was for calibration but I think you may be right. Also if you note the translated instructions I posted in my first reply yesterday there may be some additional clues.

armdnrdy

Re: this looks totally useful... and CHEAP!!
« Reply #48 on: August 01, 2014, 10:25:53 AM »
I've read on other versions of this tester that these pads are for testing SMD.
I just designed a new fuzz circuit! It almost sounds a little different than the last fifty fuzz circuits I designed! ;)

Hemmel

Re: this looks totally useful... and CHEAP!!
« Reply #49 on: August 01, 2014, 10:29:35 AM »
hemmel - is this wot you were really looking for? it was what I was thinking of, but not finding.


I was looking for the small LED volt-meter and you provided Rob's link (thanks!).
karbomusic's pics got me interested just today.
B.

GibsonGM

  • more
  • Awesome!
  • *****
  • Posts: 5662
  • Total likes: 813
  • Mike Parker (aka. Guitar Mike, Parks, etc)
Re: this looks totally useful... and CHEAP!!
« Reply #50 on: August 01, 2014, 07:54:26 PM »
Holy crow!!  I ordered mine on 7/22 also, and it came today!  I am pretty surprised and pleased by this thing...I've had a bunch of inductors lying around, with no (easy) way to determine their value.....this little bugger came thru.  I tested the accuracy against a known inductor, and it is very close (within a few %, it seems).   Same for resistances and cap values.

The 3 pads to the R of the test jack seem to be for SMD, yes.  You can hold a cap over the 1&3 pad and take a reading, ha ha.

I wonder if this can be used to match FETs?

Well worth $20, IMO.
MXR Dist +, TS9/808, Easyvibe, Big Muff Pi, Blues Breaker, Guv'nor.  MOSFace, MOS Boost,  BJT boosts - LPB-2, buffers, Phuncgnosis, FF, Orange Sunshine & others, Bazz Fuss, Tonemender, Little Gem, Orange Squeezer, Ruby Tuby, filters, octaves, trems...

karbomusic

Re: this looks totally useful... and CHEAP!!
« Reply #51 on: August 01, 2014, 09:56:39 PM »
Holy crow!!  I ordered mine on 7/22 also, and it came today! 

YAY!

Yes I agree, so far a no-brainer at that price.

GibsonGM

  • more
  • Awesome!
  • *****
  • Posts: 5662
  • Total likes: 813
  • Mike Parker (aka. Guitar Mike, Parks, etc)
Re: this looks totally useful... and CHEAP!!
« Reply #52 on: August 02, 2014, 09:27:18 AM »
I did some comparisons between this and my more expensive DMM....they agree pretty closely.  Maybe a couple nF discrepancy as was suggested, but resistance matched down to 10ths of ohms.   I like the ESR feature...
MXR Dist +, TS9/808, Easyvibe, Big Muff Pi, Blues Breaker, Guv'nor.  MOSFace, MOS Boost,  BJT boosts - LPB-2, buffers, Phuncgnosis, FF, Orange Sunshine & others, Bazz Fuss, Tonemender, Little Gem, Orange Squeezer, Ruby Tuby, filters, octaves, trems...

Ripdivot

Re: this looks totally useful... and CHEAP!!
« Reply #53 on: August 02, 2014, 10:50:02 AM »
A couple more questions:

What is that thing to the right of the display?

I'm thinking about housing one of these in an ABS enclosure. If I'm interpreting what I see correctly, there are only three "test" pins, with pin #1 being duplicated for orientation, and for lead spacing. Is this correct?

Yes I think that is correct on the pins, if you note the number lettering on the PCB, I think that is an accurate depiction of pins. Here is a side view as well, that "thing to the right" is part of the LCD but recessed just enough for possible mounting:



Does it test JFETs or only mosfets? I've been reading about them but can't find anything about JFET testing.

Ripdivot


armdnrdy

Re: this looks totally useful... and CHEAP!!
« Reply #55 on: August 02, 2014, 11:36:30 AM »
This is what is written in the description of the tester linked on the first page of this thread:

Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.

This is the same tester with the green LCD back lit display and the yellow PC board shown in this thread.

Maybe someone who has received this tester already can confirm JFET testing.
« Last Edit: August 02, 2014, 11:39:32 AM by armdnrdy »
I just designed a new fuzz circuit! It almost sounds a little different than the last fifty fuzz circuits I designed! ;)

karbomusic

Re: this looks totally useful... and CHEAP!!
« Reply #56 on: August 02, 2014, 12:09:19 PM »
Does it test JFETs or only mosfets? I've been reading about them but can't find anything about JFET testing.


GibsonGM

  • more
  • Awesome!
  • *****
  • Posts: 5662
  • Total likes: 813
  • Mike Parker (aka. Guitar Mike, Parks, etc)
Re: this looks totally useful... and CHEAP!!
« Reply #57 on: August 02, 2014, 03:02:28 PM »
What I'd like to know is if you can match JFETs with that data.  Kind of an area I don't go that far into.....I just use the 2 voltage source + meter trick, but it takes time.

IOW, there is Vgs, but is I  the same as IDss?
« Last Edit: August 02, 2014, 03:05:06 PM by GibsonGM »
MXR Dist +, TS9/808, Easyvibe, Big Muff Pi, Blues Breaker, Guv'nor.  MOSFace, MOS Boost,  BJT boosts - LPB-2, buffers, Phuncgnosis, FF, Orange Sunshine & others, Bazz Fuss, Tonemender, Little Gem, Orange Squeezer, Ruby Tuby, filters, octaves, trems...

Ripdivot

Re: this looks totally useful... and CHEAP!!
« Reply #58 on: August 02, 2014, 04:24:16 PM »
Thanks for confirming that karbo.

karbomusic

Re: this looks totally useful... and CHEAP!!
« Reply #59 on: August 04, 2014, 12:03:48 PM »
Just a follow up....

I created a layout and soldered up an overdrive I was working on last night. I can't tell you how nice it was throwing each part in this thing before soldering. I usually like to measure each part before I commit it to the perf board so that I know its a good and correct part and it also just gives me a feel for the circuit as a whole; keeps the debugging down which is the main reason.

It was beautiful to grab a part, hit one button to see the real value, solder.   8)