$20 LCR ESR Transistor checker project

[stj]

did you calibrate it?

[Rudolf_h]

hi

Thanks for the software, problem view video

https://youtu.be/sUbec_VTAhI

I have two of these testers im using the firmware you have downloaded and it works fine what are the fuse settings your using? what programmer are you using for the re programming,

Flash and EEprom is ok, fuse not shure

[flywheelz]

@Rudolf_h,

Does the tester start automatically when you plug in battery?

[Rudolf_h]

did you calibrate it?

sry no ;.)

its work, but the hardwae must be bad

the led and the display is always on and the test buton and rotator not works 

[hapless]

Have you checked the button to make sure there is no short in it?

[stj]

button is not shorted or he would start in the menu mode

it was a kit - probably a resistor is in the wrong place or something.

[hapless]

He does start in menu mode. And ends with "Timeout!"

Edit: I agree though, it could be something other than the button, but I think it's a good place to start.

[flywheelz]

Maybe Atmega pin 13 always grounded by switch on NPN transistor.

Disconnect battery then check pin 1 and 2 for short in pic attached.

[vinceroger]

hi

Thanks for the software, problem view video

https://youtu.be/sUbec_VTAhI

I have two of these testers im using the firmware you have downloaded and it works fine what are the fuse settings your using? what programmer are you using for the re programming,

Flash and EEprom is ok, fuse not shure

in your fuse settings lockbits i did not put anything in this section just the first three like you have set already and in extended fuse i set mine to 0x04
Thre is a good picture and zoomable so you can check the resistor colours etc in this thread post 349
 http://www.badcaps.net/forum/showthread.php?t=50720&highlight=esr+tester&page=18
maybe worth double checking these are in the correct places too
u3 = tl431
q1 - 4673 (bc557c)
q2 - c945 (bc547)
q3 - c945 (bc547)

[Rudolf_h]

@Rudolf_h,

Does the tester start automatically when you plug in battery?

yes its start auto and is in a loop

transistor have i new and the start button has no bridge .. sorry bad english

https://www.youtube.com/watch?v=2H5j5LHh0Jc&feature=youtu.be

[vinceroger]

@Rudolf_h,

Does the tester start automatically when you plug in battery?

yes its start auto and is in a loop

transistor have i new and the start button has no bridge .. sorry bad english

https://www.youtube.com/watch?v=2H5j5LHh0Jc&feature=youtu.be

your video is set to private so we cant view it

[Rudolf_h]

@Rudolf_h,

Does the tester start automatically when you plug in battery?

yes its start auto and is in a loop

transistor have i new and the start button has no bridge .. sorry bad english

https://youtu.be/2H5j5LHh0Jc

the extendet is 0x04 ... xxxxx100 ignore the 5 bits

https://www.youtube.com/watch?v=2H5j5LHh0Jc&feature=youtu.be

your video is set to private so we cant view it

[Rudolf_h]

i have checkt resistor many times .. all ok and on the right place

no brocken or bridges copper 

now i have test pin 27 ( PC4 ) is always 2,5V on the pin

[madires]

PC4 is the external 2.5V voltage reference.

[Rudolf_h]

PC4 is the external 2.5V voltage reference.

sry my misstake wrong pin

when i press the test button must go pin 13 ( u1-13 ) to gnd ? is 0,6V presst or no presst test button

[madires]

PD7 (pin 13) is pulled up by a 27k resistor, when the push button isn't pressed. When you press the push button, a transistor pulls down PD7 to gound.

[vinceroger]

PD7 (pin 13) is pulled up by a 27k resistor, when the push button isn't pressed. When you press the push button, a transistor pulls down PD7 to gound.

can you upload a high resolution picture of your tester like in the link in the thread i posted earlier we maybe able to spot something your missing.

[flywheelz]

He is getting 0.6v at pin 13 at all times which is wrong.  As madires said it should be about 5v when the push button isn't pressed.  Perhaps that Q3 is wrong transistor S9014 but for that tester you need c945 with different pinout? 

What part number of Q3?

[Rudolf_h]

He is getting 0.6v at pin 13 at all times which is wrong.  As madires said it should be about 5v when the push button isn't pressed.  Perhaps that Q3 is wrong transistor S9014 but for that tester you need c945 with different pinout? 

What part number of Q3?

first c945 and now bc547B


ok... i see ;-) 

original c945 
           BC547

in the GM328R stuffing list  q2& q3 - c945 ( bc547) !!



not pin compatible

[Rudolf_h]

PD7 (pin 13) is pulled up by a 27k resistor, when the push button isn't pressed. When you press the push button, a transistor pulls down PD7 to gound.

thats the problem, the is 0,6v presst or no presst 

[Rudolf_h]

PD7 (pin 13) is pulled up by a 27k resistor, when the push button isn't pressed. When you press the push button, a transistor pulls down PD7 to gound.

can you upload a high resolution picture of your tester like in the link in the thread i posted earlier we maybe able to spot something your missing.

[Rudolf_h]

He is getting 0.6v at pin 13 at all times which is wrong.  As madires said it should be about 5v when the push button isn't pressed.  Perhaps that Q3 is wrong transistor S9014 but for that tester you need c945 with different pinout? 

What part number of Q3?

Thanks to all ;.) 

its works now Perfekt ;-) 

Transitor wrong i insert original and now 

[flywheelz]

Good job Rudolf!  One more working tester for the team.   

[roli_bark]

I want to upgrade my AtMega328p-PU (the DIP part) to the latest repository 'madires' FW, but the part is locked.

- Can the ISP be used to completely erase a locked device ? Or, that a parallel HV programmer must be used ?
- I have the TL866 parallel programmer. How do I load it with both the *.hex & *eep files ?

TIA

[flywheelz]

I want to upgrade my AtMega328p-PU (the DIP part) to the latest repository 'madires' FW, but the part is locked.

- Can the ISP be used to completely erase a locked device ? Or, that a parallel HV programmer must be used ?
- I have the TL866 parallel programmer. How do I load it with both the *.hex & *eep files ?

TIA

Yes you can Erase and start fresh. 

I don't have any experience with TL866 but others here do.  Here is such a post.  Also I remember something about opening files as "intel".