Elektronika.ba

I will be happy to provide you with pictures. And an instruction for Avrdude. Could you provide me (somewhere in the next few weeks) the following information? * what is the purpose of the angled 6 pins header on the front side? * On the mainpage there are 3 ways explained how the RTC chip could be ...

No problem. The biggest issue was my own impatience. I think a big help will be to add some files to the download: http://www.elektronika.ba/misc/warmtube_v2_main_assy.pdf http://www.elektronika.ba/forum/download/file.php?id=4672 Also a brief instruction how to program the Atmel with avrdude, with a...

@trax the soldering of the tlc chip, using the iron method, did go very well. And I am confident that the chip is mounted well. I did however made some bad decisions on the Mainboard. I mixed v1 and v2 up and had to desolder some parts. My guess is that I damaged the pcb. Fortunately I haven't insta...

I am considering to start over from scratch. I was testing the clock and turned the clock. The lower nixie dot started to light up. Moving the pcb back it went off again. When I test the voltage at the header pin and the resistor, the dot switches on. Touching the nixie dot itself makes no differenc...

Nevermind the CKOUT is in the low fuse. This value is correct. Time to fire up my multimeter

@trax thank you for being so patient with me

Edit: I noticed the mark on the leds. They are all pointing bottom left (opto coupler and two resistors side)

I noticed something strange in the output of Avrdude: avrdude: safemode: lfuse reads as 96 avrdude: safemode: hfuse reads as D9 avrdude: safemode: efuse reads as 5 avrdude: safemode: Fuses OK (H:05, E:D9, L:96) The values hfuse and efuse are switched. Very strange. I programmed efuse as 05 (should b...

The marking was hardly visible on the image, so I placed a red dot (it is on the inside)

I think I am ok with the placement of the TLC chip

Now I have to find out why the led's won't turn on, and the upper nixie dot keeps stays on.

I checked the two transistors. The base of both are connected to the right pin of the Atmel with 10k resistance. The emitters both have zero resistance to ground. And the collectors zero resistance to the right female header pin. I found a more disturbing issue however. The TLC chip has a dot for th...

Waited too long too edit. When I power on the lower nixie dot switches on for a second and then off, the upper stays on. Is this the correct behaviour?

@trax after your comment that the Atmel was not programmed right, I reprogrammed the Atmel (using the same procedure as last time). After reinstalling one nixie dot came alive. And yes 200V! As I also found out after removing the powerplug :ohno: :D Now I have to investigate further because the leds...

You probably didn't program the AVR properly :shock: FYI: check the last two pages of this old assembly manual: http://www.elektronika.ba/misc/main_board_v1.pdf (it is for older version, but you can still read it) Regards! I flashed the Atmel with the firmware wt2_IN14_shield.hex from the folder 31...

According to your description the mosfet is placed right. The bridged side has a diode next to it, and the other end (the two seperate legs) pointing in the direction of the speaker (the Atmel side)

What (voltage) values should the mosfet have?

Sorry for late reply. It is normal that LEDs on shield PCB blink on startup, it happens the same on my clock. No problem at all, I really appreciate your help! I have time this evening to check values of the mosfet (and the solder the smd jumper). To check the direction of the mosfet: the mosfet ha...

Sorry for another post. I wasn't able to edit the previous one.

I flashed the Avr with the firmware from folder 31d-08m-2015y

I assumed I had to solder two 4k7 resistors here too (this part was undocumented as well):

Sorry for spamming this forum :-) I made some progress with the Avr programming: * I got the Usbasp programmer working. It turned out that the connections on the flatcable are mirrored, and only one of the three grounds pins is connected. I also added a crystal to the breadboard. * I found a forum t...

Unfortunately no luck :-( I did the following tests: * 3v battery to ground: 3v ok * 5v checks all ok * Voltage between IC2 and C14 (Test 3) strange --> 10 Volts (without Atmel and HV chip) * HV check not ok, also 10 Volts (with all IC's) Does this have anything to do with the fuses on the avr, or t...

paste this option string into your avrdude command line. You may specify multiple -U arguments within one call of avrdude. Thank you! that was very helpful. I used this command to program: sudo avrdude -P /dev/ttyUSB0 -c arduino -p m328p -v -e -U lfuse:w:0x96:m -U hfuse:w:0xd9:m -U efuse:w:0xfd:m I...

@trax thank you for the reply! I tried lots of different combinations. The returned id does not exist. I suspect the USBasp device is broken. I had more luck with my Arduino uno. I connected the 328P, using the 6pins ICSP header, and Arduino-isp I added two extra wires to the 328P: 1x 5v to pin20 an...

I am currently stuck at programming the Atmel. To program I bought an usbasp device with a 10 pins flat cable. It also had a program board with a zif socket which is too wide, so the 328p doesn't fit in. Therefore I made a programmer board, using this circuit http://www.learningaboutelectronics.com/...

Thank you for the image!!!

I ordered the smd parts (and waiting for the opto couplers and usb programmer from china).