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Messages - modoran

3
Project logs / Re: Really universal soldering controller
Q1 broken, happened to me also, BE jonction was gone. A direct short CE with FZT605 removed for testing purposes works also.

I don't think D5 has anything to do with this fault.  It will work without it if needed.

In your measurements there is no way to have 35,6V base voltage and 3,6V emiter voltage in a working transistor. Replace it without thinking.
5
Project logs / Re: Really universal soldering controller
Even a direct short on D+/D- pins to miniusb port will work, no even need for the ADUM part at all if you are not interested in galvanic isolation.  Many products does not contain an galvanic isolator chip at all.
6
Project logs / Re: Really universal soldering controller
In the file menu.c, function MenuTasks(), beginning with line 386, replace original code:
Code: [Select]
if(!B1){BTicks[0].n = 0;BTicks[0].d = 0;}
                if(!B2){BTicks[1].n = 0;BTicks[1].d = 0;}
                if(!B3){BTicks[2].n = 0;BTicks[2].d = 0;}

with:

Code: [Select]
if(!B3){BTicks[0].n = 0;BTicks[0].d = 0;}
                if(!B2){BTicks[1].n = 0;BTicks[1].d = 0;}
                if(!B1){BTicks[2].n = 0;BTicks[2].d = 0;}

I done that change some time ago.
8
Project logs / Re: Really universal soldering controller
lm2675 has an extremely simple application circuit, if it does not work most likely it is a fake chip, do not buy it from aliexpress, only buy from mouser, digikey or farnell, it is expensive, but otherwise you will lose money, time and frustation.
10
Project logs / Re: Really universal soldering controller
Does not support T470 tips at all ( as far as I know these requires 40V to drive at max power, this stations delivers 24V and 6A max ).   It supports JBC tweezers or if you like 2 handles at the same, but only if you want the same temperature for both.
13
Project logs / Re: Really universal soldering controller
[quote author="salavat"]


1) If I can load firmware successfully (that is what eeprom U8 for - right?) - that means eeprom is OK.
[/quote]


No, it is not.  Firmware is loaded inside PIC32 microcontroller, not inside U8.  You can load firmware successfully even without U8 at all.

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