Re: Fried hotend MOSFET - how to bypass?
Replacing tracks with wires is entirely fine. Some even do this without having tracks damaged to allow higher currents.
View ArticleRe: Fried hotend MOSFET - how to bypass?
Thanks for the answer. I tried to go around the problem by adding a direct 12V connection via a wire, but it doesn't work. Nothing happens with the hot end, it stays cool. The MOSFET isn't switching...
View Articlehow it works?
Hello, im wondering, how a driver board generally work. How does it synchronies the 4 steppers an drive them? I've tried to write a script wich synchronize them by using the least common multiplier....
View ArticleRe: need help to program sanguinolou
Thanks for that I have got the the gen7 in the right place and it has compiled sprinter. But now find the two chip I have will not program and I need too erase the chip! I have down loaded the 1284p...
View ArticleRe: need help to program sanguinolou
Erasing the chip is done every time you upload something. Maybe you simply miss the bootloader, quite some vendors upload firmware without bootloader, using an ICSP programmer. Parallel programmers...
View ArticleRe: Fried hotend MOSFET - how to bypass?
Check the signal pin. It should go to 5V. If not, you have to fix firmware and/or your ATmega chip.
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Re: Fried hotend MOSFET - how to bypass?
Alright. Thanks, nothing happens with any of the pins when I switch on the hot-end. I'll try with another MOSFET, but ultimately I think that the connections going to/from the MOSFET might be burnt...
View ArticleRe: how it works?
To get a synchonized movement you simply send a step pulse to each stepper at (almost) the same time. Like: for ( ; ; ) { set_x_step_high(); set_y_step_high(); delay_microseconds(2); // or do some...
View ArticleRe: Fried hotend MOSFET - how to bypass?
Quotefizzmannothing happens with any of the pins when I switch on the hot-end. I'll try with another MOSFET If there's no signal voltage it's entirely pointless to try more MOSFETs. Just like changing...
View ArticleRe: how it works?
Or you can get even more creative and put all the step lines on a single 8 bit port and tell all the ones you want to step at the same time by setting the apropriate bit pattern and writing that byte...
View ArticleRe: Fried hotend MOSFET - how to bypass?
Ok. Thank you. I will then buy a new board. And then I'll try to move the MOSFETs off the board. Feels more safe like that. I wish you a nice weekend.
View ArticleRe: Fried hotend MOSFET - how to bypass?
QuotefizzmanI will then buy a new board. How about fixing the signal trace? If you have a signal right in the ATmega pin but not on the MOSFET it shouldn't be too complicated to solder in a piece of...
View ArticleRe: Fried hotend MOSFET - how to bypass?
the mosfet parts where u soldier is gound Not 12volts. the heater 12V is direct from the powers supply the mosfet control the ground. back of board pin 1 signal pin2 direct to connector to heater pin3...
View Articleavrdude: stk500_getsync(): not in sync: resp=0xd7
I've got a Solidoodle [Sanguino - ATmega644P] and I've recently installed a new E3D hotend. I need to update the max temp but I can't for life of me, this entire day I've worked on it, actually upload...
View ArticleRe: avrdude: stk500_getsync(): not in sync: resp=0xd7
avrdude: stk500_getsync() is a communications error. It cant talk to the bootloader... maybe wrong baud rate (in boards.txt) or even no bootloader installed. Or just an issue with the auto reset...
View ArticleRe: avrdude: stk500_getsync(): not in sync: resp=0xd7
I'd rather just buy a new mobo than buy something to rig my older one. heck, maybe I'll grab another Megatronics V3. After getting that working it was wonderful. Getting it working was a journey going...
View ArticleRe: avrdude: stk500_getsync(): not in sync: resp=0xd7
If its a real 644p in a 40pin dip, you can get one of those preprogrammed and just replace yours. eg [www.emakershop.com] or [www.emakershop.com] etc (1284p is drop in replacement, with more ram and...
View ArticleRe: avrdude: stk500_getsync(): not in sync: resp=0xd7
and a avr programmer is a tool... anyone working with AVR chips should have one.
View ArticleRe: avrdude: stk500_getsync(): not in sync: resp=0xd7
Changing baud rates resulted in "avrdude: Yikes! Invalid device signature. Double check connections and try again, or use -F to override this check."
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Re: Fried hotend MOSFET - how to bypass?
Ok, thanks for this info, as you will see by both my explanation below and my soldering skills, I'm no expert in the electronics field. I hooked it up according to the pic below. v8ke.jpg Now there is...
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