Re: Burning Sanguino bootloader onto 1284p onboard using arduino mega
Robochef your blog looks Good, the same way I have processed for my sanguinololu 1.3a before some days back and modified the sanguinololu's design according to the Crystal and 22pF capacitors can sit...
View ArticleSanguinololu 1.3a 1284p - no power at heatbed.
Hi. Im new in 3d printing and im trying to finish my mendel Prusa with Sanguinololu 1.3a and i have a problem. There is no power at heatbed. I measured power on hot-end - there is normal 12V. When i...
View ArticleRe: Sanguinololu 1.3a 1284p - no power at heatbed.
You gave us very little information. It's hard to even guess what's going on. But most likely you have something misconfigured in the firmware (pin layout, thermistor type) or some wiring issue.
View ArticleRe: Can Sanguinololu 1.3A control 12V 200W heated bed ?
> They changed the MOSFET to SMT versions capable of 76A drain current. This means nothing. The issue is not how much current can the mosfet handle, but rather how much heat it dissipates doing...
View ArticleRe: Sanguinololu 1.3a 1284p - no power at heatbed.
Thanks for your reply. I had uploaded marlin from 3 different sources and tried to heat the bed. Every time there is 0V on Sanguinololu pins. When i plug the heatbed to the extruder connector it get...
View ArticleRe: Sanguinololu 1.3a 1284p - no power at heatbed.
Thermistor pin: TEMP_BED_PIN 6 Heater pin: HEATER_BED_PIN 12 Things to check: - make sure the temperature is reported correctly (should be same as hotend at room temp) - make sure the gate pin is set...
View ArticleRe: Sanguinololu 1.3a 1284p - no power at heatbed.
Agin thanks for Your reply. The pins are set right in Marlin. The temperature shown in pronterface is the same as room temp (T.25.0) Now i would like to apologize for my lame... but in not good in...
View ArticleRe: Sanguinololu 1.3a 1284p - no power at heatbed.
Problem solved. MOSFET wasn't an issue. The uploaded software was an issue (i think?). Honestly i realy dont know what was the problem 8-). After several uploads of Marlin it started to work.
View ArticleRe: prevent usb 5V backfeeding
Hi guysoft, I have tried both, connecting the reprap directly to the raspberry pi and via the hub to the raspberry pi using the customized usb connector, and both worked. However, right now I am using...
View ArticleRe: prevent usb 5V backfeeding
Well, maybe that wasn't mentioned in the original post, but of course the ground pins need to be connected. Only V+/5V is disconnected. See attached pictures (the red wire is only used as a pointer in...
View ArticleVerification failure after upload?
Hey everyone, I built up a Sanguinololu completely from scratch. It seems that almost everything is working. I can compile a small test program and upload it with avrdude. Everything works correctly...
View ArticleRe: Verification failure after upload?
The error means that you have the wrong bootloader. The firmware is not actually uploading (hence the error). You need to burn the correct bootloader onto the atmega using the ISP port.
View ArticleRe: Verification failure after upload?
Well, do you have a bootloader at all? Factory fresh ATmegas don't. You'd need a programming device to upload one.
View ArticleRe: Verification failure after upload?
Ok, I did mess with the bootloader earlier. It seems pretty likely that I messed it up. I'll have to try burning it again.
View ArticleRe: prevent usb 5V backfeeding
Drastic as it sounds, I would just cut the +5V trace on the board. There is absolutely no reason for the sanguino to be powering to usb line. Cutting the trace takes 2 seconds with a pocket knife and...
View ArticleRe: Verification failure after upload?
So I had a usb245r chip lying around, and I tried to flash the bootloader with the "ft245r" programmer. Unlocking the chip with the following command seems to work: avrdude -patmega1284p -cft245r...
View ArticleRe: Verification failure after upload?
QuoteAm I correct in assuming that this chip is toast? No. As long as you get any results at all, the chip runs. Also, ATmegas are pretty hard to destroy, even attaching 12V to an I/O pin destroys...
View ArticleRe: Verification failure after upload?
Wait, that was an attempt to load the bootloader, not a firmware. So it seems to be failing validation of the first bit of the bootloader? Am I doing something wrong for loading a bootloader somehow?
View ArticleRe: prevent usb 5V backfeeding
lajos, I would have cut the +5 trace to the USB port, but it definitely went somewhere else as well so I would've had to cut two traces and then run a bypass wire and that is definitely more than 2...
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