ive ordered a driver”new firmware” from banggood
its onits way through the post
ive got a attiny25 in my hands
i took the attiny25 from one of lexels drivers that i hurt! 
long long story
i like bistroHD
is it possible to take off the attiny from this
and put the attiny25 in place of it
or im i going to kill the driver
i see the pinout is the same on the 13 and the 25
Technically not an unsolvable problem, but that driver uses only one channel while Bistro HD OTSM is flashed for 3 channels
so all that’s on Bistro 350-2100mA on Bistro is on Convoy 0-2.8A
single AMCs and FET channel have no effect, the mode groups are not really matching any useful driver behavior if you do it
That driver puts Pin 5 to ground, where Bistro outputs moonlight, so that pin needs to be lifted
Pin 7 resistor divider needs to be changed 1 and 3.3kOhm
Pyramid solder trick for adding diode and C2 from others, add C1 to battery voltage and ground, remove OTC
MCU is bigger, so you need to bend the legs below the body, just not leg 5
Its more useful to order a driver without MCU and MOSFET from me and put the 2 more expensive parts on it from the mechanical damaged board
hi lexel
its porberly better for me to orer a whole new driver (with spring and wires) if possible
ill send you a pm when my next salary comes to me as ive a few other bits and pieces to get for the home this time
give me a week or so and ill speak in pm again
other then that, thanks so much for your help
your driver took some stick from me and after ive unsoldered the tiny13 and fet and 7135s, cleaned it up . it looks like i could return it to its gloryious goodness again. after i find one of the resistors
but thats for a future project
again
thanks
chris
ATTiny25 is not necessarily bigger than ATTiny13, depends on which package you buy…
No need to bend legs if you purchase the correct one.
Its an 25V and 209mil size
I don’t doubt you used the larger one on his driver, but just letting the forum know that the ATTiny25 comes in various sizes and some are the same size as the ATTiny13. You have to pay attention when ordering as the differences are coded so slightly it’s easy to get one that doesn’t fit the board.
Yes use same size for 25V and 85 for compatibility