Forum: µC & Digital Electronics GM328 transistor tester MCU firmware update

von John M. (sdancer75)

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I bought a GM328 transistor tester that can't be calibrated. It stucks 
at the "short probes" stage. Anyway, I decided to update the MCU 

I connected the ATMega328pu to my breadboard and I double checked the 
connections with my DMM. The AVRdude always return the following error :
D:\temp\GM328\EN>avrdude -pm328p -cUSBasp -B4 -Pusb

avrdude: set SCK frequency to 187500 Hz
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: error: programm enable: target doesn't answer. 1
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.

avrdude done.  Thank you.

I even tried to connect an external crystal but without luck. What seems 
to be wrong here? My OS is Win10/64Bit and AVRdude is v5.10


: Moved by Moderator
von John Maverick (Guest)

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An 8Mhz crystal solved the problem!

von setio wibowo (Guest)

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i have gm328a which can no longer detect diodes.
I decided to buy atmega328p, with Extrim Burner AVR, USBasp and minimum 
system with xtal 8Mhz managed to flash Atmega328p. But after installing 
it has no function, the screen is dark.
what is wrong with my work?
please show me step by step to be successful.


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