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

Author: 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
Author: John Maverick (Guest)
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An 8Mhz crystal solved the problem!


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