Matrix user forums

I think the 4052 may be being driven into SCR lock up on power up.
http://www.matrixmultimedia.com/mmforum ... =2&t=10953

Hi John, I hadn't seen that thread. Interesting! Thank you. :) On my board it's the 4052 which first gets hot followed by the regulator (due to the excessive current drawn by the 4052) I've found that removing BR1 (the full bridge) and replacing it instead with one diode has completely eliminated th...

Hi David, Thanks, this is puzzling as I'm pretty certain that wasn't the original assembly course I ordered... I'm now wondering whether it may have been someone elses. As the whole package came together with the MK3 dev board (and I think a C primer as well) Did the late John Becker work for Matrix...

Hi all. :) I'm having an odd problem with my Mk3 development board. I wonder if anyone can shed some light? On my board, U3 (the CD4052 analogue mux) will on most occassions become very hot immediately after applying external power through the PSU-jack socket. J29 is correctly set to PSU operation a...

Oops - sorry John! For some reason I'd assumed you did work for Matrix. My apologies and thank you very much for the links. All I can seem to find is flow code everywhere!

All the best,

Chris

Hi John, Thank you for that. Downloaded USB driver and installed. I'm guessing I need "ppp" as well? Is that a download (assuming I can not locate my original disk which came with the board) or is that available as a separate purchase from yourselves? If so, where? Do you still sell the assembler yo...

Hi, Two questions: I have a devlopment board Mk3 (HP-488-00-3) purchased long ago from yourselves with, I think C and Assembler at the same time. Both long lost after several house moves. 1) From where can I download the USB drivers for the board? The onboard chip has a label stating PPP firmware bu...