Projecttitel: Buchla 218R 218P Clone
Manufacture link: https://electricmusicstore.com/blogs/build/touch-activated-voltage-source-model-218
Buchla is a company and own the Trademark "Buchla"
visit https://buchla.com/ if you want the original Easel and 208/218 modules
This website is only for private usage and for documentation.
The 218 clone is available from Samodular.com as 218s and EMS Store 218R (R=Roman)
218s this is soon available in a improved version also from samodular.com
I built the 218R from an old kit for a friend, some experience and docs are here to have an backup and knowledge transfer:
the 218R is black/silver
the 218s is blue,red
the new upcoming versions of the 218s use an ARM STM32 directly on the pcb, no additional pcb.
latest Firmware from EMS website: B218-v2.0.hex
connect the ribbon cable to the STlink v2 programmer and connect a PC to the programmer by usb.
start the STM programmer tool
power on the 218R
try to make an connection in the STM Utility software and upload the data by the function: "program&verify"
after you have done this, the connection will be lost ! that's ok. (on bottom you can see the error message after the programming) - but you need to respect the log entry before the error message started - which says: "programmed in 1s and 430ms" that's what we want.
just disconnect and restart the 218R and perform the compare function - which reads the memory of the 218R and the computer it with the content of the hex file.
The heart an STM32, not perfect here - the decoupling caps are far away from close to the chip.