Author Topic: preenFM is going to Eurorack (Read 16715 times)

klangFM · « **on:** June 26, 2016, 03:30:23 PM »

Finshed my 3HE Eurorack version of this super FM synth.
It is 162mm or 32TE and 40mm deep.
Frontpanel is available in dxf - format on request.
Further info at my site: www. klangbauKöln.de

best
willi

Xavier · « **Reply #1 on:** June 27, 2016, 11:23:58 PM »

Very nice.. Congrats for your project.

Next step is to add some analogue input usable as source in the matrix

Xavier

klangFM · « **Reply #2 on:** June 28, 2016, 11:32:58 AM »

Fine Xavier,
after you opening a few ports for analog in, I cut associated holes in the frontpanel.
Good idea?

best

willi
www.klangbauköln.de

solipsvs · « **Reply #3 on:** June 30, 2016, 02:25:38 AM »

Quote from: Xavier on June 27, 2016, 11:23:58 PM

Very nice.. Congrats for your project.

Next step is to add some analogue input usable as source in the matrix

Xavier

you wont

but if you do... there are no words to describe how awesome that could be

Xavier · « **Reply #4 on:** July 03, 2016, 10:04:07 PM »

That"s was the P3 connector was for

But its pins required 0-3.3V input.
I currently need more hours per day.

Could be a good project for a DIY enthusiast. Anyone ?

lokki · « **Reply #5 on:** July 09, 2016, 12:30:25 AM »

yep, maybe. so basically we just need to scale the 0-10v control voltage to 0-3.3v and you open the ports and add support for the analog input in the matrix?

this would be super awesome! scaling the cv should not be hard.

Xavier · « **Reply #6 on:** July 09, 2016, 09:23:46 AM »

Yes, I've never dug the idea but that's how i see it.
You must add a protection to be sure the voltage never exceed 3.3V or it will damage the MCU.

Xavier

lokki · « **Reply #7 on:** July 09, 2016, 10:45:45 AM »

yep. so i will try to come up with something and post the schematic. i will use it with 0-5v signals, but the general principle will be the same.

lokki · « **Reply #8 on:** July 09, 2016, 11:30:32 AM »

xavier, how high would the samplerate of the adc with your firmware approximately be? could we also theoretically input audio-rate signals?

cheers

Xavier · « **Reply #9 on:** July 11, 2016, 09:24:10 PM »

The Matrix is updated every 32 samples.
No need to read the ADC more often.

Xavier

klangFM · « **Reply #10 on:** February 12, 2017, 04:24:50 PM »

Nice to read this.
I is more concret to open the gates for CV in?
It would be nice to open 2 input for 2CV and Gate/Trigger signals to use it in "Matrix".
I don´t know how a Gate could to be implemented. At first it make sense for me.
To scale voltes down to 3,3V I can try it to do.
willi

Xavier · « **Reply #11 on:** February 13, 2017, 12:03:42 AM »

I'm away from my computer still for 8 days.
Have a look at this post :
http://ixox.fr/forum/index.php?topic=69235.msg72051#msg72051

klangFM · « **Reply #12 on:** February 15, 2017, 05:39:04 PM »

Thanks,
who can compile me this github stuff: acdcIN?
I'am analog.
Question: AD controll range is 0-3.3V. For a scaling opamp one use an inverting desing and output is 3,3V to V.
Therefore it is better to invert input range in acdcIn firmware.
Possible?
As far I get a compiled version I test it and draw a little schematic with board.

willi

lokki · « **Reply #13 on:** February 15, 2017, 09:46:29 PM »

i can compile the firmware for you if no one else does :-)

lokki · « **Reply #14 on:** February 15, 2017, 09:57:12 PM »

xavier i get this when i try to compile the adc branch:

build/PreenFM_irq.o: In function `TIM2_IRQHandler':
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_irq.c:236: undefined reference to `TIM_ClearITPendingBit'
build/PreenFM_init.o: In function `ADC_Config()':
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:137: undefined reference to `TIM_TimeBaseStructInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:144: undefined reference to `TIM_TimeBaseInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:145: undefined reference to `TIM_SelectOutputTrigger'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:146: undefined reference to `TIM_ITConfig'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:167: undefined reference to `DMA_StructInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:186: undefined reference to `DMA_Init'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:187: undefined reference to `DMA_Cmd'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:190: undefined reference to `ADC_StructInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:191: undefined reference to `ADC_CommonStructInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:194: undefined reference to `ADC_Cmd'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:195: undefined reference to `ADC_DeInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:205: undefined reference to `ADC_CommonInit'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:215: undefined reference to `ADC_Init'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:219: undefined reference to `ADC_RegularChannelConfig'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:220: undefined reference to `ADC_RegularChannelConfig'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:221: undefined reference to `ADC_RegularChannelConfig'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:222: undefined reference to `ADC_RegularChannelConfig'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:225: undefined reference to `ADC_DMARequestAfterLastTransferCmd'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:228: undefined reference to `ADC_DMACmd'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:231: undefined reference to `ADC_Cmd'
/home/lokki/Downloads/preenfm2-adcIn/src/PreenFM_init.c:234: undefined reference to `TIM_Cmd'
collect2: error: ld returned 1 exit status
Makefile:247: recipe for target 'build/p2_2.06o.elf' failed

preenfm Forum

News: