Author Topic: preenFM is going to Eurorack  (Read 1929 times)

klangFM

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preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

alien_brain

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Re: preenFM is going to Eurorack
« Reply #3 on: June 30, 2016, 02:25:38 AM »

Very nice.. Congrats for your project.

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

Xavier

you wont  :P

but if you do...  there are no words to describe how awesome that could be
« Last Edit: June 30, 2016, 02:27:24 AM by alien_brain »

Xavier

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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
« Last Edit: February 12, 2017, 05:06:57 PM by klangFM »

Xavier

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« 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

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Re: preenFM is going to Eurorack
« Reply #13 on: February 15, 2017, 09:46:29 PM »
i can compile the firmware for you if no one else does :-)

lokki

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Re: preenFM is going to Eurorack
« 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