ssm2044_pcb
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ssm2044_pcb [2009/01/17 15:09] – two typos nebula | ssm2044_pcb [2016/06/22 00:25] (current) – psykhaze | ||
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- | ==== Dual SSM 2044 VCF ==== | + | ====== Dual SSM 2044 VCF ====== |
- | [[SSM2044 PCB Bulk Order]] | + | [[http:// |
- | {{seppoman:ssm_small.gif? | + | **Warning:** This is not a suitable project for absolute beginners. The soldering isn't very difficult, but you will need either an AOUT_NG (SMT soldering required), an AOUT module (which needs to be expanded with the bipolar option) or two (!) AOUT_LC modules, or another type of CV source to control this module, in addition to the actual synth (SID/FM) you want to use it with. So a bit of soldering experience and knowledge about the MidiBox platform is definitely recommended. |
- | (click to enlarge) | + | {{seppoman: |
This PCB contains two of the famous SSM2044 24dB low pass filters with the necessary circuitry, additional LM13700 based Q linearization circuit and a tiny Omron micro relay for a software controlled (via gate out pins) bypass function. The layout is optimized for use with the [[aout_ng|AOUT_NG]] module, requiring the addition of a bipolar option when used with regular V/Oct sources like the original AOUT module. | This PCB contains two of the famous SSM2044 24dB low pass filters with the necessary circuitry, additional LM13700 based Q linearization circuit and a tiny Omron micro relay for a software controlled (via gate out pins) bypass function. The layout is optimized for use with the [[aout_ng|AOUT_NG]] module, requiring the addition of a bipolar option when used with regular V/Oct sources like the original AOUT module. | ||
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{{seppoman: | {{seppoman: | ||
- | My current test setup, a MBSID V2 ([[wilba_mb_6582|MB-6582 base PCB]]) with 6581 SIDs and an [[aout_ng|AOUT_NG]]. | + | My prototyping |
Here's a short audio demo: [[http:// | Here's a short audio demo: [[http:// | ||
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TK made a very nice audio demo, too: [[http:// | TK made a very nice audio demo, too: [[http:// | ||
+ | |||
+ | ==== Layout and Schematic ==== | ||
+ | |||
+ | {{seppoman: | ||
+ | |||
+ | (click to enlarge) | ||
+ | |||
+ | {{seppoman: | ||
==== Parts List ==== | ==== Parts List ==== | ||
- | |Part | + | |Part |
- | | | + | | |
- | |C1, | + | |C1, |
- | |C3, | + | |C3, |
- | |C5-C12 | + | |C5-C12 |
- | |C13, | + | |C13, |
- | |C15-C18 | + | |C15-C18 |
- | |C19-C24 | + | |C19-C24 |
- | |C25, | + | |C25, |
- | |D1 | + | |D1 |
- | |IC1, | + | |IC1, |
- | |IC3 |LM13700 | + | |IC3 |LM13700 |
- | |IC4 |TL072P | + | |IC4 |TL072P |
- | |K1 | + | |K1 |
- | |P1, | + | |P1, |
- | |P3, | + | |P3, |
- | |R1-R6 | + | |R1-R6 |
- | |R7-R13 | + | |R7-R13 |
- | |R14, | + | |R14, |
- | |R16, | + | |R16, |
- | |R18, | + | |R18, |
- | |R20,21 |47k | + | |R20,R21,R24-R27|47k |
- | |R22, | + | |R22, |
- | |R24-R27 | + | |R28, |
- | |R28, | + | |T1 |
- | |T1 | + | |
- | Total cost of all parts (without SSMs): about 13 Euros | + | Total cost of all parts (without SSMs): about 11.50 Euros |
+ | |||
+ | nILS did a Reichelt [[https:// | ||
==== Design ==== | ==== Design ==== | ||
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==== Bypass Relay ==== | ==== Bypass Relay ==== | ||
- | The " | + | The " |
+ | |||
+ | If you don't need this function, you can also solder two bridges instead of the relay (as shown below) and leave out R7, D1 and T1. That' | ||
- | If you don't need this function, you can also solder two bridges instead of the relay and leave out R7, D1 and T1. | + | {{seppoman: |
The Omron G6K-2P relay is available at several common places like Mouser, Digikey, Reichelt etc, but is a bit on the expensive side. If space is no issue, you could also use some short wires to solder in a different larger/ | The Omron G6K-2P relay is available at several common places like Mouser, Digikey, Reichelt etc, but is a bit on the expensive side. If space is no issue, you could also use some short wires to solder in a different larger/ | ||
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==== Calibration ==== | ==== Calibration ==== | ||
- | (These instructions are for MBSID V2 in combination with an [[aout_ng|AOUT_NG]], instructions for other AOUT versions will be provided later). | + | (These instructions are for MBSID V2 in combination with an [[aout_ng|AOUT_NG]]). |
For MBSID, the standard channel assignment is CV1 and CV3 for cutoffs, CV2 and CV4 for resonance. First calibrate the [[aout_ng|AOUT_NG]] to normal V/Oct like described on the NG page. Then in the EXT menu of the ensemble, turn on F2A (Filter cutoff/ | For MBSID, the standard channel assignment is CV1 and CV3 for cutoffs, CV2 and CV4 for resonance. First calibrate the [[aout_ng|AOUT_NG]] to normal V/Oct like described on the NG page. Then in the EXT menu of the ensemble, turn on F2A (Filter cutoff/ |
ssm2044_pcb.1232204995.txt.gz · Last modified: 2009/01/17 15:09 by nebula