Search found 1654 matches

by megaohm
Wed Apr 22, 2020 11:38 am
Forum: Music Tech DIY
Topic: Cleaning up PCBs
Replies: 56
Views: 1621

Re: Cleaning up PCBs

GrantB's post says it all. The iso loosens the flux but you still need to get it off of the pcb with a paper towel, etc. Occasionally I do small boards with only 60/40 rosin flux solder. To clean those I: Find a shallow plastic lid (chinese takeout container) Place pcb in the middle and fill with is...
by megaohm
Sat Apr 18, 2020 4:03 am
Forum: 5U Format Modules
Topic: Marienberg VC Envelope Generator B (an ADSR Laboratory)
Replies: 20
Views: 1143

Re: Marienberg VC Envelope Generator B (an ADSR Laboratory)

Great explanations and post!!!
Fascinating variety of functions on that module.
by megaohm
Sun Mar 15, 2020 5:17 pm
Forum: 5U Format Modules
Topic: EDV-Technik-TS MUC-410 MIDI-->CV Converter
Replies: 21
Views: 2654

Re: EDV-Technik-TS MUC-410 MIDI-->CV Converter

I'm ordering pcbs I designed for this MIDI MUC device to build in MU format. Buy a kit from ebay or elsewhere and you can use the pcbs (two of them) to build in MU. Panel pcb so wiring is fairly minimal. Am hoping to sell five or six pcb sets from my small run of ten. This is for a custom order so I...
by megaohm
Tue Mar 03, 2020 10:38 am
Forum: 5U Format Modules
Topic: Best Fixed Filter Bank?
Replies: 44
Views: 4212

Re: Best Fixed Filter Bank?

Yeah, you can tap the output either from the FFB output or from the mixer output. I don't think it matters too much which one you choose. I didn't even use a multiple, just a Y-splitter like this one: I was just wondering if it is possible to modify the dotcom ffb to integrate the feedback path int...
by megaohm
Tue Jan 07, 2020 7:16 pm
Forum: Music Tech DIY
Topic: Source or alternate for LM7810ACT Voltage Regulator?
Replies: 12
Views: 741

Re: Source or alternate for LM7810ACT Voltage Regulator?

For that project (most others, too) you do not need any special part number. Play fast and loose with the letters. It is a 10V regulator. It's footprint is TO-220 (listed as TO-220-3). Just search "7810" and look under semiconductors. Plenty to chose from: https://www.mouser.com/Semiconductors/Power...
by megaohm
Wed Dec 11, 2019 1:47 pm
Forum: Music Tech DIY
Topic: JH Living Vocoder [BUILD THREAD]
Replies: 324
Views: 25857

True beauty!
Very inspiring.
:party:
by megaohm
Fri Nov 29, 2019 4:41 pm
Forum: 5U Format Modules
Topic: Best Fixed Filter Bank?
Replies: 44
Views: 4212

Flareless wrote:
Schlumpfhut wrote:One can always go down on DIY lane to reduce costs
I think this is the #1 misconception about DIY
:yay:
by megaohm
Fri Nov 29, 2019 4:27 pm
Forum: Music Tech DIY
Topic: super expensive DIY voltage refference.
Replies: 8
Views: 758

The BOM for that lists raw parts cost as $300+.
It's a special thing so not terrible.

There is also a low cost, less precise version using two LM339.
They have an OSH Park pcb file to use for that one, too.

Thanks for posting this. Enjoying the read.
by megaohm
Thu Nov 21, 2019 8:01 pm
Forum: Music Tech DIY
Topic: A new thru zero triangle core VCO
Replies: 227
Views: 13930

Thank you for that link!
Only gotten thru the first 30 pages and already there is so much cool stuff and ideas.
Also, a couple things on RTD resistors.
lemberski wrote:Here how Jim Williams used the LM311 (p.10 from this pdf: http://www.introni.it/pdf/Williams%2003 ... %20EDN.pdf):
by megaohm
Sun Nov 10, 2019 2:30 am
Forum: Music Tech DIY
Topic: Tantek modular effects
Replies: 9
Views: 1448

Check out the Modulation source module. Cool LFO and it is different than the typical synth LFOs I have seen.
by megaohm
Wed Nov 06, 2019 5:56 pm
Forum: Music Tech DIY
Topic: Is anyone working towards an EML 100/200 clone?
Replies: 14
Views: 1451

Bourns and BI Tech/TTE currently make center tapped pots. Both are legit companies with good reputations. Contact BI Tech if you need to special order. Their min quantities are usually low (maybe a couple hundred), inexpensive, and better quality than most (conductive plastic, 100,000 rotations rati...
by megaohm
Mon Nov 04, 2019 8:40 pm
Forum: Music Tech DIY
Topic: Joystick Joy
Replies: 7
Views: 831

They are pot based and are great for synth use. I don't recall the connector name they mate with but that should be easy to google. They also have a second push button on the back. As stated already, the stick is spring loaded or free moving selected via bottom switches, one per axis. Good price for...
by megaohm
Sat Oct 26, 2019 1:03 pm
Forum: 5U Format Modules
Topic: JH Trapezoid in a single MU
Replies: 7
Views: 909

elmerfudd wrote:Killer,killer module, great build, sonic bliss. Phill has made a couple of these in Modcan A format for me. Couple of my favorite modules.
Those are my favorite A Series panels.
I started putting together a cab for that format because of it.
:nana:
by megaohm
Sat Oct 26, 2019 12:45 pm
Forum: 5U Format Modules
Topic: JH Trapezoid in a single MU
Replies: 7
Views: 909

Kudos for an outstanding panelling! It must have been a lot of fun to wire. Well done. Thanks! The wiring is time consuming but not bad, really. Everything is connected to the pcb via MTA100 connects so I didn't have to do much soldering in the congestion. Here's another pic of the back. https://ww...
by megaohm
Sat Oct 26, 2019 12:36 pm
Forum: 5U Format Modules
Topic: JH Trapezoid in a single MU
Replies: 7
Views: 909

looks lovely phil.. :) does the VCA add colour..? and how does the bias effect it all..? If I'm reading the panel correctly, the bias knob acts as a crossfader between the envelope signal and a constant (probably +5V) voltage, so that when the knob is fully counterclockwise the VCA is only affected...
by megaohm
Fri Oct 25, 2019 4:58 pm
Forum: 5U Format Modules
Topic: JH Trapezoid in a single MU
Replies: 7
Views: 909

JH Trapezoid in a single MU

Built this recently for a custom job. Wasn't sure how or if it would work in a single MU space. I was apprehensive the controls would be too cramped. It actually worked well and all controls are easy to use. Will be building one for myself now. Was thinking there may be a person or two on MW who wou...
by megaohm
Sat Oct 12, 2019 11:30 am
Forum: 5U Format Modules
Topic: Need your LPG experience in MU world (opinions/audio)
Replies: 22
Views: 1741

Still have the one CdS left.
That is the last pcb and last panel.
Same with the LFO modules.
I do not plan to restock these.
by megaohm
Fri Oct 11, 2019 11:04 am
Forum: 5U Format Modules
Topic: Must Have euro Modules you would like to see in 5u ?
Replies: 69
Views: 5056

tardishead wrote:
modmax69 wrote:Love to see this filter in 5U:

Frequency Central Raging Bull 3.0

Raging Bull 3.0
mmmmmmmmmm
ask Rick at FC. I think you might have a pleasant surprise
Oops!
I sent my message too late.
:lol:
But it looks like at least one person's wish will come to be.
Good work.
:tu:
by megaohm
Fri Oct 11, 2019 11:03 am
Forum: 5U Format Modules
Topic: Must Have euro Modules you would like to see in 5u ?
Replies: 69
Views: 5056

Love to see this filter in 5U: Frequency Central Raging Bull 3.0 Raging Bull 3.0 That is also a DIY pcb kit so you could have that in your system as an MU module now (more like a month or so). I'm estimating it will come to $300-$350. Get in touch if you want this done. PM or email me direct: phil[...
by megaohm
Thu Oct 10, 2019 3:14 pm
Forum: Music Tech DIY
Topic: [PCB] VCA Rider v5 - shipping
Replies: 46
Views: 7157

Quick update that I should have posted long ago.
These are in stock. I have nearly 100 now.
Contact me if interested.
Here or my email
phil[at]megaohmaudio.com
by megaohm
Thu Oct 10, 2019 3:08 pm
Forum: Music Tech DIY
Topic: Yusynth VCA's good enough in a system?
Replies: 9
Views: 844

I have built several Yusynth VCAs for both my 5U and Eurorack modulars. Within the last few years I built a Veils from Mutable and have never looked back. I enjoy the sound quality much more and love that you can adjust the lin/expo response. I miss the second input for the VCAs but you will figure...
by megaohm
Thu Oct 10, 2019 2:59 pm
Forum: Music Tech DIY
Topic: Yusynth VCA's good enough in a system?
Replies: 9
Views: 844

Re: Yusynth VCA's good enough in a system?

I am about to expand my modular system with extra VCA's. Until today I only biult Yusynth AC and DC versions. Are there better sounding ones out there I should considderin my audio chain? Shameless plug but, This one has lower CV feedthrough and is cleaner: https://www.muffwiggler.com/forum/viewtop...
by megaohm
Wed Oct 09, 2019 4:27 pm
Forum: Music Tech DIY
Topic: log/lin with the 2164
Replies: 35
Views: 1706

guest wrote:although that is not log, it implements the function x^n, where n is the blend setting. so if n = 1, you get linear, and for other values you get square, cube, etc.
x^n

What does the symbol between x and n stand for?
Is it power of?
by megaohm
Fri Sep 20, 2019 7:22 pm
Forum: 5U Format Modules
Topic: Adding some West Coast to the MU
Replies: 20
Views: 2194

First thought was this is a great refit job...
but it is not a refit. It's original.
Wow!
Really impressed with all that hardware and software work.

:hail:
by megaohm
Tue Sep 17, 2019 2:58 pm
Forum: Music Tech DIY
Topic: Best practice regarding buffering & impedance, ground?
Replies: 22
Views: 1177

devinw1 wrote:Thanks for sharing that elby document mungo!. :tu:
Is it just me or are most of the diagrams in the pdf blurry and unreadable?

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