Something new I built - fun with decade counters

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

Moderators: lisa, luketeaford, Kent, Joe.

Post Reply
KSS
Super Deluxe Wiggler
Posts: 2519
Joined: Mon Jan 25, 2016 7:28 am

Re: Something new I built - fun with decade counters

Post by KSS » Sun Jun 28, 2020 1:53 am

Sweet looking build! I like the symmetry of the LEDs and their portico 'column; side switches! ;)

Whose stacking connectors are you using?

User avatar
EATyourGUITAR
has no life
Posts: 4892
Joined: Tue Aug 31, 2010 12:24 am
Location: Providence, RI, USA

Re: Something new I built - fun with decade counters

Post by EATyourGUITAR » Sun Jun 28, 2020 8:04 am

I was against SMD for a long time many years ago. now I think a through hole build would benefit from 0402 resistors. I can solder 0402 by hand much quicker than 0603 or 0805 or PTH. like within seconds both pads. that also frees up space running under resistors. don't get me wrong the PCB looks amazing, the whole project is really impressive. but I wonder if it could get any smaller.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF

User avatar
cackland
Super Deluxe Wiggler
Posts: 2074
Joined: Thu Dec 28, 2017 5:42 pm
Location: Los Angeles, California

Re: Something new I built - fun with decade counters

Post by cackland » Sun Jun 28, 2020 11:55 am

EATyourGUITAR wrote:
Sun Jun 28, 2020 8:04 am
I was against SMD for a long time many years ago. now I think a through hole build would benefit from 0402 resistors. I can solder 0402 by hand much quicker than 0603 or 0805 or PTH. like within seconds both pads. that also frees up space running under resistors. don't get me wrong the PCB looks amazing, the whole project is really impressive. but I wonder if it could get any smaller.
I think this project is limited by the width of the linear potentiometers.

But i agree with you and IMO, THT only for specialized components that only exist in THT but other than that, SMD is the way to go.

All of my builds are 0603. Haven't tried 0402. Symmetry and alignment of components are a must.

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Sun Jun 28, 2020 12:00 pm

Yeah the front board is really pretty well packed with sliders and pots. I don't think this could easily be a one board job, but I was definitely thinking I'll lay out a 100% SMT version, which I think would easily by a 2 board stack.

KSS I am just using the regular 3M .1" pin headers and sockets. There are quite a few. One is a 26 pin !

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Sun Jun 28, 2020 12:05 pm

EATyourGUITAR wrote:
Sun Jun 28, 2020 8:04 am
I was against SMD for a long time many years ago. now I think a through hole build would benefit from 0402 resistors. I can solder 0402 by hand much quicker than 0603 or 0805 or PTH. like within seconds both pads. that also frees up space running under resistors. don't get me wrong the PCB looks amazing, the whole project is really impressive. but I wonder if it could get any smaller.
I find with the little tiny smt parts, just handling them and getting them out of the package is more a pain than the actual soldering!

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Sun Jun 28, 2020 7:50 pm

Some sounds samples playing around today with the new build. First part is with the continuous random S&H going and stacking on modulation and then the sub-octave square at the end. 2nd part is messing with the sliders and then adding some modulations.

I also noticed a problem that the unit is initializing ever time I slide the S&H switch to noise mode from A or B. I swear it wasn't doing that on the breadboard. Time to investigate that!

https://soundcloud.com/saywaht/ts0-beta ... -samples-1

User avatar
EATyourGUITAR
has no life
Posts: 4892
Joined: Tue Aug 31, 2010 12:24 am
Location: Providence, RI, USA

Re: Something new I built - fun with decade counters

Post by EATyourGUITAR » Mon Jun 29, 2020 8:53 am

cackland wrote:
Sun Jun 28, 2020 11:55 am
All of my builds are 0603. Haven't tried 0402.
I just checked it was 0603 I was hand soldering actually. :doh: 0402 too small for the iron. I use 0402 when I know the factory pick n place will do it. I don't think the alignment of 0603 matters at all. check it with a meter. if it works then I'm done soldering.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Mon Jun 29, 2020 12:32 pm

Here's a pic of the unit with my panel made on the cheapie CNC (which I got rid of ). The part is like 7% too big so everything doesn't quite line up perfect. Had to enlarge the button holes quote a bit...Lol. anyway, I need to get a good panel with graphics made, but this is the idea.
00100lrPORTRAIT_00100_BURST20200628155957875_COVER.jpg
You do not have the required permissions to view the files attached to this post.

KSS
Super Deluxe Wiggler
Posts: 2519
Joined: Mon Jan 25, 2016 7:28 am

Re: Something new I built - fun with decade counters

Post by KSS » Mon Jun 29, 2020 7:24 pm

The real thing looks more fake than the fake renders did!
Good looking panel and module regardless! Nice work!
Liking the round top slide switches.

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Mon Jun 29, 2020 8:00 pm

LOL!

I think it will look better with a less ill-fitting panel with actual graphics on it too :D.

I also figured out the issue with the Atmega resetting when flipping the S/H switch. That was my screw up. A quick mod and it's fine.

Question, can anyone clarify the proper implementation of the FTDI port on a device like this. I wired it with the best info I could find on the web, but find it strange that it has Vcc on one of the pins. USB from the computer already has USB power, why would I need that on there? It seems to work (I dumped some code from Arduino to it using the Sparkfun FTDI cable, but still it seems weird to me.

User avatar
EATyourGUITAR
has no life
Posts: 4892
Joined: Tue Aug 31, 2010 12:24 am
Location: Providence, RI, USA

Re: Something new I built - fun with decade counters

Post by EATyourGUITAR » Mon Jun 29, 2020 8:50 pm

that sparkfun cable can power an arduino while communicating over UART. some people have bootloaders that allow firmware update over UART after reset. most people use this FTDI232 with 328P but some people actually use it as a general purpose RS232 UART for anything. you can use them with a CNC for example. the rule is that you want power to the target provided by one power supply only. if the target has power, leave usb power disconnected. only connect the ground of USB. if you have an isolated logic analyzer you will connect the isolated ground probe to target ground.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Mon Jun 29, 2020 10:36 pm

OK, thanks EatyourGuitar! That makes sense because I was able to upload code to the new module with it powered off (getting it's little brain powered off my Macbook), but when I accidentally left the module on, the computer got pissed off about USB power usage and disabled the USB ports! Glad I didn't fry my freakin' Macbook :D :D. Also thanks to the computer designiners for thinking of that stuff and not letting me fry my macbook. So I will just remove the Vcc pin connection on the module end then and then it will be safe and programmable only when actually turned on.

I also made some more sound samples, this time mostly in continuous S&H mode. I used one of my TZ oscs getting modulated to be the S&H wave form...some really interesting cross modulation and vibrato stuff you can get going. First part is a more droney "bladerunner" context, 2nd is weird techno:

https://soundcloud.com/saywaht/ts0-beta ... -samples-2

User avatar
EATyourGUITAR
has no life
Posts: 4892
Joined: Tue Aug 31, 2010 12:24 am
Location: Providence, RI, USA

Re: Something new I built - fun with decade counters

Post by EATyourGUITAR » Mon Jun 29, 2020 11:12 pm

you got lucky. usually it kills a regulator and a microcontroller. instead you triggered over-current protection on a mac book. if there is a jumper for 3.3v or 5v selection you should check that also. when two 5v voltage regulators engage in this battle to the death, it is predictable. each one has an internal voltage reference. they will never be an exact match. when you connect 5.03v to 5.01v, each one tries to maintain the constant voltage. they will source or sink up to the max current for that part. two 5v regulators from the same batch same part will always go into thermal shutdown when the outputs are connected. the references will never be an exact match. both of them will be loaded to the absolute maximum rating.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF

User avatar
devinw1
Super Deluxe Wiggler
Posts: 1453
Joined: Tue Aug 07, 2018 11:20 am
Location: Portland, OR
Contact:

Re: Something new I built - fun with decade counters

Post by devinw1 » Tue Jun 30, 2020 10:18 am

EATyourGUITAR wrote:
Mon Jun 29, 2020 11:12 pm
you got lucky. usually it kills a regulator and a microcontroller. instead you triggered over-current protection on a mac book. if there is a jumper for 3.3v or 5v selection you should check that also. when two 5v voltage regulators engage in this battle to the death, it is predictable. each one has an internal voltage reference. they will never be an exact match. when you connect 5.03v to 5.01v, each one tries to maintain the constant voltage. they will source or sink up to the max current for that part. two 5v regulators from the same batch same part will always go into thermal shutdown when the outputs are connected. the references will never be an exact match. both of them will be loaded to the absolute maximum rating.
Oof! Thank you Apple engineers for building in the idiot-resistance on that one!!

A veritable cage match of voltage regulators. :foul:

Post Reply

Return to “Music Tech DIY”