Digital BBD concept looking for comments and beta testers

[Cabintech]

Coming soon, a low profile through-hole adapter for fitting in tight spaces (like most every pedal ). This reduces the vertical height requirement to about 17mm (0.7in) including the program pin headers. If you want to cut those off it can save about 5mm in height. This give you about 8mmm under the module as useful space on the motherboard.

 

[Cabintech]

Also, to help with PCB design:

Schematic symbol and PCB footprint (JLCPCB)
3D models of module, connector, and adapters (Sketchup)

 

[CarvinDC125]

Coming soon, a low profile through-hole adapter for fitting in tight spaces (like most every pedal ). This reduces the vertical height requirement to about 17mm (0.7in) including the program pin headers. If you want to cut those off it can save about 5mm in height. This give you about 8mmm under the module as useful space on the motherboard.

View attachment 75313

Are these available now?

 

[Cabintech]

Are these available now?

Just came in a few days ago and we have built up some assembled ones. They are available on the website fully assembled or bare PCB https://cabintechglobal.com/ct3680v1-lp-a

 

[Cabintech]

Rev 2.0 of the hardware is in-house! This format and pinout is what we will be using going forward. Instead of the edge connector (got lots of feedback about that) we now have 48 castellated edge pins on 1.4mm centers. This lowers cost (the connector was not cheap), gives a more reliable connection when vibration and road-ruggedness is a concern, and can be easily soldered by hand. This also gave us a few more I/Os to implement some new features.



Significant changes in 2.0 modules:

• Smaller module size, no edge connector (cheaper, more reliable castellated hole I/O)
• Selectable sampling rates of 48kHz (default), 32kHz, 24kHz, or 12kHz
• Delay times up to 2.7 seconds (!) with lower sampling rates
• BBD emulation program (#6) now supports automatic-mode aliasing as an option
• I/O pinout has changed
• No on-board jumpers, all configuration is via I/O pins
• Updatable firmware for new programs and features
• RESET pin added for changes to primary/secondary mode or sample rate without a power cycle

Here is what the new selectable sampling rate will do:

RATE_1	RATE_0	Sampling Rate	Min Delay	Total Max Delay
0	0	12kHz	1.16ms	2.731s
0	1	24kHz	0.58ms	1.365s
1	0	32kHz	0.44ms	1.024s
1	1	48kHz	0.29ms	0.682s

“Total Max Delay” is the total delay time of all channels combined. How this total delay time is divided among the delay channels is defined by the selected program. So delay channels no longer have one fixed maximum delay time in a given program, they have some percentage of the total (which is determined by the selected sampling rate). For example, program #1 is now configuration:



Updated data sheet will be available soon. Also working on new DIL adapter for breadboarding and through-hole use, and an updated development / breakout board for the new format and features.

 

[Cabintech]

We announced V2 today, modules and dev boards are now available on the website (https://cabintechglobal.com/ct3680).



What we did not announce is that we are making the V1 hardware available at 1/2 price while supplies last (https://cabintechglobal.com/ct3680v1). If you don't need the new V2 features, or you want to build a one-off effect, or maybe just want to experiment with the CT3680 platform, the V1 is a great inexpensive way to get started. (Not recommended for production designs as V1 will be discontinued when stock runs out).

We are continuing to refine and develop new programs (firmware) for this platform, let us know if you have ideas for what would be useful!

 

[Passinwind]

We announced V2 today, modules and dev boards are now available on the website (https://cabintechglobal.com/ct3680).

View attachment 81291 View attachment 81292

What we did not announce is that we are making the V1 hardware available at 1/2 price while supplies last (https://cabintechglobal.com/ct3680v1). If you don't need the new V2 features, or you want to build a one-off effect, or maybe just want to experiment with the CT3680 platform, the V1 is a great inexpensive way to get started. (Not recommended for production designs as V1 will be discontinued when stock runs out).

We are continuing to refine and develop new programs (firmware) for this platform, let us know if you have ideas for what would be useful!

I'll probably be in for a few of the discounted ones, but I still haven't even broken out the one with the edge connector you sent me since I have been plenty busy with the original version. Yet another heat wave may keep me out of my shop for the rest of the week, but getting set up for stereo bowed electric upright bass is next up on my development schedule. That will most likely entail a new onboard preamp build too, which is long overdue anyway. It never ends...

 

[bowanderror]

• Selectable sampling rates of 48kHz (default), 32kHz, 24kHz, or 12kHz
• BBD emulation program (#6) now supports automatic-mode aliasing as an option

Man, this thing keeps getting cooler with every post.

The talk of variable sample rates & aliasing options has me thinking about emulation modes for other digital gear, like the E-mu SP-1200 sampler. If I recall correctly it's 12-bit 26kHz, and the clipping & aliasing from the ADC/DAC is a key part of the sound. Might be an idea for expansion modes in the future!