Cheers! Still got bugs, but just nice to see it flashing and possibly functioning. I still need to build a teensy4 wav trigger thing n see whats left to fix =)
Super tidy! Nice work!
As promised to @Jos and @THOGRE hereās the code my @HAGIWO inspired LFO/VCO is running. Itās not super clean (Iām not a huge fan of C++ and I just concentrated on making it work) but it should make sense.
Things to note:
- I use PlatformIO instead of the Arduino IDE, so the code itself is in the
/src
directory - I rewrote the code for my own needs, so thereās a few libraries required - theyāre listed in the
platformio.ini
file. U8g2 runs the OLED, SimpleKalmanFilter smooths the pot and Switch makes handling the push buttons a bit simpler. They should all be available in the Arduino IDEās library browser. Thereās also a library in the/lib
directory (itās not available in the PlatformIO library browser), which simplifies talking to the AD9833. - My hardware is a bit different - the CV input is on a separate pin and the summing is done in software, plus thereās the three buttons. (Also, Iām using an LM358 opamp because I have a load knocking around from years ago )
I still need to add some finesse to how the knob is used with the CV input in 1V/Oct mode but thatās only really there for an added bonus, its day-to-day usage is just an LFO. Anyway - there you go, hopefully thereās something in there that can help
Today i put my triple LFO in the case
Itās my implementation of the simple LFO by Niklas Rƶnnberg
My verified stripboard layout here (under the Dialphone )
That is sick !!! LOVE IT !!
Nice LFO there.
Iām interested to know does the frequency change if you change the shape from saw to triangle? It looks like the wipers of the shape/freq pots area tied together - which if it works is a nice trick. I jumped through hoops to get saw/tri shaping while keeping the rate constant on my LFO, and didnāt think to do it this way.
Cheers,
Dud , did you use 50k trim pots on your version of triple lfo , like the schematic ?
another pcb I had done just needed to make face plate and wire up .
BMC 031 Quad Trapezoidal LFO . kind of a different thing should be interesting .
I recommend LED resistors from 1kohm to 47kohm.
In my case, I used 33kohm because using high brightness LED.
(if I understood your question correctly )
the frequency (or Rate) of the LFO donāt change with shape pot use.
yes (maybe 47k because i donāt have 50K)
thanks Dud , it looks like an interesting project , not like I donāt have a million others to finish .
a pair of Barton Musical Circuits wave shapers , BMC 033
http://www.bartonmusicalcircuits.com/synthstuff.html
Nice, I did one also on stripboard and itās a really interesting module.
Got Duber workin
a dual resonant state variable filter.
Sweep tests
LabRolz Ping test.
ROOLZR click pop ping
Circuit it is based on
^ an old ciat-lonbarde Duber - before he got famous
Today, CV Joystick/Wheel in the case !
A mix with 2 schematics (joystick and wheel)
On one joystick i keep the spring inside to use more like a wheel.
All axes have Offset and Range pot
Wheel have a switch fore 1 oct or 5 oct (positive or negative)
it was long for me to calibrate it, but thatās it, really fun
A video which after having listened to it again with a little atmosphere of K2000
Schematics and my verified stripboard here
Iād be curious to know what your experiences are when applying it on different input wave shapes.