The Teensy LC has enough pins to look at 2 pots and 13 buttons without any multiplexer unless you want to add other hardware.
The example Many_Button_Knobs can easily be tweaked to suit. Are you planning to use...
In a word, no to Serial.
Updating the firmware of the MIO-10 enabled it's host to see a multi-cable usbMIDI Teensy, a Beatstep pro or a BCR-2000 although I don't ordinarily use the last two via usb. Currently...
@oddson, that performance issue relates to usbHOST. I think that the issue here is the I2c is blocking so speeding up I2c has it spending less time blocking (midi).
AIR, somewhere in this lengthy thread:-...
@eddevane, how about using a T4.0 with a hub hooked to it's usb host port allowing Windoze to see your individual devices as a single multi-cable device?
No problem. Not mentioned yet the possibility of ground-loop induced noise considering the low level audio being sent to the radio and how the Teensy is powered. An isolated 12-5v reg may be in order and as for the...
Digging into the Teensy Midi library's API put this loopback tester together. Code is based on the example in File>Examples>Teensy>USB_MIDI>TransmitEverything.
Running on a T3.5, USB Type MIDIx4, pressing the button...
Just been exploring the Cobra schematic and the NPN low-side switch will not work for Pin 4 as the PTT switch more or less pulls the bottom end of the radio's speaker to ground for receive so is switching an AC signal....
Another thought on the way back to civilization.
How about an electret handheld mic and read the PTT switch state with a digitalInput pin and use two NPN low-side switches driven by the Teensy to do the PTT stuff for...
Another thought, on the road and staring me in the face is the Mic for a Uniden UH-012 so I took it apart. Has an electret mic and DPDT PTT switch.
Might be a simpler way of providing a mic that the Teensy Audio...
Yeah, CB was a busy marketplace for all kinds of gimmicks although some delay or reverb can greatly assist digging signals out of the noise floor at the receive end especially with SSB.
Still have two of those radios,...
Man, did we have fun with a tape loop and a CB radio - 40 something years ago.
A few questions:-
What kind of CB, AM, SSB, FM whatever.
Do you have it's schematic to explore whats on the inside of the Mic...
Glad you got it working. Played with a Shottky bridge in front of the opto for receive and needed to drop the opto's series R from 220R to 200R to compensate for forward drop.
With the bridge in place, the opto has...
I'm none of those so here goes.
Code reads a (green) Led pin as if an antenna picking up stray garbage looking for a trigger, and if we get one then code does some PinMode shuffling, say pulling one end of the Led low...
Ok, mockup completed. Along the way noted circuit post #12 shows R118 as 10K, should be 110R.
Don't have any BAT54s so D21/22 are 1 Amp Shottky. R204 and Red Led serve as a visible load. With Input HIGH, Led is...
Just adding, in hindsight should have mentioned in my first reply that 1/8" TRS Midi hardware is on the build bench and although I don't have gear with CV or Gate (yet), a colleague does so the protection is an...
MC74HC1GT04DFT2 has HC family input thresholds so probably won't work with +3.3v input signal. You need to look at 74HCTxxx family.
74HCT04 is a hex inverter and its outputs can source or sink 25Ma.
74HCT00 is a...
How about using a 74HCTxxx for U5, U15 and U16 to buffer and level shift to 5v and power protection circuits with +5v?
Having said that, I think the forward drop of two BAT54s needs to be taken into account and feel...
That's a shame, there's nothing else out there that can do what a BCR does, buggy as they are.
I've read that dodgy power supply caps and solder fail on USB connector can cause trouble. Been around long enough for...
Some BCR communication modes can give you Midi feedback depending on how it's mapped by the host so it might pay to double check which mode the BCR is set for and what the host is trying to do with it.
Old codger with advanced soldering iron skills.
Pretty much self-taught Electronics/Automotive/Computer Technician/Hacker/Re-Engineer.
Built an Analog Synth ~1978 pretty much from scratch and life being what it is - what you end up doing whilst being busy with other plans, shelved it.
Forced into isolation by challenging health issues, officially retired and looking for a "mental health" project, dug out the box of remains of the original Synth, caught the bug and currently have a clutch of Roland Synths and other goodies.
To any Hacker worth his salt, off-the-shelf kit don't always give you what you're looking for which is why I'm here...