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Thanks Paul

I did a search on the adafruit forum and found the needed info. (I hadn't seen that forum before).

I was mostly afraid about ground loops, but that's no problem with a USB power...

Hi

I'm thinking of using a INA260 Adafruit INA260 for measurement some battery powered devices (teensy, other or even single I²C parts).

I would like to use a teensy connected to a PC and...

Nice, very nice

Didn't gave the thickness of the wood ergonomical (usability) problems? I suppose (see) that the height is rather high compared to the wacom tablet or a normal keyboard or...

Thanks a lot.

It's a windows pc, but I was even considering linux VM for the purpose, but this seemed me a bit overkill.

This is a more easy way.

I suppose it's no problem to host those...

Am I missing something obvious?

Hi

What's the preferred way to setup multiple development setups on 1 PC?

I want to program diffent board, mostly teensy, but also some low power boards. What's the "best" setup?

Same to...

Hi

Thanks

I checked it with two fixed resistors and it works quite well.

3.3V - 1000ohm or a bit more fixed resistor - the analog in - and a PT1000 (a bit above 1000Ohm) to the ground

So about 2000-2300 ohm from 3.3V to ground.

It's indeed to only turn on the current when measuring.

Because I plan it to be battery powered and only need a measurement every few seconds (or even less), I want to conserve unneeded energy.

Hi

Probably a stupid question:

Is it possible to use a digital out to give the +3.3V to a voltage divider which is read bij an analog pin?
(aprox. 1000 Ohm - 1000 Ohm divider).

Is it stable...

thanks for the answer

Hi

Which preamp do you use for the headphone?


Alain

Is it suffient to solder the used pins?

I should have been clearer.

Is it possible to configure the M8Q via the I2C and is this a rather straight forward proces?

Hi

Has anybody experience with the SparkFun GPS Breakout - Chip Antenna, SAM-M8Q (Qwiic)?

Specialy "programming" the Ublox.

Alain

Edwin

Have you tried to use the tl972 with a higher gain and using the SGTL at a lower gain?


Alain

Hi

Has anybody combined audio processing with lora devices (non audio messages)?

I've seen SPI versions and also a few uart based lora devices.


Alain

Hi

This will take quite some practice ;-( I also rather start first development with a known working audio adaptor board.

I just find it strange that this is not offered. nobody?

Alain

Hi

Is there a place in the EU that sells a Audio Adaptor Board with headers already soldered on?


Alain

Any precautions when using a class D mono amp (1-3watt) to drive 1 side off a headphone?

Alain

Hi

The invensense ICS-40730 has about 9db more SNR than you're PCB mic, but listens from the bottom.

Hi

I did read that there was a PGA (programmable Gain Amplifier) inside the teensy, but it's only in the 3.2.

if I did the calculations right 12 bit divided by 2 (wave form) gives a SNR of ...

Hi

Thanks

I also did read somewhere that there's an amp in differential mode, but I'm very unsure and it beyond my knowledge.

Alain

Thanks for the good work.

Could Frank decribe the improvements?

Jean-Do: are you using it in "differential output" mode?


Alain

Hi

I found the "FabMicroMEMS-PCB.odt " very instructive as you're other documents.

Hi

I've read the ICS40730 mems mic properties and to me it seems a very nice device, but I'm not looking at ultrasound ;-)
Am I reading the specs correctly that it even can be used without an...

Except for the speed problem, why not using 1 T3.6 and doing the delay line in the Teensy's RAM. That seems a lot easier to me and probably just as fast.

I want to drive a 3W LED. I can use a TIP120 or MOSFET to switch it from the teensy.

But what's the best practise to drive it, I suppose constant current source?

I did find a LDD-600LW, which...

From what I read a uln2803A seems as easy as it gets?

On the other hand, most modules that I found need 5V.

Hi

I'm thinking to control 4 or more PWM PC Case fans from a teensy LC (or 3.2).

I would do 2 things :

a) use 5V to send a pwm signal to every fan seperate
b) switch 12V on and off (group...

Has nobody some info about this?

BTW. I don't mind the needed c++ changes.

Hi

I found that the SGTL5000 can turn parts off. Is it save to turn the not used parts off while using the audio library?
Any power use nr's if everything is "powered off" ?

See...

Why a switch and not using the snooze library to get low power states?

Has nobody needed/tried this?

I found mA nr's while in use, but I'm interested if it's possible to sleep, hibernate or even turn off the Audio board.
...

Would this amp (or the prop shield) be usable for a headphone?

If yes would it be advisable to add a resistor in parallel to th headphone to get rid of some power?

Hi

I'm considering an audio application powered by 3xAAA. It's used only for a duration of about 10-20 minutes and then back a few days later.

From past experience with similar simple...

Hi

If I look at the soft pod on adafruit (https://www.adafruit.com/product/178) I see that those need a 10K resistor between Vcc and the ribbon and another one between the ribbon and ground.

Hi

I remember that the wires for I²S should be short. Any guidelines for a mic?

Alain

Hi

If I read the data sheet for the MAX9817 correctly, I see Attack/release values for the AGC of 1/4000 ms/ms. Does that mean that a loud sound is compensated within 1ms (lowering of the gain),...

Hi Kurt

Are you still using this setup with the lm386 or did you made some changes afterwards?
Still happy with it?

The LM386 can be powered by 5V. This means that teensy and amplifier can use the same supply and battery 5V solutions are easily available. Those can charged by usb (and testing can be done while...

About the LM386: are there more considerations than written in the last of kurtE's posts Connecting-a-Speaker-to-Teensy-3-1-DAC-A14?

Hi

Have you tested it with the teensy?

I also found the lm4881 based amp, but it needs 12V and the board is rather large.


BTW. I have nothing against the audio shield, but I don't like the...

Hi Paul

Another question:

I read that the audio shield has to have very short connections to the teensy. Are there problems to be expected when the teensy and the audio shield are both...

Hi

Would a headphone amplifier like the hama HA202 or the FiiO A1 solve this also?

yes, thanks

Without a 10uF capacitor in series to avoid the DC through the headphone?

a question

How is you're headphone connected to the teensy? Is there a seperate amp or is it a direct connection and working?

Could be also a nice example for a I/O shield, if it's usable from a teensy LC.

--> no soldering off small cables. and no things on the bottom.
...