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Update regarding this: Further review of the board showed some left over flux on pins 5 & 6 of the BAS40-05V. (Potentially shorting these pins out) Measuring the button cell battery attached it is dead (<1v but cannot sustain any load). Following the power up sequence, Step 2, it would be...

Hi Paul, Appreciate the response! Apologies for the lack of info, as the board is directly soldered to the top of an audio board probing the components underneath is a touch difficult. I will work towards replicating the issue just to better my knowledge on the circuitry and start-up procedure...

Hi all, Had a weird situation that I am trying to better understand. One of our Teensy 4.0 units was not powering on: 5V input via micro USB 0V on 3V3 rail 0V on Pin 4 (EN) of TLV75733P No Short to GND on the 3V3 rail. Power cycling the 5V input did not change the above results, it seemed...

This thread explains it well with diagrams. https://www.gammon.com.au/forum/?id=14175 You are using INPUT_PULLUP to pull up your Teensy INPUTS up to 3.3v (HIGH). Your COL (Inputs) are set as INPUT_PULLUP. Then we cycle through setting your ROWS as OUTPUT LOW. When cycling through, if a button...

Outdated SD.h library? https://github.com/PaulStoffregen/SD

That is correct, you have only adjusted the first instance in which it is checking the input buttonRecord to see when the handset is lifted. There are many other IF statements used to see when the handset is replaced. You will need to adjust these also.

Apologies, yes that is what I meant. Thank you for the help!

Seems this is only an issue based on the program used to open the files. Using an alternative has solved that problem.. As for transfer speed with a sample 4MB file takes just over 6 seconds. This is with T4.0 and Audio shield mounted SDcard. Is there an updated alternative library using the...

I am also having some difficulties with MTP. Using the MTP_Teensy I have included MTP.send_DeviceResetEvent(); Which has allowed for the Teensy to remain connected to the PC and refreshing the directory in windows now shows newly written files. However transfer speeds to and from the SD card...

Hey all, I have tried to search as much as possible on this issues but have not found a resolution. The snooze library hasn't been updated for some time, I am hoping there may be still some support for it here. Current project using Teensy 4.0, Audio shield and the snooze library works perfect...