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February 14, 2011
Tutorial - Simultaneous RFID Tag Reader Hookup Guide
about 2 years ago
...or Sparkfun should probably check why the latest version is not showing up on the Library Manager.
The library that gets installed with the Library Manager is not the same as the latest one on Github. tagDataBytes is not defined anywhere where the sketch could access it. So reinstall the library manually.
about 3 years ago
I've had similar issues that are somehow are related to the SD card. I have an installation where the WAV trigger is inside an old radiio. It has 8 audio files playing on a loop and the visitor can change which file plays by selecting a different channel. In the code the WAV trigger just controls the volume of each file, it turns the volume of the active file up and keeps others muted.
The problem is that the WAV trigger eats up SD cards. Every few weeks I need to replace it because two issues that come up. Either the WAV trigger jams and just starts glitching one track (playing a very small part of some file on a loop) or the audio of some of the files starts getting noisy (little glitching or crackling). Both of these issues get fixed by swapping out the SD card with a new one.
These issues usually also go away temporarily after rebooting the whole system, but if the issue has showed up once, it will be repepated after it has been running for a few hours. A longer-term fix is to swap the sd card. I've tried three WAV triggers and all of them start doing this after a while.
Any idea how to fix that?
about 5 years ago
Uploading seems to be impossible with a USB3 port on at least on newer Mac laptops that only have USB3. This seems to be a common problem with USBTinyISP products. Discussion on Adafruit forum about this: https://www.adafruit.com/forums/viewtopic.php?f=20&t=30755 This can be usually fixed with connecting the board through a USB2 hub.
It might be a good idea to add to the tutorial that you can set the fuses of a ATtiny85 to 8 MHz by selecting the "internal 8 MHz clock option" and then using "burn bootloader" from the Arduino IDE.
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