Datasheet

FAQ

How come I can't find the Trinket Serial (COM) Port? Why is no Serial port found when the Trinket is plugged in?

Trinket (and Pro Trinket) do not have a USB-serial converter chip on board, this is how we can make them so small!

Instead of a serial console, the Trinket is programmed

directly

over USB. No COM/Serial port is used at all!

I'd like to use Trinket with Linux....

We don't guarantee Linux support since Linux varies from distro to distro, but here's a very nice tutorial about

Trinket with Ubuntu 14)

I can't seem to upload to my Trinket when it's plugged into a USB 3.0 port (newer Macbooks have USB 3 ports)

Trinket's bootloader is finicky about USB 3 ports, and might not work on them. Try connecting to any USB 2 ports

you have or go through a USB 1 or USB 2 hub (nearly all hubs are v2 or v1 instead of v3)

My Trinket 16MHz can't control servos, NeoPixels, but the code is uploading OK?

Sounds like the Trinket thinks its running at 8MHz but the Arduino software thinks it's running at 16MHz, this causes

timing-specific stuff like Servos and NeoPixels to not work. Don't forget you must turn on 16MHz speedup if you are

uploading to "Trinket 16MHz"

Do so by adding

#include <avr/power.h>

At the very top of your sketch, and then

if (F_CPU == 16000000) clock_prescale_set(clock_div_1);

first thing in setup()

See more details here

Hmm I'm still having problems with Avrdude - and I definitely did the required updates

One fix that works for some people is to edit avrdude.conf and set the

chip_erase_delay = 900000;

under the ATtiny85 heading to

chip_erase_delay = 400000;

That is, a shorter delay.

Can Trinket driver Neopixels (strips, squares, etc)? How many?

Yes! Trinket was designed to drive short segments of NeoPixels. There is enough RAM on the attiny85 to drive 100

pixels, but depending on program RAM usage you may have to scale back to 60 or 40.

You can use EITHER the 3V or 5V Trinket, at EITHER 8 or 16MHz!