Sep 3, 2013 - To upload to your Gemma or Trinket: 1) Select the proper board from the Tools->Board Menu; 2) Select USBtinyISP from the Tools->Programmer; 3) Plug in the Gemma/Trinket, make sure you see the green LED lit. SoftwareSerial - the built in SoftSerial library can (at least) transmit data on any digital pin.Missing. Batman Begins Psp Game Download. 2014-11-3 HC-SR04 Ultrasonic Range Finder with Adafruit Trinket. HC-SR04 Ultrasonic Range Finder with Adafruit. Lets you send serial data from a Trinket. Adafruit Pro Trinket - 5V 16MHz. You cannot plug shields directly into the Pro Trinket; There is no Serial-to-USB chip onboard. Ecommerce Software by Shopify. Small But Mighty: Meet Adafruit Trinket. They added the ability to communicate over the USB serial. Via a software switch, 16 MHz. Both Trinket 5V and Trinket.