Like the Trinket, it has onboard USB bootloading support - we opted for a MicroUSB jack this time.

That's why we designed Pro Trinket, with 18 GPIO, 2 extra analog inputs, 28K of flash, and 2K of RAM. Trinket's a year old now, and while its been great to see tons of tiny projects, sometimes you just need more pins, more FLASH, and more RAM. It's like an Arduino Pro Mini with more pins and USB tossed in, so delicious. Trinket's got a big sister in town - the Pro Trinket 5V! Pro Trinket combines everything you love about Trinket with the familiarity of the common core Arduino chip, the ATmega328. All have built-in USB and are comparable in price! The ItsyBitsy's especially are about the same size and have native USB and tons of pins, so they're a very close compatible. So while we still carry the Pro Trinket, we really recommend using the Metro Mini (ATmega328 5V 16 MHz), ItsyBitsy 32u4 5V 16MHz, ItsyBitsy 32u4 3.3V 8MHz or ItsyBitsy M0 3V 48MHz. For example, the construction of a solar food dryer by industrial arts students is described.We still love the Pro Trinket but the bit-bang USB technique it uses doesn't work as well as it did in 2014. General areas addressed include energy sources, alternative energy sources, energy conservation, solar collectors/houses, fuels, utilities, and others addressing the needs of students in or subject matter focus of the areas previously indicated. Presented in the reports are energy-related activities, lessons, units, programs, information, and comments on the impact of the project on students. Reports, related to the project's third objective, are grouped by the following areas: primary intermediate secondary home economics secondary industrial arts secondary mathematics secondary science and secondary social studies. Included in this document are individual reports from teachers who participated in the project. Objectives of the Northern New Mexico Energy Education Project were to: (1) improve teachers' knowledge of energy-related subject matter and energy-related educational materials (2) develop continuing communication and cooperation between elementary and junior high staffs and the university on energy-related matters and (3) provide follow-up technical assistance to classroom teachers to prepare students for roles as citizens and consumers and to provide information on careers in energy-related fields.

Adafruit trinket 5v first project