#ADAFRUIT TRINKET POWER CONSUMPTION HOW TO#
#ADAFRUIT TRINKET POWER CONSUMPTION PRO#

#ADAFRUIT TRINKET POWER CONSUMPTION PRO#

The Pro Trinket PCB measures only 1.5' x 0.7' x 0.2' (without headers) but packs the same capability as an Arduino UNO. We also added Optiboot support, so you can either program your Pro Trinket over USB or with a FTDI cable just like the Pro Mini and friends. 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. This was needed to wake up the MCU on the same state it was before it went to sleep.Adafruit Pro Trinket - 3V 12MHz Trinket's got a big sister in town - the Pro Trinket 3V! Pro Trinket combines everything you love about Trinket with the familiarity of the core Arduino chip, the ATmega328. To enable wake-up from sleep the following configuration was used. Since for this project the journey is as important as the final result, the following is really the key findings from my journey: At this point there was really nothing more I could remove or set which I did not need (or that did not move me away from the Trinket platform and into my own custom build).ДЇor this work I relied heavily on the following three resources to get the correct sleep sequence and the watchdog timer operation.: After disabling the ADC the power consumption during sleep went down to 40uA, right at my goal.

#ADAFRUIT TRINKET POWER CONSUMPTION HOW TO#

So the extra effort is really in how to 'tweak' the Trinket platform as close to 40uA as possible.Дoing some research I found out the disabling the ADC was really key in improving the 'sleep' consumption. For me this meant that the Trinket platform should be able to achieve somewhere around 35-45uA power consumption in sleep mode, which was more than adequate for my needs. The regulator used on the Trinket platform draws about 30-40uA (in sleep/standby).

While this was a worthy reduction in and of itself, the MCU datasheet shows that if I optimize things out I should achieve somewhere below 10uA for the MCU. Putting the device to sleep dropped the power consumption to roughly 270uA. After removing the power LED (R4 and/or PWR LED) the power dropped to around 5mA.

I started with close to 9mA of power consumption initially and after all the reconfigurations ended with about 40uA while the Trinket was in sleep mode.ДЇor my +3.3V Trinkets the initial power draw I found to be around 9mA. My ultimate goal was to re-create a low power remote sensor I had made (using PIC MCU and my own board) which I could run for months on AAA batteries. My goal on this article is to provide some simple guidelines on how to achieve low power with Adafruit's Trinket platform. But at this price point it is hard to justify spending the time to do so unless one is trying to go into a high number of copies of the same design. Of course one can customize your own mini platform with better I/O and just the right functions. For close to $5 you get an MCU in a board with pinouts, USB power, and Arduino support. The Adafruit Trinket platform ( ) is a neat small, Arduino compatible, microcontroller platform.

Adafruit trinket power consumption