There could be other minor parasitic drains in the circuitry but those two should get you to your target (he says confidently without being prepared to try them himself.
#ADAFRUIT TRINKET RECHARGE MOD#
If you want to mod the pro trinket, you'll need to desolder or cut the trace to the power led, power it via the 5v output BUT make sure you tape over the USB and FTDI ports or you will forget when you flash a program and end up applying two power sources. So this is a perspective rather than a solution. Now I expect pwr_down consumption to be less than a micro amp but I don't expect it on a dev board or via the Arduino IDE. That realisation led me to order a USBTiny programmer and learn about programming AVRs without the Arduino IDE. There're lots of threads chasing low power on these boards, but I searched high and low and there really is no "aha" answer. Heck, I can't even force myself to solder them into projects. I couldn't bear to butcher my trinkets or pro trinkets. If you take off all the pieces that increase consumption on dev boards like regulators, leds, boot loaders, protection diodes etc it's really just a breakout board. Seriously though, while a project lasting a week on battery can certainly be adequate, it's never satisfying when you know it could last for months or even years. Then it's micro amps and before you know it, nothing can fill that burning desire but nano amps. Sure, that's how it starts, you're just trying milliamps. I am not looking to save micro-amps but to cut the current to within a few milliamps. I removed the OLED display and other peripherals, but the current is still around the 20mA. I am using the, however, I also tried the but without success. When the Pro Trinket is in sleep mode (SLEEP_MODE_PWR_DOWN) the current draw comes down to around 20mA and I cannot bring it down further. After sleep this is where the code will start executing
#ADAFRUIT TRINKET RECHARGE FULL SIZE#
To do so, I have a "non-use" timer that calls the sleepSetup() function (see code below)Ĭode: Select all | TOGGLE FULL SIZE void ISR_1() I will be using a 500 mAh battery and would like to save on power when the device is not used for a while. I am developing a hand held device using a Pro Trinket 5V with the intention to move to the Pro Trinket 3V when done.
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