ATXRaspi is a smart power controller for RaspberryPi or similar embedded systems running form a 5V input. It allows you to have an external shutdown/reboot button to turn on/off and reset your RaspberryPi or similar system without a need to login or to issue manual shutdown/reboot commands. This is especially useful where your Pi is embedded in a product and requires user intervention to control power. Default Shutdown/Reboot behavior (note changes in R3): A short press (250ms+)...

MightyBoost is a 5V/1.5A boost/charger/backup PSU, meant for embedded systems running from a 5V input. It requires a LiPo battery that kicks in if external power is lost (2Ah+ recommended). Paired with Moteino it can accept a PowerButton for no-login shutdowns, much like ATXRaspi. Please see the dedicated MightyBoost page for details, important requirements and source code. Features: 5A-1.5A boost supply LiPoly charger (default 200mA, 500mA via jumper, see explanation...

DIP breakout board for TPL5110 Nano-power system timer and watchdog - TPL5110 Datasheet Uses just 38nA when your load is put to sleep (load is disconnected from power). operates from 1.8V to 5.5V can drive high power loads (several amps) ultra low 1mV voltage drop between VIN and VOUT (load pin) - may increase to a few mV for high loads 0.1" spaced pins for easy breadboard prototyping castellated side holes allow placing this directly on your own PCB...

Highly efficient buck regulator that can easily regulate 5V from typical 12-24VAC sources (rectified through a 1N4007 diode). This was the regulator...

DIP boost regulator that can supply 5V/1A for your project from a LithiumPolymer or equivalent battery. Same size and pinout as the popular 7805...