Tiny-UPS 3.0 – Worlds tiniest UPS with GPIO indicator

Tiny-UPS 3.0 – New & Improved - A tiny-sized UPS for USB devices Tiny-UPS is a compact uninterruptible power supply for 5V USB devices, powered by external Li-Ion or Li-Polymer batteries (not included). Battery size/capacity is flexible—charge and runtime depend on the battery used. It’s ideal for IoT devices and SBCs like Raspberry Pi, Arduino, ODriod™, and Android boards. Mounting holes fit Raspberry Pi Zero and Adafruit™ ADS1115/1015 boards. Monitoring & Indicators Built-in ADC with I2C for monitoring Vin, Vout, battery voltage, and temperature.  GPIO pin signals power status (high = power on, low = power fail).  Green LED = Power on, Yellow LED = Charging (off when full), Blue LED = UPS active.  Sample Python code available for monitoring and shutdown. Power Operation Input: micro-USB, 5V/3A recommended.  Output: seamless switch to battery at 5V when power fails.  A parallel power path allows simultaneous battery charging and output. Features • Tiny size – 3.5cm x 2.8cm (1.38” x 1.1”) • Use case: IoT devices, Arduino, Beagle, Raspberry Pi, ODroid, others. • Output: Micro-USB or solder, UPS 5V, 3A max via micro-USB. • Input: Micro-USB or solder, 5V, 3A power adapter. • UPS Battery: Li-Ion or Li-Polymer batteries. • Charging: max 2A, CCCV. • Monitoring: GPIO for Power failure. I2C for monitoring Vin, Vout, Battery V, Temp. 3.3V pull up for I2C provided externally. • LED’s: LED indicators for battery charging, UPS, Power. • Safety: All electronics are turned off when battery V drops below 2.6V. Battery charges immediately when power is restored. Temperature-controlled charging. Drained battery trickle charge. Overcurrent protection. • Low Drain: Charged battery remains charged for a long time. • ESD/Surge: Input protected by TI Surge Protection Device. Protection for power surges and ESD. Compatibility Works with Pi Zero and full-size models (A , B , Pi 2, Pi 3, Pi 4, and other 40-pin HAT-compatible boards)  Pi Zero: 40-pin header required for full monitoring & shutdown via Python; micro-USB cable option for UPS only  Mounting holes align with Pi Zero and Pi boards (two standoffs on full-size models)  Not compatible with older 26-pin Raspberry Pi boards Resources DatasheetDownloads