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MoPi 2: Hot-Swap Mobile Power for the Pi
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MoPi-2 is mobile and 24/7 power for the Pi 2 and Pi 3 boards. On your bike, up a tree, or for your home server: we've got you covered! MoPi-2 features: Two ...
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MoPi-2 is mobile and 24/7 power for the Pi 2 and Pi 3 boards. On your bike, up a tree, or for your home server: we've got you covered!
MoPi-2 features:
- Two power inputs via standard screw terminals — for standard batteries, car power sockets, old laptop, supplies, solar panels, wall adapters and more
- Hot-swap power replacement without stopping work
- Shudown the Pi cleanly when batteries discharge
- Right-angled power switch accessible even another PCB is stacked on top
- Usable as a UPS (uninterruptible power supply) by attaching both batteries and mains
- Wide input voltage range: 6.5V to 24V 1
- Ability to deliver up to 2.5A @ +5V to the Pi and attached additional PCBs or devices
- Low power consumption: 15mA when is working, 0.5mA when is sleeping and only 15 µA when is off ! (more than 10 times less than the average battery self discharge rate)
- Auto-off when input voltage reaches 6.0V, protecting the batteries from over-discharging.
- Additional 2-pin terminal for an external battery charger (this is just a gate, all charging functionality depends on the charger itself)
- On-board LED indicators and on screen Linux system notifications
- Configuration of multiple battery chemistries and number of cells from a UI on the Pi
- Full API in Python, plus a shell-friendly command-line interface
- Very low-profile (3.5 mm), bottom entry, 40-pin GPIO connector allowing stacking of other boards on top of the MoPi-2
- PCB pads for external power switch and +5V
- Control of external 5V relay
- Two-way communication via the I2C bus
- Remote power-off: tell MoPi-2 to power down the Pi when logged-in remotely (after a clean shutdown, of course)
- Timer-based wake-up: tell MoPi-2 what time you want your Pi to wakeup, then power it down and MoPi-2 will boot the Pi as requested
- Supports Raspberry Pi 2, Raspberry Pi 3 and Raspberry Pi 3 B+ models.
Many more details, including a setup guide, can be found here
Warnings!!!
- DO NOT plug MoPi-2 onto your Pi while the Pi is powered up!
- DO NOT touch electronic components when they're powered up — you may damage them, or burn your fingers!
- AVOID handling circuit boards when charged with static!
- ALWAYS read the small print on all components supplied with your MoPi-2
- ALWAYS treat batteries and other power supplies with respect — if abused the energy they contain may surprise you in dangerous ways!
- DO NOT feed MoPi-2 to your dog, eat nuts if you're allergic to them, or lose your sense of humour
Jargon buster
Plain-language definitions for the technical terms used above.
- API
- An API (application programming interface) is a defined set of commands or functions that lets one piece of software interact with another, such as a library, operating system, hardware driver or online service. When something offers API support, it means you can control or query it from your own code rather than only through its built-in menus or buttons.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- Hot-swap
- Hot-swap (or hot-swapping) means connecting, disconnecting or replacing a component such as a power source, battery, drive or module while the rest of the system keeps running. It matters where equipment must stay operational without being powered down, and for power supplies it often needs extra circuitry to manage the inrush current or voltage dips that a swap can cause.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- UPS
- An uninterruptible power supply is a battery-backed power system that keeps a device running when external power is unplugged or fails. For an embedded computer, it helps prevent sudden shutdowns that can corrupt files or interrupt a project.
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