# 1. Overview #
TinyUPS is a simple 5V/2.5A uninterruptible power supply with a li-ion battery as a buffer, a load sharing power path management system and an ATtiny13 for monitoring power supply and battery charge level as well as for communication with the connected device.
It contains a USB to TTL chip, connect to the Pi UART, you can easily access the terminal; INA219 can help you monitor battery voltage and charge/discharge current; You can mount the SD card reader on your Pi as a NAS; You show some information on the OLED display, such as battery voltage, IP address.
Adopt SW6106 lithium battery charge/discharge IC, support Type-C and Micro-usb power supply, and support charging and discharging.
R-Pi based intercom
Bi directionnal sound video return
IP or 3/4G based (with 3G or 4G hat)
In this version use an audio hat and external speakers and mic for communication.
Add a PI camera with or without infra-red vision to have a visiophone.
Use Jitsi, Wazo or other services to communicate with you devices (phone app, computer app ...) and a pyton script to adress the corect perso...
# Overview #
The [MuonPi Project](http://muonpi.org) utilizes an inexpensive Raspberry Pi B+ plug-on module for particle and nuclear physics detectors aimed for measuring muons from atmospheric showers triggered by high energetic cosmic particles. The goal is to set up a distributed network of these detector stations in order to determine the energy, timing, and eventually the origin of the primar...
A hat for the Raspberry Pi Zero which has several sensors.
Among them a connection to the SDS011 dust sensor.
*** v1+v2 have problems with the dust sensor power supply ***
*** v3 has a problem with the temperature sensor ***
*** v4 is working fine ***
The second version of the Cross-board for Raspberry Pi B +, 2, 3.
1. 8 digital inputs with opto-coupler;
2. 8 outputs with solid-state relays;
3. Communication interface RS485;
4. Real-time clock;
5. Conclusions of 1-Ware interfaces (with 3.3 volt power supply), I2C (with 3.3 and 5 volt power supply and matched levels);
6. Terminals for connection of temperature and humidity senso...
This is a Raspberry Pi Zero W hat/shield with USB MIDI input, stereo audio output, 3 user-configurable buttons and OLED display.
To use as an audio card, enable PWM audio output by adding `dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4` at the end of *config.txt* file.
Remeber that HDMI audio output is the default; use `raspi-config` to force output to 3.5mm audio jack.
If you can't find 47uF...