by Mach_5 @ instructables.com:
This tutorial brings you from start to finish in constructing your very own smartphone. You will start by 3D printing a case, then soldering printed circuit boards together, assembly, and finally installing a mobile OS onto your phone and using Python to make it yours. You can learn more about this project at hackaday.io/project/5083
Build Your Own Smartphone using Raspberry Pi – [Link]
PiJuice is the ultimate module for all portable Raspberry Pi projects. Includes many fun maker projects and a solar power version too!
As one of the smallest systems around there’s so many amazing things you could do with the Raspberry Pi if it was self-powered and portable. With PiJuice we want to provide not only the best portable hardware/software solution, but also a set of inspiring and affordable guided projects for fun, learning, and breaking out the Pi into the real world.
For the past year we’ve toiled and sweated over the technical minutiae of PiJuice so you don’t have to.
- Onboard 1400 mAh “off the shelf” Lipo battery (with support for larger Lipo Battery up to 5000 mAH+) to last up to 24 hrs + in constant use!
- Full UPS (Uninterrupted Power Supply) solution.
- Integrated RTC (Real Time Clock)
- On board intelligent on/off switch
- Low power deep-sleep state with wake on interrupt/calendar event
- Programmable multi-colored RGB led
- Full power management API available to Raspberry Pi OS with auto shutdown capability when running low on batteries
- Raspberry Pi HAT compatible layout, with on board EEPROM for easy plug and play operation
- Low profile design, to fit inside lots of existing Raspberry Pi cases!
PiJuice – A Portable Project Platform For Every Raspberry Pi – [Link]
by Liam Kennedy @ kickstarter.com:
Raspberry Pi gadget lights up when International Space Station is nearby with Live HD video from the ISS now with Wearable LEDs
The original version of the ISS-Above was funded through a successful Kickstarter nearly 1 year ago. Since then more than 800 ISS-Above’s have been installed worldwide.
At the heart of the ISS-Above is the lovable and successful single board computer called a Raspberry Pi. Over 5 million of these little computers have been sold worldwide.
The ISS-Above functionality has been drastically improved since the first Kickstarter with some truly remarkable new features – including the display of live HD video views of the earth directly from cameras on the International Space Station.
ISS Above HD+ with Wearable Bluetooth Low Energy LEDs – [Link]
by Francesco Truzzi @ b.truzzi.me:
I needed a small, fast and reliable multi-voltage level translator (mainly for connecting ESP8266 boards to the Arduino, got tired of resistor networks pretty quickly) so I built a breakout board for TI’s LSF0204(D).
Datasheet and info here.
The LSF0204 is a nice little chip. It can translate up to 4 signals to and from the following values:
1.0 V ↔ 1.8/2.5/3.3/5 V.
1.2 V ↔ 1.8/2.5/3.3/5 V.
1.8 V ↔ 2.5/3.3/5 V.
2.5 V ↔ 3.3/5 V.
3.3 V ↔ 5 V.
LSF0204 breakout board: a bidirectional, multi-voltage level converter – [Link]
The Twin-T narrow-band notch filter has an RC network that look like twin T’s. An effective attenuation at a given frequency can be obtained with the Twin-T design. The Q factor for this passive filter design is about .25; to get a larger Q factor, an active design is necessary. The Twin-T design works by phase shifting the input 180 degrees out of phase in the legs of the circuit and adding them again at the output to cancel at the desired frequency.
Twin-T Notch Filter – [Link]
by acidbourbon @ acidbourbon.wordpress.com:
Soon after I played around with some simple sequencers and multiplexers to generate more complex sound patterns. I thought it would be cool to have a device to gate oscillators or switch multiplexers with a random sequence. But the the output should change at a defined rate. Can we build a simple random pattern/number generator that works synchronized with an external clock signal? I believe so.
Clocked 8-bit random pattern generator for CMOS synth – [Link]
Raj over embedded-lab.com has build a prototyping board that facilitates the building of simple circuits. It includes a regulated power supply for both 3.3V and 5V, four output LEDs, four input switches, a buzzer, a potentiometer and an onboard breadboard. Using this board you can fast prototype your next project.
Experimenter Prototyping Board for easy circuit build – [Link]
Double the iPhone, double the teardown! With the iPhone 6 Plus laid out for inspection, we turn our attention to the smaller iPhone 6—though at 4.7″, it’s still a giant among iPhones. What was so big that Apple couldn’t fit it into the familiar form factor? Let’s shake it out onto the teardown table and find out!
iPhone 6 Teardown – [Link]
The MAX5825PMB1 peripheral module provides the necessary hardware to interface the MAX5825 8-channel DAC to any system that utilizes Pmod™-compatible expansion ports configurable for I²C communication. The IC features eight independent 12-bit accurate internally buffered voltage-output DAC channels. The IC also features an internal reference that is selectable between 2.048V, 2.500V, and 4.096V (4.096V reference operation is not supported with a standard 3.3V Pmod-port power supply).
MAX5825PMB1 Peripheral Module Board – [Link]