USB seven segment display module

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Dilshan Jayakody published a new build:

This project is about an open source, USB based, 10 digit seven segment display unit. This unit is specifically designed to work with POS systems and banking applications. Initially, this system is developed to work with PC based systems, and later it was modified to work with other platforms and applications.

See the full post on his blog.

Aweigh: the open-source alternative to GPS

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A team of student designers and engineers from the RCA and Imperial College have developed a substitute for GPS that does not rely on satellites, called Aweigh:

Aweigh is an open navigation system that does not rely on satellites: it is inspired by the mapping of celestial bodies and the polarized vision of insects. Ancient seafarers and desert ants alike use universally accessible skylight to organize, orient, and place themselves in the world. Aweigh is a project that learns from the past and from the microscopic to re-position individuals in the contemporary technological landscape.

Via Open Electronics.

Check out the video after the break.

New 2.5D pen/laser ESP32 controller

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Bdring published a new build:

I have done several pen and laser machines lately, so I decided to create a custom PCB for Grbl_ESP32 for these types of machines. This is a small (70mm x 60mm) PCB with all the features a pen plotter or laser cutter/engraver would need.
These typically use stepper motors for the X and Y axes. On pen plotters, the Z axis is controlled by a servo or solenoid. On lasers you need an accurate PWM for laser power control.

Project info at Buildlog.Net blog and the library GitHub repository here. It’s also up on Tindie.

LPCNet – Open Source Neural Net speech synthesis

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Jean-Marc Valin has been working on Neural Network (NN) based speech synthesis in his project called LPCNet:

This new demo presents LPCNet, an architecture that combines signal processing and deep learning to improve the efficiency of neural speech synthesis. Neural speech synthesis models like WaveNet have recently demonstrated impressive speech synthesis quality. Unfortunately, their computational complexity has made them hard to use in real-time, especially on phones. As was the case in the RNNoise project, one solution is to use a combination of deep learning and digital signal processing (DSP) techniques. This demo explains the motivations for LPCNet, shows what it can achieve, and explores its possible applications

Via Rowetel.

An open source VOR receiver for Airspy and RTL-SDR

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A simple VOR receiver for Airspy and RTL-SDR called Vortrack by Thierry Leconte, that is available on GitHub:

In the past we’ve seen several other posts about RTL-SDRs being used to decode VOR signals, but Thierry’s implementation appears to be the easiest way to get a bearing straight away. You’ll get the most use out of the software if you install it on a portable device like a Raspberry Pi and take it out for a drive as you’ll be able to see the VOR angle changing then.

Via RTL-SDR.com.

Grbl_ESP32 development board version 3.1

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A board to control your CNC machine with Grbl_ESP32 designed by Bart Dring, that is available on GitHub:

This is a Grbl_ESP32 CNC Development board. This is a quick and easy way to use and test CNC on the ESP32 controller.
Grbl is a great CNC firmware that has been around for nearly a decade. It was originally designed for the Arduino UNO and basic 3 axis CNC routers, but it has been ported to other CPUs and was the basis for many other CNC and 3D printer firmwares.
The firmware was written using the Arduino IDE to make it as user friendly as possible. If you have experience with Arduinos, this will not be much different.

Project info at Buildlog.Net Blog. It’s also up on Tindie.