Rad tolerant megaAVR MCU for space & avionics applications


by Graham Prophet @ edn-europe.com:

Atmel ATmegaS128 AVR microcontrollers are now produced in space-grade quality, including latch-up immunity, ceramic packaging and extended temperature range for next-generation of space applications.

AtmegaS128 – the first µC Rad Tolerant device for Atmel – delivers full wafer lot traceability, 64-lead ceramic package (CQFP), space screening, space qualification according to QML and ESCC flow and total ionising dose up to 30 krad (300 Gy Si) for space applications. The ATMegaS128 is “latch up” immune thanks to a dedicated silicon process: SEL LET > 62.5Mev at 125°C, 8 MHz/3.3V. SEU to heavy ions is estimated to 10-3 error/device/day for Low Earth Orbit applications.

Rad tolerant megaAVR MCU for space & avionics applications – [Link]

SDM3055 FW Upgrade, YZXstudio Black USB Power Monitor

In this video:
* mjlorton tests the latest firmware from Siglent for the SDM3055 bench multimeter.
* A quick overview of the Fluke TiS10 (vs Ti90) thermal camera
* A look at the YZXstudio Black USB Power Monitor (with optional bluetooth module) that Frank Tong sells on his eBay store

SDM3055 FW Upgrade, YZXstudio Black USB Power Monitor – [Link]

App Note: Heat sink mounting guide


Fairchild Semiconductor’s app note on proper heat sink mounting to achieve lower thermal resistance between the package and its heat sink. Link here (PDF)

This document provides guidelines for mounting heat sinks for the proper thermal management of power semiconductor devices in field applications. This document describes heat sink mounting methods, considerations, contact thermal resistance, and mounting torque for various packages

App Note: Heat sink mounting guide – [Link]

Hyper-local Weather Dashboard: Wunderground + Pi Sense HAT


by InitialState @ github.com:

Let’s face it, we humans talk about the weather a lot ⛅. The average person talks about the weather four times a day, for an average of 8 minutes and 21 seconds. Do the math and that totals 10 months of your life that you will spend yapping about the weather. The weather ranks as the #1 go-to topic for conversation starters and uncomfortable silence breakers. If we are going to talk about it that much, we might as well take our weather street cred to a whole new level. This super-fun and easy project will leverage the Internet of Things (IoT) and a Raspberry Pi to do just that.

Hyper-local Weather Dashboard: Wunderground + Pi Sense HAT – [Link]

DIY Capacitance Meter


electro-labs.com published another great project based on Atmega328P:

We are building another opensource SoloPCB project which is very enjoyable to build and use. In our electronics works, we frequently need to know the actual value of a capacitor. As you know, small sized SMD capacitors have no markings showing their values. Or there are lots of fake electrolytic capacitors which are rated much lower than their stated values. Sometimes the capacitors have large tolerances and we want to choose the best fit for our circuit. What we need is an accurate capacitance meter.

This is a capacitance meter which can measure capacitors rated from picofarads to millifarads. The principle of operation is simple. Just apply voltage to the capacitor and measure the elapsed time to charge it. The circuit is based on Atmega328P and it is Arduino IDE compatible. It includes the voltage regulators which output 5V and 3.3V from 9V input. A Nokia 5110 LCD is used to display the measured information. Thanks to the 4mm banana jacks, various kinds of probes can be used such as SMD probe, crocodile probe etc.

DIY Capacitance Meter – [Link]

OpenduinoGSM an open source tool Arduino IDE compatible with Opengate project inside


Emanuele @ dev.emcelettronica.com:

OpenduinoGSM is an open source tool for hobbyists & professional makers. The first project realized is the useful opengate (one ring with your phone and the gate is open). Inspired with OpenduinoGSM!

With OpenduinoGSM you have the option of using the Arduino development environment, so anyone, even those who are unfamiliar electronics and circuits, can try to realize the automation they want by writing simple code in C ++ or by using one of the many open source projects published and modifying it according to their needs. The steps to make a control and/or a wireless automation are few and simple:

OpenduinoGSM an open source tool Arduino IDE compatible with Opengate project inside – [Link]

Arduino Project: Flappy Bird game Clone with a 1.8″ color TFT display (ST7735)

Educ8s.com @ youtube.com:

Playing the Flappy Bird game on Arduino is extremely easy. With a cheap Arduino Uno and a very cheap 1.8″ color TFT display (ST7735) you can enjoy the classic game, the best part? It is going to be a DIY project. Actually you can build your own gaming console using Arduino, like the popular Gamebuino.

The code of the project is by Themistocles Benetatos who shares the code with us. In his blog he describes how he managed to achieve that result. Don’t miss it: http://www.mrt-prodz.com/blog/view/20…

All you have to do is to buy the following parts, if you don’t own them already. The cost is around 10$:

Arduino Project: Flappy Bird game Clone with a 1.8″ color TFT display (ST7735) – [Link]

STM extend Nucleo range


by Martin Cooke @ elektormagazine.com

STMicroelectronics has extended its range of STM32 Nucleo development boards with scalable, small-form-factor variants to support the 32-pin members of its STM32 microcontroller family. The STM32 Nucleo-32 boards come with support from a choice of IDEs and access to mbed online resources. The STM32 Nucleo open platform is said to enable affordable prototyping using STM32 MCUs combined with a range of hardware plug-ins using Arduino Nano connectors.

Developers can also take full advantage of the STM32 software libraries as well as STM32Cube tools to facilitate software development and port designs from one STM32 variant to another. The STM32 Nucleo boards include the ST-LINK debugger/programmer, which enables drag-and-drop flash programming, so there is no need for a separate debug probe. Since the STM32 Nucleo boards are mbed-enabled, developers can make use of the mbed online tools and collaboration infrastructure at the mbed website.

STM extend Nucleo range – [Link]

Cranial Electrotherapy Stimulator

This cranial electrotherapy stimulator is a medical treatment that makes use of electrical energy to treat anxiety, depression and insomnia. It is a therapeutic tool to help heal the body, which primarily uses an electrical current to stimulate nerves and muscles through the skin. This device uses a few components such as 555 timer, decade counter and the TE connectivity’s slide switch and trimmer. This TE connectivity components offer high-performance designed to withstand extreme shock, vibration, temperature and altitude.

The circuit generates an adjustable current that flows through the clips that are placed on the earlobes. The waveform of this device is 400 milliseconds positive pulse followed by a negative one of the same duration, then a pause of 1.2 seconds. The main frequency is 0.5 Hz and doubles the pulse every 2 seconds. This specialized electrical impulse achieves a state of relaxation.

Electrotherapy stimulator is a simple device that can be easily constructed by electronics enthusiasts. It only needs a few components that are readily available in the market. This device can be applied to variety of treatments that include chronic pain and other medical conditions such as headaches and gout. See also some designs running on 9V.

Cranial Electrotherapy Stimulator – [Link]