Circuit lets you test capacitors for leakage
https://www.electronics-lab.com/circuit-lets-you-test-capacitors/
Raju R Baddi @ edn.com has published a circuit that enable you to test electrolytic capacitors and decide if worth using it on a circuit. The values in the figure are typical for general testing of all capacitors, from 1-nF ceramic versions to 1000-μF electrolytic types. The value of CREF in the circuit is near […]
RFM69 to MQTT gateway using ESP8266
https://www.electronics-lab.com/rfm69-to-mqtt-gateway-using-esp8266/
Martin @ harizanov.com has published an article on how to forward traffic from RFM69 to MQTT using ESP8266: I’ve mentioned my plans for this project during the IoT hangout session few months ago, it has finally materialized as working prototype. The blocker so far was the lack of ESP8266 RFM69 driver and free time on my […]
ATTiny25 based tea timer
https://www.electronics-lab.com/the-perfect-tea-timer/
Michael @ acidbourbon.wordpress.com has built the “perfect” tea timer project. He wrote a post on his blog detailing its assembly: Maybe you just drink coffee. Then this article is not particularly interesting for you. But if you like a cup of black or green tea once in a while you might know the problem: You prepare […]
iBlinds – Make Your Existing Blinds Intelligent
https://www.electronics-lab.com/iblinds-make-your-existing-blinds-intelligent/
Z-wave Alliance contest winner and Texas-based HAB Home Intelligence has launched a crowdfunding campaign on Kickstarter.com to bring iBlinds, a DIY home automation kit, to the market. The product will allow customers to make their existing window blinds “smart” and to control multiple devices with a touch of one button on a phone, tablet, PC […]
PULPino – An open-source microcontroller system based on RISC-V
https://www.electronics-lab.com/pulpino-an-open-source-microcontroller-system-based-on-risc-v/
PULPino is an open-source microcontroller system, based on a small 32-bit RISC-V core developed at ETH Zurich. The core has an IPC close to 1, full support for the base integer instruction set (RV32I), compressed instructions (RV32C) and partial support for the multiplication instruction set extension (RV32M). It implements several ISA extensions such as: hardware […]
Time-based One-time Password fob for Google Authenticator
https://www.electronics-lab.com/time-based-one-time-password-fob-for-google-authenticator/
conoroneill.net has coded an Espruino Pico to work like a HID device. Now that the Espruino Pico has (beta) HID support, it can pretend to be a keyboard or mouse (or other HID compatible device). This makes it possible to send characters to the active window on your Windows/Linux/Mac PC. I’ve cobbled together some code which […]
Bubble display shield for Adafruit Trinket
https://www.electronics-lab.com/bubble-display-shield-for-adafruit-trinket/
davedarko created this Adafruit Trinket Pro shield for the HP QDSP-6064 bubble display. The design files and source code are hosted on GitHub. An additional temperature sensor in the form of the LM75 can be added to this bubble display shield. The atmega32p is capable of driving up to 40mA per pin, so with the […]
ESP8266 + DS18B20 to Emoncms
https://www.electronics-lab.com/esp8266-ds18b20-to-emoncms/
Jhon_Control @ instructables.com has written a tutorial on how to monitor temperature using the ESP8266 and DS18B20 and display the data on Emoncms platform. Emoncms is an open source web application that enable you to monitor and visualize different environmental data. ESP8266 + DS18B20 to Emoncms – [Link]
Lasers built on silicon are a step towards fully integrated photonics
https://www.electronics-lab.com/lasers-built-on-silicon-are-a-step-towards-fully-integrated-photonics/
A group of researchers from the Cardiff University has demonstrated the first practical laser that has been grown directly on a silicon substrate. by Graham Prophet: The lasing structure was formed in indium arsenide/gallium arsenide layers grown directly on a silicon substrate; the research group notes that previous work has involved wafer bonding techniques to […]
LSM6DSL – 3D accelerometer and 3D gyroscope
https://www.electronics-lab.com/lsm6dsl-3d-accelerometer-and-3d-gyroscope/
Two low-power 6-axis inertial modules introduced from STMicroelectronics, the LSM6DSL and LSM6DSM. Both they pack a 3-D digital accelerometer and a 3-D digital gyroscope in a miniature package. These modules consume 0.4 mA in combo normal mode and 0.65 mA in combo high-performance mode, cutting power consumption by as much as 50% over their current predecessors. The LSM6DSL […]