USB power supply active load tester


Sasa Karanovic has designed and built a DIY USB power Supply active load tester, that is available at GitHub:

USB Power supply Active Load Tester or short PAL Tester is unit designed for testing the quality of the power supplies.
Idea was to create low-cost, precise device for simultaneous measurement of Voltage and Current drawn from the device under test.

USB power supply active load tester – [Link]

Basic Automotive Lighting Control with MCU

The electronics trend in automotive is continuously rising due to the demand in the market. The technological developments are now into embedded system in which the manufacturers are developing products that suits to the needs of the people. In this design, it features a automotive lighting control using an MCU with S12 CPU core, 25 MHz bus and up to 240 KB on-chip flash with Error Correction Code (ECC). The timer interface module (TIM) supports up to eight channels that provide a range of 16-bit input capture, output compare, counter and pulse accumulator functions. The on-chip SRAM is up to 12KB while 240KB for flash and 4KB for EEPROM.

The design is comprised of S9S12G240F0CLF 16-bit microcontrollers that serves as the host of the automotive lighting control. It directly communicates with MC10XS6325EK high side driver for the halogen lamps and LEDs that are used in the automotive lighting module. The capacitors connected to VBAT improve emission and immunity performances the same case on VCC while the one connected to CP is charge pump tank capacitor. The capacitor that are connected to OUT1 to OUT5 are for sustaining ESG gun and fast transient pulses that improve emission and immunity performances while the one connected to OUT6 is for sustaining reverse battery voltage. The resistors closed to CSNS pin are for output current sensing and low pass filter removing noise while the ones connected to SYNCB and smart power CSNS are pull-up resistors for the synchronization of A/D conversion. The watchdog timer IN1 to IN4 resistors helps to withstand high voltage. The 20V zener diode and a regular diode are used for the protection of the entire system from possible voltage transients with load or no load while the 5V zener diode is used to ensure 5V supply for the MCU and other components that operates within that range of voltage.

This design is also applicable to space-constrained applications, body controllers, door modules, HVAC, smart actuators, and some related industrial controlling applications with only few external components needed for modifications. It is also a good choice for automotive technological developments and experiments. Since it is targeted generic automotive applications and some intensive applications, therefore it is durable compared to a regular MCUs.

Basic Automotive Lighting Control with MCU – [Link]

Phoenix EH basic is more than just a “basic” enclosure


If you´re searching for an enclosure with a high variability and for a reasonable price, then we can recommend you the EH basic series enclosures.

Searching for a compromise between the quality (materials, design,…) and production costs is a theme at development of every device and naturally – also at development of components. Also from this reason on the market can be found enclosures with a various wall thickness, with various temperature resistance, etc. and so everyone can choose according to requirements of a designed/produced device. EH basic series from company Phoenix Contact addresses everyone who wants a quality enclosure for a reasonable price. We can say, that EH basic series is not designed for absolutely highest rigidity but for a reasonable compromise among strength and the price. However in every way, we don´t deal with a “paper-like” enclosure but with a solid enclosure suitable for a vast majority of applications with modular devices.
EH basic is designed in a way to reach a maximum user comfort and versatility, i.e. to have a possibility to choose optimum size and version.

Versatility is also supported for example by these facts:

  • 2 mounting possibilities – on a DIN rail or on a wall
  • available in 2 various heights (110,5/54mm)
  • available in 7 various widths (22,5-90mm)
  • parts of enclosure mating without use of tools
  • 3 various cover versions (closed, 1-sided connection, 2-sided connection) in two colors
  • integrated (recessed) field for marking (labels) on the side of enclosure
  • over 100 combinations is possible
  • PCB mounting is possible in all 3 ways

EH basic enclosures enable to use various connection technologies, including RJ45 and USB connectors, as illustrated at attached pictures. EH basic enclosures will soon be our standard stock item. Upon order, we´re able to supply you all versions.

Further details can be found in the Phoenix Contact electronic enclosures overview.

Phoenix EH basic is more than just a “basic” enclosure – [Link]

DIY Digital Tape Measure


by electronics for everyone @

Today I hope to teach you all about ultrasonic sensors and hopefully by the end you’ll have a nice little digital tape measure of your own to use as you please. This is my second version of this project so if you can get it as small or just don’t feel like dealing with the Arduino Pro mini feel free to change it in any way you want.

DIY Digital Tape Measure – [Link]

Plug-in touchscreen makes a Raspberry Pi tablet


by Graham Prophet @

Distributor element14 has a 7-in. Touchscreen Display for the Raspberry Pi, expanding the ecosystem of accessories, to enable users to create all-in-one integrated projects such as turning their Pi into a tablet, infotainment system or embedded project.

Compatible with Raspberry Pi 2, and Raspberry Pi 1 models B+ and A+*, the screen can be used to make ‘Internet of Things’ (IoT) devices with a visual display. Connect the Raspberry Pi, develop a Python script, and create home automation devices with touchscreen capability. A range of educational software and programs available on the Raspberry Pi will be touch enabled, making learning and programming easier.

Designed by the Raspberry Pi Foundation, the 800 × 480 display connects to the Raspberry Pi’s DSI display connector via an adapter board that handles power and signal conversion. Touchscreen drivers with support for 10-finger touch and an on-screen keyboard will be integrated into the latest Raspbian OS for full functionality without the need for a physical keyboard or mouse.

Plug-in touchscreen makes a Raspberry Pi tablet – [Link]

WifiPixels – ESP8266 Wifi unit combined with a NeoPixel


WifiPixels are a combination of a ESP8266 Wifi unit combined with a NeoPixel(Addressable RGB) LED ring all in one. Video here.

WifiPixels – ESP8266 Wifi unit combined with a NeoPixel – [Link]

A Indoor Ambient Quality Monitor


Davide Gironi has build an indoor ambient quality monitor based on :

SXAM (Spark to Xively AMbient quality monitor), is an ambient quality monitor that logs 4 environmental parameters to the and display the ambient status by using for RGB leds.

SXAM logs: Humidity, Temperature, Ambient noise, Brightness, Note: is now

A Indoor Ambient Quality Monitor – [Link]

LimiFrog – Ultra-compact prototyping. For IoT and much more.


Program it to invent smart objects. For IoT, robots, wearables, your bright ideas. With sensors, strong MCU, bluetooth, oled & more.

LimiFrog — Ultra-compact prototyping. For IoT and much more. – [Link]

OscilloPhone: Use your Smartphone as an Oscilloscope / Signal Generator


by loboat @

Oscilloscopes and Signal Generators are two essential electronics devices to create and test electronic circuits. Unfortunately, these devices are very expensives for students starting electronics, or makers who want use electronic circuits in their creations just once…

The idea of my project is to rethink your smartphone as a portable, powerful and secured platform, able to simulate an oscilloscope and a signal generator for your electronic circuits.
Here, your phone isn’t just an accessorize or an ordinairy remote control : it becomes the center of the project, and a tool to help you create better things in the future.

OscilloPhone: Use your Smartphone as an Oscilloscope / Signal Generator – [Link]

How to Make Two ESP8266 Talk


Rui Santos shows us how to make two ESP8266 to talk:

In this project you’re going to make two ESP8266 talk with each other.

How it works? You’re going to set one ESP as an Access Point (Server) and another ESP as a Station (Client). Then they’ll establish a wireless communication and the Client sends a message to the Server saying “Hello World!”.

How to Make Two ESP8266 Talk – [Link]