Arduino DDS AD9850 Antenna Analyzer

This is a no frills DIY Analyzer intended for frequencies ranging from 1.6 to 30 Mhz. This simple Antenna Analyzer could be a nice project for anyone just getting started in setting up a station on the HF bands.

Arduino DDS AD9850 Antenna Analyzer – [Link]


WiFi smoke detector


by Proto G @

This is a simple WiFI Smoke Detector that texts me when it senses smoke. I made this for my battery storage area in case of a lithium polymer fire. I still have all of my regular smoke detectors installed and I don’t suggest relying only on this, but rather as an extra layer of protection. If I had a house I would install a proper fire alarm system that calls the fire department, but I live in a small apartment so I can’t. I can set this one to email and call the local fire department as well(local laws apply). In my county it is allowed as long as you register it with the fire department. Either way, I would rather call the fire department myself when I receive multiple texts.

WiFi smoke detector – [Link]

Build a Motion Control Rig for Time-Lapse Photography


by Tyler Winegarner and Chris Bordeleau @

If you dig around in your camera’s settings long enough, you’re almost assured to find that it has a mode to create time-lapse videos — those magical, time compressing movies that can turn any hillside or street corner into a lightning-paced dreamscape.

Time-lapse videos by themselves are easy enough to make, but if you do enough of them, you’re likely to get bored with the motionless camera framing. But what can you do here? Having a moving time lapse means moving a camera very predictably, and very, very slowly. You can build a simple panning rig out of a mechanical kitchen timer, but that’s only good if your time lapse is an hour or less, plus, the camera will rotate the full 360 degrees in that hour, further limiting your control.

Build a Motion Control Rig for Time-Lapse Photography – [Link]

WXR3031 rework station will replace you three devices


Soldering, deslodering, hot-air works but also a record of your work in a PC – this is the Weller WXR 3031.

Good soldering station is usually a fundament of a workplace. Desoldering station is usually a necessity if you work in development or service. And a hot-air station? – this one is becoming a must at any development or rework of PCBs with SMT components. If we already know, that it´s ideal to have all these three device on a workbench, couldn´t they be integrated into one device?

The answer can be Weller WXR 3031

Right at the beginning it can be said, that in this case a connection into one station brings real benefits, rather than well-known negatives of various „3in1“, „7in1“ and similar products and agents :-).

Perhaps the biggest benefit is saving of space on a workbench and the same control interface for all tools. If you´re familiar with Weller WX2 stations, which we introduced to you in our articles, then you know, that they belong to a very top segment. If we “add” to them a section for a hot air, as well as other additional features and a possibility to connect a vacuum pickup, we receive a top class device which makes every electrician happy.

  • 3 channels
  • 420 (600W) total power
  • temperature 100-450 (550) °C/ 200-850°C (hot-air part)

Available are 4 soldering tools (from micro up to powerful 200W) and 3 tools for desoldering. Concretely WXR 3031 set contains:

  • WXR3 unit
  • hot-air tool WXHAP
  • desoldering tool WXDP 120
  • soldering tool WXP 120

A big benefit for professional workplaces is also a possibility to record your work (traceability – temperature profile) over the USB port to a PC. USB port also serves for a possible firmware update. WXR3031 features intelligent identification of a connected tool and a parameter memory built-in in a given tool, intelligent power save function and a possibility to control several additional devices via the WX port.

WX series meets all requirements for demanding and precise everyday work. High power, user comfort and a wide range of soldering tools and tips will be probably beneficial even for your workplace.

Possibilities of the WXR3031 are very wide and perhaps best illustrated in the attached video. Detailed information will provide you the WXR3031 datasheet , user manual WXR3031 and the “WXR3 Quick start”.
WXR 3031 station was incorporated into our standard stock offer.

WXR3031 rework station will replace you three devices – [Link]

Terahertz Optical Transistors Beat Silicon


by R. Colin Johnson @

PORTLAND, Ore.–Purdue University researchers have demonstrated a CMOS-compatible all-optical transistor capable of 4THz speeds, potentially over a 1000 times faster than silicon transistors.

Nano-photonic transistors processed at low-temperatures can be fabricated atop complementary metal oxide semiconductors (CMOS) to boost switching time by ~5,000-times less than 300 femtoseconds (fs) or almost 4 terahertz (THz), according to researchers at Purdue University. The aluminum-doped zinc oxide (AZO) material from which these optical transistors are fabricated has a tunable dielectric permittivity compatible with all telecommunications infrared (IR) standards.

Terahertz Optical Transistors Beat Silicon – [Link]

Using Efficient SPI Peripherals for Low-Cost MCU-Based IoT Designs


by Warren Miller @

Efficient Internet of Things (IoT) designs must balance a host of requirements that often work against each other. Low cost is important, but often supporting all the key features required by the application increases MCU pin count and memory size—two things that work against low cost. Low power is also important for IoT applications where battery operation is a must. Adding features and improving performance can up the power requirement, however. Clearly finding the right balance between all these requirements can be a problem, but that’s just the type of challenge engineers expect from cutting-edge designs.

Using Efficient SPI Peripherals for Low-Cost MCU-Based IoT Designs – [Link]

Wireless Transmitter System

This wireless project is a power transmission system, it works on the principle of magnetic induction. This Wireless Charging system works as the digital switched mode power supply with the transformer, which is separated into two parts: The transformer primary coil is on the transmitter, working as the transmitter coil, and the transformer secondary coil is on the receiver side as the receiver coil. This system works based on magnetic induction, the better coupling between the transmitter coil and receiver coil gain, the better system efficiency. So the receiver coil should be closely and center aligned with the transmitter coil as possible. After the receiver coil receives the power from the transmitter coil by magnetic field, it regulates the received voltage to power the load, and send its operational information to transmitter according to specific protocol by the communication link. Then the system can achieve the closed-loop control, and power the load stably and wirelessly. (more…)

Arduino Watch With Altitude, Temperature, Compass And Pedometer


by benhur.goncalves @

Hi folks! Last few days I’ve been obsessed with the idea to make my own watch from arduino parts, but something cool I could use and say I did it myself. So I found out there was a sensor board (commonly named GY-87) which had three sensors on it: HMC5883L (compass), BMP085 (pressure, altitude, temperature) and MPU6050 (accelerometer and gyroscope). With it, via I2C, I could add an Arduino Pro Mini, and an I2C Oled Display and make a watch capable of having all this information, plus a pedometer (by analysing accelerometer data).

Arduino Watch With Altitude, Temperature, Compass And Pedometer – [Link]

Externally clocking (and overclocking) AVR MCUs



People familiar with AVR boards such as Arduinos likely know most AVR MCUs can be clocked from an external crystal connected to 2 of the pins. When the AVR does not need to run at a precise clock frequency, it is also common to clock them from the internal 8Mhz oscillator. Before CPUs were made with internal oscillators or inverting amplifiers for external crystals, they were clocked by an external circuit. Although you won’t see many AVR projects doing this, every AVR I have used supports an external clock option.

Externally clocking (and overclocking) AVR MCUs – [Link]

ESP8266 Weather Station with Arduino


by ohneschuh @

I read about the ESP8266 first in March this year and I didn’t know what to do with. And now I’m really fascinated how easy the connection of an Arduino to the Internet can be. Like others I set up a weather station on a breadboard first and sent data to This ends up in a highly condensed stripboard layout and the needed software package.

What are the functionalities?
measure temperature, humidity, pressure and illuminance (brightness)!
send all data to thingspeak
ESP8266 can be turned on and off by Arduino for energy saving
additional digital IOs
Runs on 5 to 12 V
and a lot more

ESP8266 Weather Station with Arduino – [Link]