Electro-Labs Logo
Hand Gesture Recognition Using Electrical Impedance Tomography
1 Comment


As anyone who owns a smartwatch can tell you, one-handed operation isn’t exactly their forte. Beyond the flicking gesture found in a number of smartwatches, there’s not much you can do without a second hand and set of fingers.

A group of researchers have come up with a way to use electrical excitation to view internal impedance cross-sections of an arm. While this doesn’t have the resolution of an X-ray or CT, there’s still a large amount of information that can be gathered from using this method. Different structures in the body, like bone, will have different impedance than muscle or other tissues. Gesture recognition at this level would open up a whole world of possibilities without relying on any non-wearable hardware like ultrasound.

The wristband may not be the first capable of recognizing hand and wrist gestures, but it could be the most practical and it’s cheap, small, and has a power draw minimal enough to make integration directly into a smartwatch feasible and we could easily see it being the next thing in smart watch features.

Motorized Solder Paste Dispenser Powered by Arduino
1 Comment


Dispensing solder paste onto one board is easy enough with a syringe or toothpick, but when pasting up even a handful of boards. Solder paste stencils speed up the process when you’re doing dozens or hundreds of boards. The solution for this is to retrofit a 3D printer to dispense solder paste.

This Solder Paste dispenser is an easy project to build and it makes sense especially when you have most of the parts on hand. This project includes hardware and firmware design of a compatible controller board that is Arduino compatible. The printed is a success with the use of both PLA and ABS and standard slicing parameters with 3 layer shells and 20% infill. Its controller board has a micro USB connector and operates from a standard USB charger. The PCB attached to the motor mount using a Scotch Exterior Mounting Tape.

It might not be quite as accurate as a professional one, but as you can see it seems to work great for purposes.

Web Radio Player Based on Arduino


This Arduino based radio player will provide a base station for tunes if you’re the type who enjoys passing idle time by keeping up with podcasts or listening to web stations but don’t always want to occupy your laptop or tablet.

This Web Radio Player provides inexpensive internet radio player with high quality stereo sound. It can be used to listen on internet radio stations without personal computer or tablet or smartphone. The project has two switches to control the next or previous radio station. It has 14 pre-defined radio stations that can be replaced with the radio stations of your choice by re-programming the modified sketch to the Arduino pro mini. The project’s hardware consist of Arduino pro mini as main processor, ENC28J60 Ethernet module to connects the circuit to the internet, VS1053B and Nokia 5110 LCD module to displays the information about the webradio station.

If you’re going to build your own radio, it’s always cool to disguise your high-tech creation as something more rustic as this is a no-sweat project for both the hardware savvy and those more oriented with code writing.

Alarm Clock Based on Back To The Future Time Circuits


Who wouldn’t want a Time Circuit Clock after watching Back To The Future as a child? Now you can time travel by using the “spacebar” either on the keypad, or time circuits, depending what your time circuits’ options is set and translate your own language file for the time circuits.

This projects attempts to recreate a Time Circuit Clock from Back to The Future movie with some additional features such as FM radio, alarm and clock.  This clock has components of 22-23 PCB handmade board, 160 resistors, 396 LED displays with pins to connect and 24 shift registers.  He replaced the main Arduino compatible board with an Olimex iMX233-OLinuXino-MICRO running a plain Linux distro as the new brain of this project. All schematics and PCB designs are made in KiCad which seems quite powerful, however its component library is really poor compared to Eagle.

Now that everything was given out as far as assembling and designing this alarm clock, there’s no more excuse to build one.

Mint Tin Password Keeper Based on Intel Edison


Probably everyone has a long list of passwords to remember. But are they safe from other and from forgetting them? Some people are using same password for all cases…well this is not safe. And of course using popular words as passwords also isn’t safe. It is better to use characters mixed with numbers. But these are hard to remember.

This project was built to fit and placed inside a mint tin, which makes it easy to carry around. Assembling this small project maybe pricey as you will need components such as Intel Edison, base board, OLED block , Battery block, Hardware pack , small LiPo battery, mint tin and micro USB cable. Assembling the project was so simple; the Edison which is already set-up and prepared will be attach to the battery block. Getting the program should be easy for you after completing all the steps before. Simply download the latest release from the PinTinNano repository.

You can now enjoy your very own password keeper after starting the program.

Graphic Creativity Comes Out with DigiPixel


Have you ever wanted to create your own electronic games console? You might be interested in the new DigiPixel Arduino LED game shield which is definitely worth more investigation.

Make programming fun by creating your own games, animations and more with the DigiPixel shield. The DigiPixel Arduino LED game shield has been specifically designed to allow you to make programming fun and enable you to creating your own games, animations and more. It is an open source Arduino and Digispark compatible shield with a 64 pixel RGB LED display and six buttons that is supplied with its own Arduino library, graphic converter and demo sketches to help you get you started.

You can make sort of things with DigiPixel up to your imagination. You could make a game of Space Invaders, Tetris or Snake, could write messages in the air and capture it on your camera with the AirWrite function or you could use it as an electronic dice, a scrolling desk clock or even a digital name badge. It’s amazing what you can do with just 64 pixels!

Alarm Clock Powered by PIC24


How many times do you need to set your alarm clock before you actually climb out of bed in the morning?

We all have a tendency to check an alarm clocks setting at bed time to make sure it is set right. This clock is almost similar to the one the author previously made, instead of using MSP430 but PIC24. RTCC pheripheral was used for timekeeping while LifePO4 battery as the source of power supply that is charged using USB charger. He also used photo transistor to dim the display in the dark.

As always the author is kind enough to include the source code for us to understand how the project runs. You can also watch the video which walks us through the process. For the display, he used a 7 segment display included with MOSFET placed under it.  This bedside alarm clock has what you’d expect from an alarm clock.

Very Simple but Complete FM Radio


FM radio can be complicated to build, but not this one. This FM radio is about the easiest you can possibly make with only a few components.

This is a very interesting and simple project in the series of communication used to transmit noise free FM signal in the wide range using only one transistor. Because this is a super generative design, component layout can be very important. The power source for this radio is from a 9V battery. The assembling turns out well and you can now start to enjoy your very own radio.

Though the science of radio is well understood, there’s a magical, emotional quality about it that we don’t often stop to appreciate. You will not forget the first time you pick up a transmission broadcast from a device you soldered together, yourself, from a few bits of copper, carbon, plastic, and wire.