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6 Sep 2012

A microcontroller-based voltage cutoff circuit, currently in use on several motorcycles. It is designed to monitor the voltage level for the battery, and activate an accessory circuit when the level is sufficiently high. If the level drops below a calibrated level, the accessories are cut off.

Low-Voltage Cutoff Switch - [Link]

19 Aug 2012

Irdroid v2.0 is advanced version of the Irdroid remote control hardware. The unit is standalone, powered by 12V DC adapter and it has a bluetooth communication module. The unit features a infra-red remote control for android and a Bluetooth Music receiver in one. The module can be used simultaneously to control home TV/AV equipment and to turn any speaker into a wireless bluetooth speakers.

Irdroid v2.0 – universal remote for Android - [Link]

22 Jul 2012

www.lucadentella.it writes:

The BTSwitch project was developed to switch electric devices (lamps…) using an Android smartphone.

In the following video, you can watch the device working, while in the next pages you can find some technical details… enjoy your reading!

BTSwitch – Switch electric devices using an Android Smartphone - [Link]

29 May 2012

 

Pjkim assembled his Soldering Iron Driver v1.5 free PCB and enclosed it into some Tupperware. He had some problems with the firmware, but he eventually got it to work as intended. [via]

 

The LCD works, the iron gets hot and I can solder stuff with it! What do you call the first functioning of a soldering iron? First solder? First smoke? First joint?

Will have a more thorough writeup and more pics on my blog soon. And thank you Arhi and Arakis. And Ian too.

Soldering Iron Driver v1.5 assembled and enclosed - [Link]


29 May 2012

scd writes:

I designed this controller for my Crystalite Sparrow 48V electric bicycle hub motor. The core function of a DC motor controller is to periodically read the throttle setting and adjust the current being supplied to the motor. It does this with a technique called pulse-width modulation or PWM (more on this later). Other functions of the controller include: 1) low-voltage cutoff .. monitor the battery voltage and shut down the motor if the battery voltage is too low .. this protects the battery from over-discharge. 2) over-temperature cutoff .. monitor the temperature of the FET power transistors and shut down the motor if they become too hot .. this protects the FET power transistors. 3) over-current cutoff .. reduce the current to the motor if too much current is being supplied .. this protects both the motor and the the FET power transistors. 4) brake cutoff .. shut down the motor when the brake is applied .. this is a safety feature .. if the user applies brake and throttle, the brakes win.

DC Motor Controller for Electric Bicycle - [Link]

16 Apr 2012

Mr. Georgi Bakalski writes:

Irdroid is a universal infrared remote control for smartphones, tablets and other devices, working with the Google Android operating system.  To control your favourite TV, STB or DVD, you need to download the Irdroid APP for Android and to purchase a Irdroid module.

The Irdroid application is available for download from the Android Market and from Appslib (for android tablets) The biggest benefit of Irdroid is that it is compatible with the LIRC project in which database, there are a lot of supported equipment vendor’s some of the famous are Samsung, Sony, Motorola, LG, Panasonic, Philips and many, many more (see here – > http://lirc.sourceforge.net/remotes/).

Another benefit for the Public is that the Irdroid application is free, open source and the source code can be downloaded from http://www.github.com/irdroid

Irdroid – universal remote control for Android - [Link]

15 Apr 2012

chris @ pyroelectro.com writes:

Standard DC motor control can be tricky enough if you are new to electronics, but how about wireless dual dc motor control? A while ago I introduced you to a simple dual dc motor control design that used the SN754410NE IC to control some off-the-shelf 3v or 6v motors. Let’s take a look beyond just motor control and see if we can’t make that same system wirelessly controlled.

This article will explain how to build a dual DC motor control system, combined with a wireless receiver and transmitter which will tell the motors at what speed they should move forward, or backward. We will use standard and widely available parts so that anyone can follow along.

Wireless Dual DC Motor Control - [Link]

15 Apr 2012

The Ard-Vark is a basic electronics box that can be remotely controlled by an app on your iPhone, iPad or Android phone. It is Arduino compatible. Have you ever wanted to build a project that needed electronics but you didn’t know how to start? Would you like to add motion to one of your creations, and be able to control it with your phone or tablet and not have to learn electronics, soldering, programming and a few hundred other things? Then the Ard-Vark is for you.

The Ard-Vark – control devices using iPhone or Android - [Link]

5 Apr 2012

Photoduino | The opensource camera controller based on Arduino. [via]

This is the eagerly awaited 3.0 version of Photoduino. Photoduino is an open source camera controller based on the Arduino platform which you can use to automatically take pictures with your DSLR camera.

It serves as technical support for shooting high speed photos but you can also use it as an intervalometer to make Timelapse videos or for animals and insects photography.

Photoduino is an electronic circuit that is placed on an Arduino board as a Shield taking all the inputs, outputs and power pins. It has all the necessary electronic components and connectors for connecting the camera, flashes and sensors. You can control the shutter and camera autofocus, and you can also trigger two flashes. It also has a sound sensor, a shock/impact sensor and a laser or infrared barrier that can be used to take pictures when you register an event on any of the sensors. The configuration is done entirely through a small LCD screen using only two buttons, so it works independently without the need for a computer (except for firmware updates).

This system currently supports a wide range of DSLR cameras with a remote shutter cable connector.

Both hardware and firmware are completely open (like the Arduino platform on which it is based) and it is released under an open license.

Photoduino – The opensource camera controller based on Arduino - [Link]

14 Mar 2012

Derek Wolfe writes:

This circuit allows a simple switch or a low voltage pulse (5V for example) to control a large dc load. There’s a good explanation of MOSFET transistors and how to use them as a switch here. This is great for connecting a large load to a microcontroller or other logic circuit. Power MOSFET transistors are perfect for this application and can handle high voltage and current (100V, 77A for the NTP6411). This design would be able to power almost any load you can think of (probably even your car).

N-Ch Power MOSFET Switch - [Link]



 
 
 

 

 

 

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