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13 Oct 2014

IMG_3472

by petemills.blogspot.com:

Before I began the installation of my Yaesu FT-8800 in my car I knew I wanted automatic power ON / OFF. This is a feature that I have always felt was lacking in my other mobile rigs as I am forever leaving my ham radio on long after I have departed the car.

Let’s start with an action packed video of the finished product, then we can talk about how we got there.

Mobile Radio Power Controller ( MRPC ) - [Link]

13 Oct 2014

A Flexible Oven Controller controlled via touch screen or through USB. Draw and download your own profiles using free Profile Creator.

Zallus Oven Controller - [Link]

6 Oct 2014

IMG_20141002_155652-600x449

The Arduino and Cloud-based homebrewing controller by Martin Kennedy of TheBedroomLaboratory:

It’s just a basic site, based on this Scotch.io tutorial, which is currently plotting the temperature in my sitting room. It’s got a PHP backend (Laravel framework with RESTful API), MySQL database and an AngularJS frontend with (n3-chart/d3 for the graph). In the house, I’ve whacked together a quick breadboard circuit which comprises of an Arduino clone, a DS18B20 Temperature Sensor (with resistor for the i2c connection) and an ESP8266 module. Every minute, this wireless sensor POSTs the temperature to our REST API. This value is saved in the database and will appear in the graph whenever the page is opened. To hook it up to a fermenter, the sensor would just be placed in a thermowell in the fermenter bucket so we can see the beer temperature over time.

[via]

Brewmonitor: The Arduino-powered, cloud-based homebrewing controller - [Link]

18 Sep 2014

network switch small4

by serasidis.gr:

Remote control your electrical devices through your local network or internet. The circuit contains one output (Relay) and one input (isolated input). The whole project was built by using arduino nano platform and an ENC28J60 ethernet module. It can be used the W5100 ethernet module instead of ENC28J60, by replacing the UIPEthernet library to Ethernet library.

Moreover, the control is made from the Android application I wrote and it’s available on Google Play (https://play.google.com/store/apps/details?id=com.serasidis.NetworkRelay).

The schematic diagram, arduino sketch, photos and demonstration video is on my web site:

Arduino Network relay - [Link]


17 Sep 2014

door_lock

by simsalapim @ instructables.com:

Ever been looking for your keys, and wanted to call them, before you realize that they are hideously analog pieces of metal? Or wanted to let someone into your house when you’re not at home, without having to lend them your keys?

Lockitron was the solution that descended from hardware heaven – a device that fits over the lock on your door and that is controlled via an app. It raised $2.2M on Kickstarter but missed its original shipping deadline by 1.5 years, leaving its backers in a deadlock (pun!). Are you one of them? Stop glaring at your empty mailbox and channel all your frustration into making your own awesome smartphone connected lock – The Bean Lock.

Open source BLE door lock - [Link]

6 Sep 2014

FYF3GCGHOHY6T61.MEDIUM

by BrittLiv @ instructables.com:

Heating things up is one of the most performed tasks in a lab. Quite a lot of times it is not enough to simply hold something at a certain temperature, but the rate at which something is heated and for how long is just as important. Especially when you try to develop catalysts for chemical processes, the temperature program and exact temperature control is crucial and you probably do not want to stay in the lab for 16 hours to manually adapt your temperature program. Unfortunately, programmable temperature controllers that can automate processes are really expensive. So I decided to build a highly customizable controller that is able to run temperature ramps and read multiple different temperature programs from a SD card. It also provides a logging function on the SD card that allows you to evaluate the resulting temperature profile after running a program.

Programmable Temperature Controller + Hot Plate - [Link]

24 Aug 2014

rpiremote-600x450

A four-channel remote control built using the EnOcean Pi by Kerry Wong:

In my last couple of blog posts, I did a brief overview of the EnOcean Pi sensor kit from Newark and demonstrated how to compile and run the example code using a Raspberry Pi. In this blog post, I will show a real world example – a four-channel remote control built using the EnOcean Pi in conjunction with the EnOcean pushbutton module.

[via]

A four channel remote control using EnOcean Pi - [Link]

7 Aug 2014

IMG_0587-600x448

A simple temperature control system for 3D print or other constant temperature control purpose by Xiang:

I plan to build a home-made 3D printer controlled by my Raspberry Pi, which, unfortunately, does not have any analog data acquisition pin. Therefore I decide to build a stand-alone temperature control system.
The idea is very simple. I use a power resistor as the heater and a thermistor as the temperature sensor. The system contains an LM324 quad op-amps chip. One op-amp is used as a comparator to compare the thermistor resistance with a nominal resistance and output LOW or HIGH as the comparison result. The other three op-amps inside the LM324 are used to perform some linear transformation and output a voltage that is proportional to the thermistor temperature. This voltage is applied to a 0-30V voltmeter so one can read the temperature. A N-Channel MOSFET transistor is used to control on/off of the heater.

[via]

Simple temperature control system - [Link]

24 Jul 2014

photo

Clap switch/Sound-activated switch designed around op-amp, flip-flop and popular 555 IC. Switch avoids false triggering by using 2-clap sound. Clapping sound is received by a microphone, the microphone changes the sound wave to electrical wave which is further amplified by op-amp.

555 timer IC acts as mono-stable multi-vibrator then flip-flop changes the state of output relay on every two-clap sound. This can be used to turn ON/OFF lights and fans. Circuit activates upon two-clap sound and stays activated until another sound triggers the circuit.

Sound Activated Switch - [Link]

19 Jul 2014

IMG_0358

by theifdark.blogspot.com:

These are the RFID readers I used. http://www.parallax.com/product/32390

Arduino RFID Card Door Lock System - [Link]



 
 
 

 

 

 

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