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21 Feb 2011

robots shares his design for a reflow oven controller: [via]

I have bought [an] oven. The main reason for this was to bake some PCBs. As with every reflow oven, this one needs temperature control as well.

I have baked several pcb without problem with unmodified oven. But that might be luck, as the temperature profile is nowhere near perfect.

I have therefore decided to make some simple temp controller to take care of the whole soldering process. As my oven features fan, I will probably want to control it as well. The controller should not to need any special programmer (mega can by programmed with BP) and the board should be etch-able at home.

Reflow oven controller – [Link]

15 Feb 2011

Here’s a project that shows you how to decode a tv remote control’s infrared (IR) signals and make your own IR receiver for it.

The remote control changed the way we watch TV. Some might say that it has made us even lazier. However you see it, it is important to understand how it works and how we can use it in our own projects. Most remote controls, whether for the TV, stereo or cable, operate using infrared light to transmit a command to a receiver, telling it to do something.

Infrared IR Receiver – [Link]

15 Feb 2011

By watching this video, you can understand PID in just 4 minutes. More explanation is given below on this website.

Understanding PID – [Link]

14 Feb 2011

rsdio presents: 1-Wire network via an SPI-compatible display controller.

To produce the 3-wire SPI™ interface required by a MAX7221 display controller (active-low CS, DIN, and CLK), this 1-Wire network serially addresses three 1-Wire switches (DS2413). The first switch creates Chip Select directly (active-low CS), the second creates the serial-data line directly (DIN), and the third switch—with the help of three exclusive-OR gates—creates the serial clock (CLK).

App note: One-wire control of SPI peripherals – [Link]


6 Feb 2011

shams writes:

Hi every one. Today i’ll show you how to make a PWM (pulse width modulation) out of a very famous chip 555 (lm,ne any one will do) with some other parts offcourse. This is really simple and it is very handy if you want to control your leds, light bulb, servo motor or dc motor (brushless also works). My pwm can only change the duty cyle from 10% to 90% it cant do nothing more!

Very simple PWM with 555 - [Link]

31 Jan 2011

The project aims to build an optical access control device known as SecureLED which demonstrated the potential of communicating over cheap commodity LEDs. [via]

Better Access Control Known as SecureLED – [Link]

31 Jan 2011

This project is a 3-dimensional ultrasonic computer mouse known as Magic Mouse which can be worn as a ring on one finger. [via]

Ring-Designed 3D Air-Mouse – [Link]

27 Jan 2011

electronics-diy.com writes:

Solid State Relays are available almost everywhere these days, however they remain very expensive. Therefore, your efforts to build one yourself pays off. Especially since it only needs a handful components and the circuitry is simple and straightforward. A Solid State Relay is actually not a relay at all. There is no ‘relay’ present, just the electronics which does the switching. It works the same way as a relay; you can use a low voltage to switch a higher voltage or better.

Solid State Relay – [Link]

24 Jan 2011

This project is a X-Y plate with a ball on top. The motors control the plate in such a way that the ball always remain on top. This includes controlling of servo motors and visual recognition of the ball using a web camera.

Ball on Plate Control – [Link]

23 Jan 2011

This project by Billy Chasen shows how to make a door able to be opened and closed via a text message. The device uses a Propeller-based Spinneret Web Server and SMS gateway called Twilio. For security, there’s a whitelist of permitted senders.

Opening a door via text message – [Link]



 
 
 

 

 

 

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