Archive for March, 2011

Trackball project put on hold but another tablet idea on the horizon already

Trackball project put on hold but another tablet idea on the horizon already

Meeeehhhh.

I accidentally wrecked the main chip with the camera during my testing it seems. Well, to be precise I am not sure. It could also be a problem related to the solder connections I added to the PCB. Anyway, I currently lack time to find this out in detail and there’s some upcoming tasks at work that are prone to …..

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HackHut 555 contest entries winners announced

HackHut 555 contest entries winners announced

We have chosen our winners for the mini contest. the winners and more info here:

http://hackhut.com/2011/02/07/555-contest/

Broken Tracks

Broken Tracks

Can someone please tell me what has caused this?

Thanks

Arduimometer Update

Arduimometer Update

First of all, let me say good luck to everyone entering their designs into the 555 contest and kudos to Jeri and everyone involved in the creation of the contest. I wanted to enter, but I’ve been busy with work, school, and getting this damned Arduimometer up and running.

For me, this Arduimometer has been and is going to be one …..

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555 Contest Entry

555 Contest Entry

558 Candle
A single 558 timer is used to drive LEDs as an electronic candle. The circuit approximates the brightness, color and flicker of a real pillar candle. A cluster of 10 yellow and 1 white LED are colocated in a hollow plastic diffuser. 4 of the yellow LEDs are driven by the 4 slow independent timer outputs of the 558 …..

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my 555 contest entry MINIMUM WATCH (Claus Smitt)

my 555 contest entry MINIMUM WATCH (Claus Smitt)

HI to all hack comunnity

Here i brought you the MINIMUM WATCH.

The concept of this project was to a clock wirh as few ic as posible with the 555 as the core of it.

The idea is simple, i made an 11 led display and 3 counting stages made of 555′s, the first one counts minutes, the second one 5 min. and …..

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555 Applications: A Current Affair

555 Applications: A Current Affair

There are several tachometer circuits using the 555 available on the internet, for example the project available here: http://fly.srk.fer.hr/~wgottwe/e98a034.pdf.  Why another?  This tachometer project attempts to address a couple shortcomings.  One issue is that a circuit that uses a simple differentiator  to trigger the 555 will not work with a sine wave input to the tachometer, …..

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555 Contest Entry – Brett (FightCube)

555 Contest Entry - Brett (FightCube)

Here’s my 555 Contest Entry!  A Nixie Tube Keychain!

Check out the schematics here:

Check out the video here (QUICK VERSION):

Here’s the super extended video (LONG VERSION):

I originally created the first video to get entered in the contest JUST BEFORE THE DEADLINE.  Had to cut out most of the details to get this cut and uploaded to the 555contest with 6 minutes …..

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555 contest entry: capacitance meter

555 contest entry: capacitance meter

The output frequency of a 555 timer in the astable configuration is dependent on the capacitance, and resistors as well. Knowing the resistances and measuring the output frequency, we can get the capacitance.

In the classical astable configuration shown below:

the frequency is given by:

I preferred instead the configuration with a 50% duty cycle, for a better output measurement:

and the frequency is given …..

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Automatic motor reversal control circuilt using LM555

Automatic motor reversal control circuilt using LM555

This circuit was submitted to the 555 Timer contest.

This circuit, page 1 and page 2 will automatically reverse the direction of the motor.  In applications where a motor might be releasing rope or wire, it may be desired to have the motor reverse the direction for a very short period of time in order to take up some …..

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