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Digital Counter Chip Project


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Foreword 2009-07-15: This information was posted at www.discovery747.com/counter hosted by Yahoo Small Biz. Unfortunately today for the first time in years this site is down. So please email me back (see email on the bottom) so I can send you a zip copy of the website so you can see my pictures /schematics. Thank you very much for your understanding and cooperation.

2009-07-14 Website created

Dear Friend,

I have a school project to design a counter to drive the lights of a toy /game ... My father is a mechanical engineer and does not know to help me with this project ...

1. I can pay 50$ by mail for help with this, hopefully for you, as a specialist, simple project. I need a turn key solution, as I know nothing about electronics.
Let me know by email (see contact at the bottom) that you have the expertise and are willing to help me out with this small project.

2. I made the drawings quick and easy in Windows Paint. To draw some precision parts of the drawing I zoomed 800% (View /Zoom /800%).
I hope you can use Paint as well with good success to let me know the solution.

To download the pictures in Bit Map format just Right-Click the images above and select Save As ...

It is desired that at the push of the spring loaded button the light to flash two, three, four, five etc or a set and desired number of times (probably we need a DIP switch to set this up, a DIP switch as illustrated at http://en.wikipedia.org/wiki/DIP_switch ). As no more then 10 flashes are required, it is also required one single DIP switch and one integrated circuit counter to be used. I hope you can help me design such a circuit ...

Above I reproduce the block diagrams I was thinking about, but I need your help to design the exact integrated circuits to count the number of flashes for the figure at the right ...

The bared rectangle above the light bulb signifies the FLASHER (For simplicity and because in addition it makes clicking sounds I am allowed to use the flasher from a car).

The power supply is 12VDC.


Left Figure (Transistor based)
In the figure at the left I used a transistor ... by pushing the spring loaded button, the capacitor charges and opens the transistor. The light will flash several times, weaker and weaker as the capacitor discharges through the resistor. It would be great if you can come up with exact values for the transistor, resistor and capacitor for say approximate three, four flashes.


Right Figure (Integrated Circuit based - Counter) Solution 01
In the figure at the right, by pushing the spring loaded button (energizing for a brief moment Input 1), the counter should start counting ... it counts the impulses at Input 2 ... when it reaches the preset number of flashes the OUT voltage should drop to zero.


Right Figure (Integrated Circuit based - Timer) Solution 02
Alternatively in stead of a COUNTER, a TIMER can be used ... I hope, unlike the TRANSISTOR, the TIMER can abruptly interrupt the power supply after (selectable by DIP switch?) 2 to 10 seconds ...?


Log of so far received suggestions (but as I said I need turn key solution)
555 timer ... Google will show plenty of tutorials on this topic ... turn key solution not yet offered


If you need more information please let me know at [email protected] Adrian.

Web ID: "Counter Chips Web ID_20090714"



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