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4017 Mini Project


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GCSE

Specification

 

The circuit will ...

Reasons

Testing

1)

Run on 4.5 to 6 Volts

  1. Because four AA rechargeable cells could be used.
  2. The 555 chip can run on 4.5 to 16 Volts

Use a multimeter to test at the lowest, highest and intermediate voltages.

2)

Have a 4 to 5Hz clock.

To flash the LEDs quickly but not so fast that they blur.

Use a Picoscope to measure the clock period. Calculate the frequency.

3)

Consume less than 20 mA.

Using 2500 mAh cells, the battery life will be better than 125 Hours.

Use a multimeter measure the current at the highest voltage setting.

Overview

Here is a System Diagram

4017-Mini-Proj-System-Diagram.gif

The Whole 4017 Layout

4017-Mini-Proj-LYT.gif

The Whole 4017 Circuit

4017-Mini-Proj-ALL.jpg

The Astable Clock Generator

4017-Mini-Proj-Astable.jpg 4017-Mini-Proj-Astable.gif

The 4017 Counter Chip

Note the colour coded wiring!

4017-Mini-Proj-Counter.jpg

The Darlington Driver and LED Bar Display

4017-Mini-Proj-D-Driver-and-LED-Bar.jpg

 

 

 

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