555 Astable Project — More than just a timer
This project has been designed to introduce the important concept of astable timers and pulse-width modulation using the 555 timer astable circuit. This circuit is very important as it features heavily in the KS4 curriculum. It has been designed to have more than one possible outcome and therefore more than one application. It allows for good differentiation and includes a transistor drive circuit. A training system is also available for use alongside this project to assist students with making important design decisions.
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Frequency can be varied by the 2 variable resistors
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Battery-powered
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PCB has space for a transistor drive circuit to allow higher powered outputs to be added
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Clear silkscreen text has been used to make construction simpler
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Professional double-sided PCB pre-drilled with silkscreen and solder-resist
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Several kit versions available for maximum flexibility, please contact us if you have a particular requirement
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Blank PCBs are available
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Suitable for Key Stages 2, 3 & 4 (ages 11 to 16)
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10-49 |
50-99 |
100-149 |
150+ |
Order Code
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| Blank PCB |
0.75 |
0.65 |
0.55 |
0.50 |
astable PCB
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| Kit Option 1 |
1.99
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1.79
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1.49 |
1.19
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astable op1
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| Kit Option 2 |
2.69 |
2.49 |
2.09 |
1.79 |
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Kit Option 1 - click here for a picture
PCB
Battery clip
Slide switch
555 timer IC
IC socket
Variable resistors
Resistors
Capacitors
2 LEDs
As option 1 but with transducer drive circuit, round rocker switch and terminal blocks
A comprehensive kit is
available from our online store. It is possible to change kit contents for example LED sizes
and colours and components can be upgraded, for example changing the
DPDT slide switch for a round rocker switch. If you have
particular requirements please contact us
555 Astable Schematic
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555 Astable Project
