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Heart
Project
The badge consists of
eight LEDs arranged in the shape of a heart. One LED is
lit at a time and this 'chases' round the shape. It
would be easy to adapt this project to create other
shapes with the eight LEDs. This project uses a
555 astable circuit to provide the clock pulses for
the 4017 counter. |
Parts Required
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resistors: 2.2k, 47k, 270 ×8
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capacitors: 0.1µF, 1µF 16V
radial
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red LEDs ×8
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555 timer IC
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4017 counter IC
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DIL sockets for ICs: 8-pin,
16-pin
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on/off switch
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battery clip for 9V PP3
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safety pin to attach badge
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ribbon cable 9-way about 1
meter (to connect badge to main circuit)
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strip board: 16 rows × 19
holes for circuit, 10 rows × 9 holes for
badge |
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Strip board Layout
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Circuit
diagram
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