Basic Digital Electronics Tutors

Astable 555 Timer Flasher

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If you are starting with electronics, this is the first step. So do it now ! Do-It-Yourself.

• 555 Timer Tutorials
• 555 Timer/Oscillator Tutorial
• 555 Timer Calculator
• 555 and 556 Timer Circuits
• LM555 Timer Circuits

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LED Running lights CD4017.
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Related Resources -

• LED (Light Emitting Diodes) Circuits
• White LED Drive Circuit
• Back and Forth Flasher
• Sequential 10-LED Flasher
• Fun with LEDs
• Optoelectronic circuits, LED circuits
• FC's Solar Circuits

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Digital up down BCD counter

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Realted Resources

• The 4029 CMOS Counter IC
• hyperphysics - binary counter
• 7 Segment LED Counter
• Frequency Counter: Counter Schematic

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The Source Code - digital-tutors - project page.