Electricity and Digital Circuits

Basics

• voltage, current, power
• Ohm’s law
• voltage divider
• 2 transitor constant current
• source vs. sink (anode, cathode)

Components

• resistor
• LED
• transistor
• capacitor
• shift register
• ICs

Something that might trip up novices is that some components change behavior with current; others with voltage.

About ICs

ICs often come in different package types. You’ll normally want to start with DIP packaging. Pay attention to whether the IC is a source or sink for current.

Don’t work with mains power.

Exercises

alternate flashing lights fader chaser / sequence