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In order to use electronics and microcontrollers successfully for projects, we need to understand some electronic terms and theorytheories. These include:
Electronic Circuit: A circuit is a sequence of connected electronic components. The simplest electrical circuit consists of a power source, a load and the connecting lines (conducting wires). Electric current can only flow in a closed circuit. In a closed circuit, the current flows from the negative pole of the power source to the positive pole.
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Resistance (measured in Ohm): Resistance describes the property of materials resist to restrict the flow of electrons to a greater or lesser extent.
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Direct current (DC): Direct current refers to an electronic current which that does not change in direction and strength.
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Alternating current (AC): Alternating current is an electrical current which that changes its direction (polarity) at regular intervals. Alternating current also includes, for example, the current from the socket that oscillates at about 50Hz and at 230 volts.
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- If you are working on a circuit, disconnect the power supply first!
- We only use voltages up to 12V, never above!
- When using soldering irons, special care is required not to burn yourself, or melt a hole in high voltage cablesècables
Further Resources
- Elektronik Grundlagen - Elektronik Kompendium
- Electronic Basics - ITP Physical Computing
- Adventures in Science! - Sparkfun
- Resistor Basics - Sparkfun
- Voltage Divider - Sparkfun
- Ohms Law - Sparkfun
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