Electricity You Can Measure: Voltage, Current and Resistance

10 Lektionen in dieser Stufe

1. Voltage, Current and Resistance in a Water-Pipe Picture
   Define the three basic quantities, their units and how they relate. · Lab: Sort ten everyday statements into voltage, current or resistance and check the answers.
2. How a Breadboard Is Connected Inside
   Predict which holes are joined and use the power rails correctly. · Lab: Draw the hidden connections of your breadboard, including any split in the rails.
3. Your First External Circuit: LED, Resistor and the 5 V Pin
   Build a closed circuit, identify LED polarity and explain why current needs a return path. · Lab: Light a red LED from 5 V and GND through a 220 ohm resistor, then reverse the LED and observe.
4. Ohm's Law and Choosing an LED Resistor
   Calculate a series resistor from supply voltage, LED forward voltage and target current. · Lab: Compute resistors for red, green and yellow LEDs at 10 mA and pick the nearest standard values.
5. Reading Resistor Colour Bands
   Decode four- and five-band resistors and understand tolerance. · Lab: Sort ten mixed resistors by value using the bands only.
6. Measuring Voltage with a Multimeter
   Set up the meter for DC volts and measure across components without shorting anything. · Lab: Measure the 5 V pin, the 3.3 V pin and the voltage across the LED and its resistor.
7. Measuring Current and Resistance without Blowing the Fuse
   Insert the meter in series for current and measure resistance only on unpowered parts. · Lab: Measure LED current with three different resistors and compare with your calculations.
8. Series and Parallel Circuits on the Breadboard
   Predict how voltage and current divide in series and parallel arrangements. · Lab: Build two LEDs in series and in parallel with separate resistors and measure both.
9. Continuity Testing and Finding a Broken Connection
   Use the continuity beeper to trace wiring and locate open circuits. · Lab: Have a helper introduce a fault in your circuit, then find it with the beeper.
10. Drawing and Reading Simple Schematics
    Translate between a breadboard layout and a schematic using standard symbols. · Lab: Draw the schematic of your three-LED circuit and rebuild it from the drawing alone.

Abschlussprojekt

A three-colour LED indicator panel powered from the 5 V pin, with calculated resistors, a hand-drawn schematic and a table of measured voltages and currents.

Teile für diese Stufe

• 1 × UNO-compatible board
• 1 × USB cable matching the board
• 1 × Solderless breadboard 830 points
• 1 × Jumper wire set male-male
• 1 × Digital multimeter
• 1 × Resistor assortment 1/4 W
• 3 × LED 5 mm red
• 3 × LED 5 mm yellow
• 3 × LED 5 mm green

In jeder Lektion legst du die passenden Teile direkt in den Warenkorb. Arduino-kompatibel →