Dashboard Mode - LED circuit with current-limiting resistor
Goal
Understand how different resistor values affect the current and brightness of an LED in a simple circuit.
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LED circuit with current-limiting resistor in PCB Design - Dashboard Guide
Sample Data
| Resistor (Ohms) | Voltage (V) | Current (mA) | Brightness (Lumens) |
|---|---|---|---|
| 100 | 5 | 20 | 15 |
| 220 | 5 | 9 | 7 |
| 330 | 5 | 6 | 5 |
| 470 | 5 | 4 | 3 |
| 680 | 5 | 3 | 2 |
Dashboard Components
- KPI Card: Average Current (mA) = SUM(Current) / COUNT(Rows) = (20+9+6+4+3)/5 = 8.4 mA
- KPI Card: Average Brightness (Lumens) = SUM(Brightness) / COUNT(Rows) = (15+7+5+3+2)/5 = 6.4 Lumens
- Bar Chart: Resistor Value (Ohms) on X-axis, Current (mA) on Y-axis to show how current decreases as resistance increases.
- Line Chart: Resistor Value (Ohms) on X-axis, Brightness (Lumens) on Y-axis to show brightness trend with resistor changes.
- Data Table: Shows all sample data for detailed view.
Dashboard Layout
+----------------------+----------------------+ | Average Current (mA) | Average Brightness | | 8.4 mA | 6.4 Lumens | +----------------------+----------------------+ | Bar Chart: Current vs Resistor | | (Resistor on X, Current on Y) | +--------------------------------------------------------------+ | Line Chart: Brightness vs Resistor | | (Resistor on X, Brightness on Y) | +--------------------------------------------------------------+ | Data Table | +--------------------------------------------------------------+
Interactivity
User can filter resistor values using a slider or dropdown. When a resistor value is selected or filtered:
- KPI cards update to show average current and brightness for selected resistor(s).
- Bar and line charts update to reflect only the filtered resistor values.
- Data table shows only rows matching the filter.
Self Check
If you add a filter to show only resistor values less than or equal to 220 Ohms, which components update and what changes?
- KPI cards update to average current and brightness for resistor 100 and 220 Ohms only.
- Bar chart shows only bars for 100 and 220 Ohms.
- Line chart shows brightness trend for 100 and 220 Ohms.
- Data table shows only rows with resistor 100 and 220 Ohms.
Key Result
Dashboard shows how resistor values affect LED current and brightness in a simple circuit.