Workbench Skills Part 6: Measure current — the meter goes IN the circuit

Measuring current with a multimeter? NEVER do this! ⚠️🔋

💥 In amps mode the meter is almost a plain wire (≈ 0 Ω). Put it across a battery = a short circuit → the fuse inside blows.
🔁 Current flows THROUGH things, so the meter must sit IN the path (in series).
1️⃣ Dial to A (or mA)
2️⃣ Red lead to the A / mA jack (black stays in COM)
3️⃣ Open the circuit and put the probes in the gap
✅ Our LED: (9 V − 2 V) ÷ 470 Ω ≈ 15 mA — the meter shows 14.9 mA.
💡 Done? Move the red lead back to V before your next voltage test!