Questions about the Driving an LED poster

What’s on the Driving an LED poster?

The rule, 3 worked examples, and the mistake everyone makes. An LED is set by its current, so the series resistor is what actually fixes the brigh…; R = (V_supply − V_f) / I_f; 5 V, red V_f 2.0 V = 150 Ω for 20 mA; 3.3 V, blue V_f 3.0 V = 15 Ω for 20 mA; Resistor dissipation = 60 mW; Common mistake: Parallel LEDs sharing one resistor → One resistor each, or a current…. When the supply barely exceeds V_f the resistor controls almost nothing. Use a constant-current driver instead.

Who is the Driving an LED poster for?

Driving an LED belongs to the Electrical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning electronics can pin it up — a beginner, a student mid-course, or someone revising years later.

When should you use the Driving an LED poster?

Use it every time an indicator goes on a board, before the part list is fixed. A wall chart earns its place by being glanceable from where the work is happening, so Driving an LED belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.

What other posters go with Driving an LED?

BJT Operating Regions, BJT vs MOSFET and Common-Emitter Amp sit alongside Driving an LED in the Electrical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.BJT Operating RegionsBJT vs MOSFETCommon-Emitter Amp

Is the Driving an LED poster free to download and print?

Yes. Driving an LED downloads as a free PDF with no account, no email and no watermark, like everything else in the Electrical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence

What size does the Driving an LED poster print at?

Driving an LED is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Driving an LED loses nothing.Printing guide