2N7000 Logic-Level MOSFET LED Switch

Switch a load from a 3.3 V microcontroller pin with the tiny TO-92 2N7000 N-channel MOSFET — the same gate-controlled switching trick as a big IRLZ44N, scaled for hobby currents and dead simple to wire.

Difficulty: Breadboard. Estimated build time: about 18 minutes. Estimated parts cost: about US$2.40. 5-part bill of materials with live supplier pricing. A high-side or low-side LED switch driven by an MCU GPIO using the 2N7000 — a tiny TO-92 N-channel logic-level MOSFET.