Ang MOSFET The MOSFET — the switch your robot runs on

1. Gate, drain, source

Boltahe sa gate (hindi kuryente) ang nagbubukas. Mas matipid kaysa BJT. A voltage on the gate, not a current, opens it. More efficient than a BJT and handles more current.

2. Ang gate ay capacitor The gate is a capacitor

Tanggalin ang gate: nananatiling ON! Kailangan ng pull-down. Gate resistor para hindi masira ang ESP32. Disconnect the gate and it STAYS ON. A pull-down drains it; a gate resistor tames the gulp of current when switching.

3. Threshold at logic-level

Ang karaniwang MOSFET ay kulang sa 3.3 V ng ESP32. Gumamit ng logic-level (hal. IRLZ44N). A standard MOSFET is only half-on at an ESP32's 3.3 V and gets hot. Use a logic-level one.

4. Sa loob Inside

Metal – oxide – semiconductor. Hinihila ng gate ang mga electron at gumagawa ng "channel". The gate's field pulls electrons up into a channel between source and drain.

5. Mga uri Types

Enhancement = karaniwang OFF; depletion = karaniwang ON. N-channel o P-channel. Enhancement is normally off, depletion normally on; each comes in N and P. Our bots use N-channel enhancement, logic-level.