Constant-Current Power-LED Driver (ESP32)
Drive high-power LEDs the right way.
- Track
- POWER
- Level
- L2
- Prerequisites
- 1
- Status
- Coming soon
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This board is on the bench. Leave your email and you'll be first in when it ships, and your interest helps decide what we build next.
What you'll build
High-power LEDs need current, not voltage — drive them wrong and they cook. You'll design a constant-current power-LED driver and make a deliberate engineering choice between a simple linear driver and a more efficient switching one, weighing heat, efficiency, and cost. All low-voltage DC — no mains.
It sits on the POWER track: power delivery, including batteries, charging, protection, and the clean rails everything else depends on.
Tools for this build
Free calculators that do the math this board needs. Each is worked from a real OTD board, with the formula and a cited source.
- Ohm's law calculator (V, I, R, and power)Solve Ohm's law for voltage, current, or resistance, and get the power. Enter any two of V, I, R. Worked from a real ESP32 board's indicator LED.
- LED series resistor calculator (Ω from supply, Vf, current)Size an LED's current-limiting resistor from supply voltage, forward voltage, and target current. Gives the nearest E24 standard value and the power it burns.
Part of the path from your first board to a brain-computer interface. See the full skill tree →