I bought a solar christmas light LED with only 2 wires for the whole string but the controller can control 2 groups of led. So I hooked it up to a scope and saw that it uses PWM to control brightness and it reverses the polarity to control which string should light up. Can anyone point me to the rig…

Christmas light leds

Paul_B November 27, 2021, 10:25am 3

No, an H-bridge controls both polarity and PWM. You do not use an additional FET with it.

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