Derek demonstrates how to build an H-bridge circuit using optocouplers to isolate an Arduino from motor noise and high voltages.
In this application-based episode on optocouplers, Derek puts together an H-bridge circuit, which will allow us to control the speed and direction of a DC brushed motor. An Arduino will provide the PWM pulses and direction control. He also uses optocouplers as the interface between the H-bridge and Arduino, which will mitigate noise and potentially dangerous voltages from damaging our IO pins.
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# Welcome to DC to Daylight
# Optocoupler and H-bridge
# Schematic
# Breadboard
# Software
# Testing
# Give Your Feedback
#optocoupler #breadboard #optoisolator #arduino #arduinoproject #arduinoprojects #pwm
Why it's here
2 people recommend this
What people say. Recommended as a resource for isolating microcontrollers from motor noise and high voltages using optocouplers.
i
u/ivosaurusin r/embedded • Recommends
On “Most resilient Microcontroller ”
…hing sensitive in that small instant.
So you typically need dedicated circuits to be a bridge between any inductive load and a microcontroller. A H bridge, with resilient MOSFETs, snubber networks to damp the inductive spikes, and proper driver circuitry to ensure clean turn on and off signalling are the most common thing.
Some good resources-
link to this videolink to this videolink to this videolink to this videolink to this video…
Don’t share a power supply between a motor driver and a microprocessor controller.
Don’t even share a ground.
Use optoisolators between the 3.3v esp and the 5/12v lm298 module
link to this video
