Hey all,
I have project that requires me to turn a relay depending on an existing pwm output from my micro controller. I know hooking a relay on my PWM line sucks b/c if the pulse width is slow enough I'm going to have a constantly switching relay, if its faster then I'll have made myself an effective EMI generator.
I can't spare anymore outputs as this is a remote bandaid fix for a specific customer,
I was thinking I would put a decoupling cap on the pwm line after a diode and try and smooth the signal out as much as possible, but I don't really like this idea as that cap will wear out and its just not an easily install or replaceable.
Is there better circuit I'm not thinking of ? Or does anyone make relays designed to be driven like this??? (like a latching relay that won't be powering the coil all the time)
Thanks,
I have project that requires me to turn a relay depending on an existing pwm output from my micro controller. I know hooking a relay on my PWM line sucks b/c if the pulse width is slow enough I'm going to have a constantly switching relay, if its faster then I'll have made myself an effective EMI generator.
I can't spare anymore outputs as this is a remote bandaid fix for a specific customer,
I was thinking I would put a decoupling cap on the pwm line after a diode and try and smooth the signal out as much as possible, but I don't really like this idea as that cap will wear out and its just not an easily install or replaceable.
Is there better circuit I'm not thinking of ? Or does anyone make relays designed to be driven like this??? (like a latching relay that won't be powering the coil all the time)
Thanks,