Hello all's,
first sorry for the not so good english, this is not my mother langage.
I like to ask you help, i developping a command pump circuitry with microchip pic. This is a pwm command to slow down-up the speed of the pump and also reverse the fill-up and fill-down the fuel.
My problem is that sometime the relay is not activated when i reverse the rotation of the pump. I don't no if the relay is 'glued on' while current is passing, or if this is an effect of the dc-motor. The result is that the pump always run in the same direction. If no motor is attached, the reverse seams to run well !
I attach the part of the schema that are in use. If you have some idea, thanks' for help.
Fabrice
first sorry for the not so good english, this is not my mother langage.
I like to ask you help, i developping a command pump circuitry with microchip pic. This is a pwm command to slow down-up the speed of the pump and also reverse the fill-up and fill-down the fuel.
My problem is that sometime the relay is not activated when i reverse the rotation of the pump. I don't no if the relay is 'glued on' while current is passing, or if this is an effect of the dc-motor. The result is that the pump always run in the same direction. If no motor is attached, the reverse seams to run well !
I attach the part of the schema that are in use. If you have some idea, thanks' for help.
Fabrice
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