Hey
I have built a small circuit with two solenoids and two arduinos. I want to measure the voltage of two tightened solenoids. It works in one direction if I remove one MC34151 on the side where I measure. If i do not remove the MC34151 I measure only 0,7 V.
Where is the Problem? I think in the MC34151 one ground transitor is always switches on.
nikolausi
I am not sure what you are trying to do, the schematic makes little sense to me.
Applying PWM to both sides of a H-bridge is not going to do much for you and what don you thing that analogue inputbis going to do and why are you driving it through a bridge rectifier?
I assumed by tightened you mean when the solenoid is on, this is the wrong word.
I don't apply the PWM at the same time to both sides of the H-bridge.
I try to communicate between two arduinos with two solenoids in one way it works if I remove the MC34151 on the receiver side.
I use the bridge rectifier to get only a positive voltage.
Well what you are seeing is right. What is happening is that the h-bridge is shorting out any received signal. You need to be able to put the solenoid drive on the receive side into a high impedance mode. I am not sure you can do that with this chip, but I haven't studed the data sheet. Look for an enable line.
thank you
no the MC34151 doesnt have an enable line.
do you know an similar chip with an enable line?
Try the L298
