It’s instant change from 5 to .4hi EZ,
That swing from +5V to 0.4V should easily trigger a 555 timer.
How fast is the change fom 5v to 0.4v.??
E
View attachment 197547
It’s instant change from 5 to .4hi EZ,
That swing from +5V to 0.4V should easily trigger a 555 timer.
How fast is the change fom 5v to 0.4v.??
E
View attachment 197547
Yea I have been searching to find a diagram with no luckhi EZ,
I have not been able to find an actual circuit diagram for that module, from I can see, that 47K could be a problem.
E
Ok if I hook up my output of my optical sensor right to pin 2 on the 555 chip it works when sensor goes lowYea I have been searching to find a diagram with no luck
Yea but as soon as my sensor is closed the motor will run and water level will go back down opening the sensor this putting 5v back on pin 2 and causing timer to time outhi,
Problem is that timer will not tme out while pin2 is low.
E
Will let you know in a couple days when I get homehi EZ,
Look at this LTSpice plot of your circuit.
A 555 timing period starts when Trig #2 is pulled Low.
Where is the L298 drive delay when the Sensor goes High.?
E
I am building a roller filter and the time out period is for the motor to run long enough to roll new filter material outhi EZ,
What is the purpose of the Time out period when the Water sensor Output goes High.????
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What do you mean by “where is the l298 drive delay when sensor goes high?”hi EZ,
Look at this LTSpice plot of your circuit.
A 555 timing period starts when Trig #2 is pulled Low.
Where is the L298 drive delay when the Sensor goes High.?
E
Hi,What do you mean by “where is the l298 drive delay when sensor goes high?”
Delay time will depend on how much of the filter material rolls up when activated, so I can’t really say till I build the unit. But with that jumper I put in from Vi on the DW to pin 2 on the 555 chip it activates and runs the delay even after the sensor goes high, I know it’s not right but it’s one step closer to figuring out what I need to getting it to work with out jumper if it’s possible.Hi,
You said in an earlier post that the output of the 555 was enabling a L298 motor driver module.
As I understand your posts, you want the motor to run when the sensor indicates a LOW level, which triggers a DW44/555 module, set as a Monostable delay.
When the sensor output goes high again, you want the motor to stop, but after a short delay.
But there will be no delayed motor OFF period, as the 555 output will go LOW as soon as the sensor output goes high.
That is what the Quote means.
Please post a sketch of the pulses versus time for the sensor, 555 and the L298 so that we can see exactly the requirement.
E
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Aaron Carman