Anyone used 28BYJ28-5v Stepper with ULN2003 Driver ?
salmanfaris last edited by
Hi, Anyone has experience with 28BYJ28-5v with ULN2003 Driver. can't find any documentation.
Geethesh last edited by Geethesh
salmanfaris last edited by
Thanks for the quick replay, the pdf is about 28BYJ-48 model it's comes with 5 pins, but I need 28BYJ-28 it comes with 4 pins.
Geethesh last edited by
kowshik1729 last edited by kowshik1729
@salmanfaris I've not used the same version of the stepper motor that you've mentioned but I've used 12V stepper motor with ULN2003 motor driver. So probably I can help you with the queries.
Firstly all the tutorials on the internet show how to connect your motor's wires to ULN2003. But, in reality when you buy those motors the wires color codes may be changed, so in that case, we need to use a multimeter and check the resistance of the wires. 2 wires will have the same resistance and other 2 wires have the same resistance and the leftover one is a ground wire. This way we can get to know which wire must be connected to which port of ULN2003 driver. This is the common doubt all get while using ULN2003.
@Ggreeshma-stani Nailed the PCB in terms of the schematic. But you got it a little bad on the layout side. There are some thumb rules while designing a layout of PCB.
Always place the oscillator and it's capacitors(C1, C2) near to the IC. If you have a doubt on this try checking the Arduino boards or any other boards. you will find an SMD chip crystal alongside of the Arduino XTAL pins. If you ask the reason for this that's simple, to avoid noise creeping in. Crystals provide the clock to the entire digital logic inside the IC. So, there should not be any noise in it. If noise is there, obviously you'll have timing issues.
The bypass caps on the voltage regulator must be placed close to the regulator's input and output pins. The reason for this is also pretty simple, bypass caps will filter out noise coming from the power supply and few other reasons too. So, try placing these bypass caps as close as possible to IC.
Apart from these points, the PCB looked good. Great work. Remember that this message is not to discourage you but just to give a suggestion so that you'll improve it in the next design.
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@salmanfaris the pressure range that we have to measure is between 5-10 cmH20 (ie almost 0.07 - 0.0.14 psi)
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