Hi everyone, I'm currently a third year student. I'm doing my final year project. I have decided to do my final year project Automatic irrigation system. I have prepared to include the following items for my project. 4 pumps, one 4 channel relay, Arduino mega 2560, ultra sonic sensor, Ldr, dhtt11, rain sensor, 4 leds, and lastly, 4 soil moisture sensor. I have begun to code in arduino ide 2.3.4. I have faced issues. My issue is that i have four pumps. I believe there is not enough power my arduino can give out. I can't seem to be able to run all four pumps at one time. I have tested all four pumps individually, and all seem to be working, but once i have made all four to run, only one pump works. Sometimes, two pumps. So i need some advice on how i can proceed with my project. Thanks.
What are the pump's voltage and current ratings? Arduino boards are not power supplies, cannot run motors.
I can’t see a power supply or batteries in your photos.
Please provide the code, and an annotated schematic of the WHOLE project - then we can offer thoughts.
Thanks for the reply my pumps are 5v and 200 ma
I don't have batteries attached. My power supply is from arduino.
You need a separate 5 volt, 2 Amp supply for the pumps and relays.
I see. So i need batteries for each pump?
BTW: I don't see how the us sensor could work with all that birdnest of tubing in the way.
It's just for temporary i planning to use a bit larger water tank. But thanks for noticing and advice.
You need 1 5 volt power supply, whether batteries or a "wall wart" (AC to DC converter) that can supply at least 800mA for the 4 pumps and 300mA for the 4 relay coils, 1.5 Amps + .5 Amp "safety factor", so 2 Amps.
5V adapter wire adapter
Thanks i will try to get the items u advise and test out.