ITIMER FOR 18 MINS HOW TO
ITIMER FOR 18 MINS CODE

ITIMER FOR 18 MINS HOW TO

you don't need to search a specific relay, but can use other relays as well.Īn example of how to control a relay Arduino Playground - HomePageĬonnecting your pump directly to the arduino won't work. The right transistor will be able to handle the relay and asks very little of the arduino. A relay requiring more may work for a while, but will very likely burn the microcontroller of an Arduino.Ī solution to this problem is using a transistor, it works like a switch and. It's quite important that the relay-coil doesn't use more as those 40 milliAmperes if you connect it directly to one of the pins + GND.Īs a safety margin 20 mA would be best. Since the pump is only 4 watts, 999 out of 1000 relays will be able to handle that amount of power.Īt the arduino side though, pins can't handle more as 40 milliAmperes. that the internal switch is strong enough to handle the power needed by the pump.īoth are electronically seperated circuits, arduino powering the coil on one side and the switch handling the pump on the other side. Important is that the coil won't ask too much of your arduino (or other type of solution) and. In a relay a coil magnetically flips a switch. This should be a simple solution not a complicated one.Which is crazy as the relay would take too long.Ģ.Is this way feasible? I might as well DIY a DC motor that takes 5v to pump the water up. Can my water pump run using the 5v pin or I need to step up the arduino.I dun really understand the relationship. Which means according to Watts = Voltage x Amp. Which is making things more complicated than easier.īut my water pump is damn small it takes only 4watts. If I were to step up the power of the Arduino. I asked some friends with engineering experiences. Anyway, this part of the solution is the same whether you produce your pulse from an Arduino microcontroller or from a 555 timer chip. I guess you would be using a low voltage DC pump as the simplest solution. You need a circuit to connect the output of your 555 timer to the pump motor. But the pump itself would be controlled by the 555. It might power it up for 15 minutes, if that's the resolution of your timer. The domestic timer doesn't need to control how long the pump runs, it only needs to power your controller up once per day. You just solder a resister and capacitor to the right pins as specified in the data sheet and it produces a pulse of the right length each time you power it up. Using a 555 timer?Ī 555 timer is way simpler to use than an Arduino. It might work? Cause the pump is actually a super small pump.

If I dun change the amp but try to use a lower voltage. I need seconds cause if I run the water for more than a 1min per day. Ordinary domestic timer is not good enough cause the interval in mins or 15mins. Arduino can use C programming with is so much easier to control.

The reason I want to use arduino is because I already have a arduino from my school project and I dun need to buy additional stuff.Arduino can do accuracy till millisecond which is what I need cause most of the electrical and analog timer in the market is 15min interval which is too long.ĥ55 timer looks good but it look more complicated and technical than arduino. So I be using a 12v 1.2amp lead acid battery input 4watts.Ģ.How to make arduino output 4watts to power up my water pump.ģ.I understand plugging the arduino to a wall plug would be dangerous. How to know the volt and amps needed by my water pump.There is a link that show voltage Booster.Īrduino Playground - HomePage but I dun know how to use it. To find out whats the exact amps and volt I need. The Water pump did not states it's input amp or volt.

How do I set the arduino to have a output of 4watts. I understand Arduino can take input of 6-20v.

ITIMER FOR 18 MINS CODE

I know there is alot of arduino code tutorial on timer. I want to create a arduino timer to water my plants every single day for 10sec each day.

Itimer for 18 mins