This voltage difference can be measured and calibrated across a scale. What is hall effect? Well hall effect is generation of voltage across a conductor when current is flowing through it and at the same instance it is exposed to a magnetic field. With out accuracy, precision and greater resolution flow meters are of no use.įlow meters works on the principle of hall effect.
Major constraints of flow meters are accuracy, precision and resolution. With gas volume, flow pressure can also estimated. Not only water, flow meters can be used to measure the volume of gas passing through the pipe. If water can be monitored so it can also be controlled hence some flow meters have special circuits with actuators through which we can control the water flow.
Controlair flow arduino manual#
In this tutorial we will work with manual valve which has a digital flow meter in it.įlow meters can be used to measure quantity of water passing through liquid pipes. Digital valves are used in heavy industries like oil and chemicals. Normally manual water valve are common but digital and autonomous are also present in market. One can control the valve manually and digitally in order to limit the flow of water through the pipe.
Controlair flow arduino how to#
Relay5 with a 0 time for the on period can not possibly work correctly.In this tutorial i am going to teach you about how to use arduino flow meter to measure the amount of water passing through the water valve. The times define a period of time when the relay is off, and a period of time when the relay is on.
Controlair flow arduino code#
What is the point of operating the relays in this fashion? The comments do not match what the code actually does. Now that you are looping very fast, how to you detect the very short time period for the state before it changes. How can you tell? All four of the relays which are not working have very short on times compared to the ones which are performing as expected. #define RELAY1_ON_TIME 1 // this define the time in milliseconds when relay 1 turn on If (millis() - lastMillis1 >= ((relay1_state = HIGH) ? RELAY1_OFF_TIME : RELAY1_ON_TIME)) īut 1,5,9,10 are not working. #define RELAY10_OFF_TIME 3000 // this define the time in milliseconds when relay 2 turn off #define RELAY10_ON_TIME 1 // this define the time in milliseconds when relay 10 turn on #define RELAY9_OFF_TIME 3000 // this define the time in milliseconds when relay 9 turn off #define RELAY9_ON_TIME 1 // this define the time in milliseconds when relay 9 turn on #define RELAY8_OFF_TIME 6000 // this define the time in milliseconds when relay 8 turn off
#define RELAY8_ON_TIME 3000 // this define the time in milliseconds when relay 8 turn on #define RELAY7_OFF_TIME 6000 // this define the time in milliseconds when relay 7 turn off #define RELAY7_ON_TIME 3000 // this define the time in milliseconds when relay 7 turn on
#define RELAY6_OFF_TIME 6000 // this define the time in milliseconds when relay 6 turn off #define RELAY6_ON_TIME 3000 // this define the time in milliseconds when relay 6 turn on #define RELAY5_OFF_TIME 3000 // this define the time in milliseconds when relay 5 turn off #define RELAY5_ON_TIME 0 // this define the time in milliseconds when relay 5 turn on #define RELAY4_ON_TIME 0 // relay 4 is always on during the cycle #define RELAY3_ON_TIME 0 // relay 3 is always on during the cycle #define RELAY2_OFF_TIME 6000 // this define the time in milliseconds when relay 2 turn off #define RELAY2_ON_TIME 3000 // this define the time in milliseconds when relay 2 turn on #define RELAY1_OFF_TIME 3000 // this define the time in milliseconds when relay 1 turn off Pin 13 to IN6 - RELAY10(recirculating solenoid chamber 2) Pin 12 to IN5 - RELAY9(recirculating solenoid chamber 2) Pin 11 to IN4 - RELAY8(recirculating solenoid chamber 1) Pin 10 to IN3 - RELAY7(recirculating solenoid chamber 1) Pin 9 to IN2 - RELAY6(flush solenoid chamber 2) Pin 8 to IN1 - RELAY5(flush solenoid chamber 1) Pin 7 to IN4 - RELAY4(recirculated pump chamber 2) Pin 6 to IN3 - RELAY3(recirculating pump chamber 1) Pin 5 to IN2 - RELAY2(flush pump chamber 2) Pin 4 to IN1 - RELAY1(flush pump chamber 1) When relay is turned on a corresponding red light will light up I’m surely doing something wrong but i don’t get what, maybe you can help me. I’m having an infinite loop and this is what i wanted, relay 2-6-7-8 are working, 3-4 are always on wich is what i want, but 1,5,9,10 are not working.īefore using lastMillis1 = millis() in each relay all relay was working but not 1 and i hadn’t an infinite loop. I’m a newbie with arduino coding, i’m working on a scientific project (repirometry chambers) and to make it work i need to control 4 pumps and 6 solenoid valves to obtain an infinite intermittent flow through an arduino mega controller
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