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I guess that it works like in the schematic below:If so, how much is the voltage that the input pin reads when the sensor switch is closed, 5V ορ 12V? So coming from the Arduino no extra driver circuit is needed. EarthwormJim Most fans have a lower control range at about the 30% duty cycle range where they stop operating. As shown the input signal was designed for a 3.3V swing signal but would also work for 5V swing. Look for your circuit, when the switch is open you will have 0V on input. Retrouvez toutes les promotions et réductions Contrôleur Ventilateur 12v sur Aliexpress France !
Fonction de contrôle automatique de la température ou réglage manuel de la vitesse du ventilateur. I want to read the rpm and control the speed of a 12V - four wire fan through Arduino. Also you need to establish the maximum current you will want at the fan to verify the Try to better explain your project, I really found it very confusing, but tried to answer with what you gave me.Here is the recommended way to connect up a typical four wire fan.
To receive a better answer you should show the schematic of the whole fan circuit or provide a link to the spec sheet.Your schematic is wrong. You have the input pin directly connected to ground: it will always read zero.Apologies for my poor schematic.
(You could add the 5k resistor as shown, or if you know how to enable the internal pull-up on the Arduino port pin use that, in which case you would not need the 5k resistor shown.) ... PWM DC 12 V CPU PC Ventilateur CPU Contrôle de la température Contrôleur de vitesse Module d'alarme. Durée de vie : 50 000 heures Since the switch probably is not an inductive load you will not need the optocoupler.Except you will need also to feed another fan and need to do reversion, I will not recommend a motor driver for cost reason. If you need a 5V swing output from this output adjust the values of one of the two lower resistors in the divider. Enfin la vitesse de rotation des ventilateurs est exprimée en tour par minute, en RPM (Rotation per minute). Also the spec says the pulses from the Sense pin is 2 per revolution, so measure the pulses per second then divide by 2.Please specify what you will be using as switch.
Dans le meilleur des cas, l'homogénéité de votre contrôle de température sera jugée acceptable en moyenne. Comment brancher 9 ventilateurs sans en perdre le contrôle?si vous avez la flemme de lire tout mon pavay, dites moi juste comment vous branchez 9 ventilos 4 broches sur la asus crosshair tout en gardant leur contrôle total s'il vous plait ah cool ça, merci pour l'info, je viens de piger l'ineret des 4 broches Oui c'est possible si ta carte mère propose plusieurs connecteurs fans. Assuming you already have an efficient way to count the pulses it's very important to feed the switch with 5V (the limit for arduino). Tension d'entrée : 12V DC - 24 V DC. Should I put something like an optocoupler between fan and input pin, in order to isolate them?Just about the same question for controlling the speed. You can put it between the Arduino input and the ground or input and Vcc, but for this you will need to also move the switch to between the gnd and input. Or even a magnetic, inductive or capacitive sensor? I believe that it is 12V, but that would damage the board, right? En langue anglaise les ventilateurs se nomment fan.
Comment brancher 9 ventilateurs sans en perdre le contrôle?