1. J

    Fan Tachometer signal to on/off state

    Hi guys, I have a fan tachometer signal that is faster than my PLC can manage to read. Is there any readily available PCBs out there, that would be able to take the tach signal, analyse it, and provide a simple ON/OFF output based on the speed?
  2. kidhu

    Op amp Circuit schematic diagram using proteus

    Can anyone provide circuit schematic diagram using proteus that, control the room fan speed (rpm) by the temperature of the room and control the room light (on/off) by the room light intensity using the thermistor and LDR and op amps?
  3. dmarciano84

    DC Fan PWM/Speed Sense

    I am working on a project (based on the PIC16F18877) to which I am planning on adding a PWM DC brushless fan. However, I have never had to work with PWM before (or even DC fans) so there are a few things I am not clear on that I am hoping to get clarification on. I just want to make sure I...
  4. S

    Adding Potentiometer to Fan (consumer product)

    Hello, I have a sleeping sound machine that uses a Fan to create white noise. It has a 3 position Switch, "off", "high speed", and "low speed". Essentially, these settings are either too loud or too quiet. I would like to remove the 3 setting Switch and replace it with a Potentiometer to...
  5. ashokraj

    what is the inductance and resistance of the fan we can use for simulation purposes

    I want to simulate a AC ceiling fan operating with 240V. I want to add some external electronic circuit. I would like to analyze the behavior of the fan circuitry depending on my inputs. so could some one please tell me the inductance and resistance of the fan ?
  6. ashokraj

    how can I determine the Resistanc and capacitance value in a snubber circuit

    Hi, In the below circuit I would like to know how to determine the the resistance(R9) and capacitance(C6) value ? This circuit is a IOT based fan controller. Here we are using 240VAC, Even though they have shown the values I am interested in knowing how to design a RC snubber circuit for a fan...
  7. sofitens

    Wiring a NC relay for an AC condenser fan

    I'm planning for a project where I need a NC relay with a 24 VAC coil to disable my AC condenser fan, and I could use help selecting a correct relay to use and ensuring it's wired correctly. The condenser fan (OFM in the 1st diagram) is pretty typical with 3 wires, 1 coming from the contactor...
  8. yverde

    Current limiter for fan

    Hey, I'm am trying to use computer fans for other purpose, I tried hooking one up to a 12v power source and it blew up. The fan was rated 12v, but 0.37A and I used a 12v, 2A power supply, I thought the fan would use only the current it needs, but I was obviously wrong. So my question is can I...
  9. qwaspen

    Car fan auxiliary heater

    Hi! Got a problem with my auxiliary heater. I connected an auxiliary heater to my car and everything was working great. However, when I added the wiring harness for the car fan, it won’t work. I can only measure 5v at the relay, which is odd since it should be 12v. In addition to this, the car...
  10. B

    Solar emergency light/fan circuit help needed

    Hello great team! I'd immensely appreciate the help of brilliant minds out here. I've Solar rechargeable emergency unit that can power 2 lights and a small table fan. The unit stopped working with a blown resistor on the circuit. I did try replacing the resistor with an identical color coded...
  11. M

    Max fan current from MB in Samsung TV

    Hi, I need to replace the fan in a Samsung TV but not sure about max amperage on the MB fan port. The original one is 12v and 70mA but I can't find a like for like fan. Need to improvise. I have a few candidates with similar mount and CFM and on 12v but at 100mA or more. The MB is BN40-0012A...