My project consists of taking 5 analog inputs from 5 pressure transducers (air if that matters), and sending them to a LCD to display pressure. So my question is can I power all 5 (5 Vdc) pressure transducers from the Arduino Uno board pin? Or would I have to have a separate power supply? Any help would be appreciated.
Tynkup:
My project consists of taking 5 analog inputs from 5 pressure transducers (air if that matters), and sending them to a LCD to display pressure. So my question is can I power all 5 (5 Vdc) pressure transducers from the Arduino Uno board pin? Or would I have to have a separate power supply? Any help would be appreciated.
More then likely you can power all four sensors from the arduino's shield 5V pin as they don't usually require much current to operate, but the datasheet for the sensor is where the facts will be.
Lefty
Thanks for the reply. I'm getting the transducers off ebay and this is what I got so far.
Input: 0-100 psi.
Output: 0.5V – 4.5V linear voltage output. 0 psi outputs 0.5V, 50 psi outputs 2.5V, 100 psi outputs 4.5V.
Works for oil, fuel or air pressure. Can be used in oil tank, gas tank, etc.
Accuracy: within 2% of reading (full scale).
Thread: 1/8” NPT.
Wiring connector: water sealed quick disconnect. Mating connector is included.
Wiring: Red: +5V. Black (yellow): ground. Blue (green): signal output.
It is an advance pressure sender than traditional mechanical pressure sender.
If the Arduino can't supply enough voltage, what would options be? Is there a shield I can install to increase the 40mA to 1-2 amps? Or would i have to purchase a different board?
Tynkup:
Thanks for the reply. I'm getting the transducers off ebay and this is what I got so far.Input: 0-100 psi.
Output: 0.5V – 4.5V linear voltage output. 0 psi outputs 0.5V, 50 psi outputs 2.5V, 100 psi outputs 4.5V.
Works for oil, fuel or air pressure. Can be used in oil tank, gas tank, etc.
Accuracy: within 2% of reading (full scale).
Thread: 1/8” NPT.
Wiring connector: water sealed quick disconnect. Mating connector is included.
Wiring: Red: +5V. Black (yellow): ground. Blue (green): signal output.
It is an advance pressure sender than traditional mechanical pressure sender.Well those specs don't state how much +5vdc current is required by the sensor, maybe a link to the offering might help?
If the Arduino can't supply enough voltage, what would options be?
It's not an issue with voltage, the arduino can supply +5vdc, the sensor states it requires +5vdc. What is not stated is how much +5vdc current the sensor consumes. The arduino can supply a finite amount of current at +5vdc for external circuitry and components, but it's in the 300-400ma range.
Is there a shield I can install to increase the 40mA to 1-2 amps? Or would i have to purchase a different board?
Where are you getting the 40ma value from. That is the current limit of a single digital output pin, not how much current the shield 5V pin can supply. If your project requires more then say 400ma of +5vdc current then you simply have to add an external voltage source (DC power supply or module) rated in excess of your current requirements.
Lefty
If you want to switch the sensors ON/OFF with the arduino, each sensor must not exceed 40mA current.
The next limit would be the USBs 500mA current limit while youre buisy with coding/debugging.