new project i'm doing and need some help with power

[bazza_11]

So, i'm doing new project with my uni, its getting high power (120V) in with 1kW power limit
my question is, as i'm using raspberrypi 3b it there something you recommend to control the power to raspberrypi and to other subsystem?

i'll have multiple sensors (that could be powered by the raspberrypi itself) but i have a heating element that require about 600-800 Watts


thanks

[pcmanbob]

Hi.

Assume by this "raspberrypi 3b it there something you recommend to control the power to raspberrypi and to other subsystem" you mean, "How do you power the Pi".
You will need one of these, :- http://uk.rs-online.com/web/p/plug-in-p ... y/9098126/ ( as no location specified have just linked UK supplier as example )

As for this line "but i have a heating element that require about 600-800 Watts" are you saying you want to control this from the Pi ?

[Burngate]

You may find this useful:
http://www.pwrusb.com/powerUSB-basic.html

[bazza_11]

Hi.

Assume by this "raspberrypi 3b it there something you recommend to control the power to raspberrypi and to other subsystem" you mean, "How do you power the Pi".
You will need one of these, :- http://uk.rs-online.com/web/p/plug-in-p ... y/9098126/ ( as no location specified have just linked UK supplier as example )

As for this line "but i have a heating element that require about 600-800 Watts" are you saying you want to control this from the Pi ?

will, yeah technically. sorry i'm bad at explaining stuff without drawing them out. (attached picture)
Ok so i have a power source coming it, it will power the Pi and the two hotplates.
Then the Pi will be connected to 3 sensors. Also i want it to be connected to the hotplate so i can say turn it on and off
can the pi do that?

[bazza_11]

You may find this useful:
http://www.pwrusb.com/powerUSB-basic.html

sweet, ya this one aspect that i need, thanks

[texy]

Hi.

Assume by this "raspberrypi 3b it there something you recommend to control the power to raspberrypi and to other subsystem" you mean, "How do you power the Pi".
You will need one of these, :- http://uk.rs-online.com/web/p/plug-in-p ... y/9098126/ ( as no location specified have just linked UK supplier as example )

As for this line "but i have a heating element that require about 600-800 Watts" are you saying you want to control this from the Pi ?

will, yeah technically. sorry i'm bad at explaining stuff without drawing them out. (attached picture)
Ok so i have a power source coming it, it will power the Pi and the two hotplates.
Then the Pi will be connected to 3 sensors. Also i want it to be connected to the hotplate so i can say turn it on and off
can the pi do that?

Short answer is yes, the Pi should be able to do all that. Longer answer is more questions - What are these sensors you mention?

Texy

[bazza_11]

Hi.

Assume by this "raspberrypi 3b it there something you recommend to control the power to raspberrypi and to other subsystem" you mean, "How do you power the Pi".
You will need one of these, :- http://uk.rs-online.com/web/p/plug-in-p ... y/9098126/ ( as no location specified have just linked UK supplier as example )

As for this line "but i have a heating element that require about 600-800 Watts" are you saying you want to control this from the Pi ?

will, yeah technically. sorry i'm bad at explaining stuff without drawing them out. (attached picture)
Ok so i have a power source coming it, it will power the Pi and the two hotplates.
Then the Pi will be connected to 3 sensors. Also i want it to be connected to the hotplate so i can say turn it on and off
can the pi do that?

Short answer is yes, the Pi should be able to do all that. Longer answer is more questions - What are these sensors you mention?

Texy

ya, i was wondering, how many sensors that can be connected to the PI?
these sensors require about 3-3.6V and about 900-1500 uAmp (i'll have about 3-4 of those)

[Burngate]

ya, i was wondering, how many sensors that can be connected to the PI?
these sensors require about 3-3.6V and about 900-1500 uAmp (i'll have about 3-4 of those)

Much will depend on the sensors (are they simple on-off, or more complicated - i2c for example?)
The 3v3 supply on the Pi could easily supply the 6mA required by four sensors each wanting 1.5mA, through the header.

[bazza_11]

ya, i was wondering, how many sensors that can be connected to the PI?
these sensors require about 3-3.6V and about 900-1500 uAmp (i'll have about 3-4 of those)

Much will depend on the sensors (are they simple on-off, or more complicated - i2c for example?)
The 3v3 supply on the Pi could easily supply the 6mA required by four sensors each wanting 1.5mA, through the header.

ya, they are bit more complicated, they are thermocouples (Maxim MAX31855 (https://www.maximintegrated.com/en/prod ... 31855.html) ).
Cool, i was bit concerned about if i got 4-5 sensors. and if i can connect all of them to the PI and power them all at the same time.

Thanks

[DougieLawson]

Like this: viewtopic.php?p=1111944#p1111944

[bazza_11]

Like this: viewtopic.php?p=1111944#p1111944

Thats amazing! almost the same thing, Thank you very much