Go to advanced search

by Deo joseph
Sat Apr 15, 2017 5:21 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

hi..
which are the electromechanical relays suitable for controlling the fluorescent lamp with electronic ballast???
by Deo joseph
Fri Apr 07, 2017 5:07 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

Hi..
Please guide me..What will be the form factor (Physical area occupancy) if i am using 48
G7L-1A-BUBJ-CB-DC12 relays.
http://www.mouser.in/ProductDetail/...- ... kecf2Puw==
by Deo joseph
Thu Apr 06, 2017 9:47 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

make sure you use a ULN2803A the A is important as this version has diode protection built in to protect the transistors from back emf from the relay coils. As for the psu I would think you will need to build one as you will need 7-8A at 12v and 7A at 5v, I doubt you will find one on the shelf to d...
by Deo joseph
Thu Apr 06, 2017 3:38 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

hi.. with all Your inputs i am planning to go ahead with my project.. this is what i am doing.. Pi-3>> I/O Port Expander (MCP23017)>>Relay driver(ULN2803)>>Relay(G7L-1A-BUBJ-CB-DC12)>>AC Lamps G7L Specs:- Coil Voltage: 12VDC , Coil Current: 158 mA Switching voltage: 250AC , Contact Current Rating: 3...
by Deo joseph
Wed Apr 05, 2017 10:26 am
Forum: Beginners
Topic: Drive 12V relay
Replies: 2
Views: 424

Drive 12V relay

hi everyone..
i need a power supply to drive relay coil (12V DC).
i am planning for dual output power supply with 5V and 12V dc output so that i can power up both Pi-3 and Relay.
i need to power up 48 relays whose coil voltage is 12V DC.
What should be the current rating of the supply?
.
by Deo joseph
Tue Apr 04, 2017 12:14 pm
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

OK.. Thank you for all your inputs..
by Deo joseph
Tue Apr 04, 2017 11:35 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

You might find something here http://uk.rs-online.com/web/c/relays/solid-state-relays-accessories/solid-state-relays/#esid=4294957874&applied-dimensions=4294529384,4294530389,4294535071 At 3V 10mA Pi gpio could drive one of these directly. If you need to control more than one use some other switchi...
by Deo joseph
Tue Apr 04, 2017 10:56 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

One more question do i need to use optocouplers is it necessary?
by Deo joseph
Tue Apr 04, 2017 10:55 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

Thank you..That was a great help!
by Deo joseph
Tue Apr 04, 2017 10:42 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

Ya not possible from GPIO pins..If i use a driver IC TPL7407L..?
by Deo joseph
Tue Apr 04, 2017 10:17 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

What if i make use of this relay.. http://www.digikey.com/product-detail/e ... -ND/404546 for my project..
by Deo joseph
Tue Apr 04, 2017 4:02 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Re: Relays

Thank you..
by Deo joseph
Sat Apr 01, 2017 4:56 am
Forum: Automation, sensing and robotics
Topic: Relays
Replies: 33
Views: 3845

Relays

Hi..
I am using pi-3 to control electrical appliances like fluorescent lamps (inductive load).
Anyone please suggest me which relay should i use?
Requirements:
DC controlled relay(5-12V), AC switching(230VAC/20A)
I need a industry standard highly reliable Electromagnetic relay..
by Deo joseph
Fri Mar 31, 2017 10:41 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to get 48 digital output pins on Raspberry Pi-3?
Replies: 5
Views: 2282

Re: How to get 48 digital output pins on Raspberry Pi-3?

The information was helpful..Thank you for the Quick Replies..
by Deo joseph
Fri Mar 31, 2017 10:13 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to get 48 digital output pins on Raspberry Pi-3?
Replies: 5
Views: 2282

Re: How to get 48 digital output pins on Raspberry Pi-3?

Thank you for the reply that was helpful..
One quick question..what is the maximum current i can source/sink on GPIO pins of Pi-3.
how much load it can take?
since i need 48 digital outputs how much current i can draw from each pin?
by Deo joseph
Fri Mar 31, 2017 6:47 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to get 48 digital output pins on Raspberry Pi-3?
Replies: 5
Views: 2282

How to get 48 digital output pins on Raspberry Pi-3?

Hi..
i am using Raspberry Pi3 board and i would like to control 48 electrical appliances (Fluorescent lamps)..so i need minimum of 48 digital output pins but board has got only 26 can anyone please help in this regard?

Go to advanced search