Looking for some help here with my WiFi Chicken Door. I have a 12V 3A Linear Actuator and a 12V DC power suppy as well as a Wifi Controller. What I am looking for is guidance on the correct polarity reversing relay. It appears I need a DPDT relay but not sure which one to get and how to wire it to reverse polarity when power is supplied via the wifi switch. What should the Amp rating be and how should it be wired? Any help is greatly appreciated.

 

What you really need is two spdt automotive relays. They have dual sockets too. You also need limit switches that can handle around 250mA. Need to check the datasheet. Two diodes to go across the relay coil. 1n4001 is fine. That method will give you dynamic braking. You can control it with hopefully an SPDT relay on your controller. You can make on or off open or closed. Im on my cell.

 

You also need to detect that there are no chickens in the doorway when you close it or you will be eating chicken quite often.

 

What you really need is two spdt automotive relays. They have dual sockets too. You also need limit switches that can handle around 250mA. Need to check the datasheet. Two diodes to go across the relay coil. 1n4001 is fine. That method will give you dynamic braking. You can control it with hopefully an SPDT relay on your controller. You can make on or off open or closed. Im on my cell.

I'm pretty sure there are din relays now that do all that by combining into one. Does this not accomplish the same? https://www.amazon.com/Reverse-Pola..._85:2470955011&rnid=2470954011&rps=1&sr=8-118

 

Link: https://www.parts-express.com/search?order=relevance:desc&keywords=automotive relay sockets

Looks like they are not selling the dual sockets anymore.

Basic starting point diagram is: https://www.parts-express.com/pedoc...wiring-diagrams-installation-guide.pdf#page=8

Looks like you can make a DIN rail mounted one by first making a PCB: https://customconnector.com/wp-cont3nt/uploads/2017/10/CustomConnector_Full_Catalog.pdf#page=32

The idea behind the relays is the terminals face downward to let water fall out and you screw surface mount.
So, you could mount them on the typical back panel and use a bunch of DIN rail terminals to make the connections.
You can also place the diode in a style of dual terminal blocks. Use jumpers, etc.

e.g. Use 4 dual terminal blocks for the coil. Two of the blocks would have diodes. One 4-pole jumper and two 2 pole jumpers.
One end cover.

Single feed thru blocks, sets of 3 for the SPDT contacts with a partition cover and an end cover.

Does this not accomplish the same? https://www.amazon.com/Reverse-Pola..._85:2470955011&rnid=2470954011&rps=1&sr=8-118

That looks like a chicken chopper.

 

You also need to detect that there are no chickens in the doorway when you close it or you will be eating chicken quite often.

Apparently in certain countries some chickens don't know how to get out of the way of a closing door.

 

Apparently in certain countries some chickens don't know how to get out of the way of a closing door.

The door would be closing via remote and there will be a guard to nudge the gals away. No danger.

 

Link: https://www.parts-express.com/search?order=relevance:desc&keywords=automotive relay sockets

Looks like they are not selling the dual sockets anymore.

Basic starting point diagram is: https://www.parts-express.com/pedoc...wiring-diagrams-installation-guide.pdf#page=8

Looks like you can make a DIN rail mounted one by first making a PCB: https://customconnector.com/wp-cont3nt/uploads/2017/10/CustomConnector_Full_Catalog.pdf#page=32

The idea behind the relays is the terminals face downward to let water fall out and you screw surface mount.
So, you could mount them on the typical back panel and use a bunch of DIN rail terminals to make the connections.
You can also place the diode in a style of dual terminal blocks. Use jumpers, etc.

e.g. Use 4 dual terminal blocks for the coil. Two of the blocks would have diodes. One 4-pole jumper and two 2 pole jumpers.
One end cover.

Single feed thru blocks, sets of 3 for the SPDT contacts with a partition cover and an end cover.



That looks like a chicken chopper.

So using this relay, where would you connect a timer? would you need any jumpers?

 

The contact rating is probaby too low.

I;ll point you to this thread: https://forum.allaboutcircuits.com/...house-roof-window-control.134958/post-1130917

motor-limits.pdf has a lot more options.

Your "timer" needs to have an SPDT dry contact, Your salon relay might be able to provide that.

The two automotive relays is probably the best choice for the motor. When the motor turns off, the motor acts as a generator while it's coasting. The relay shorts the motor, so it stops really fast.

If the two relays in motor-limits.pdf are both on or both off, the motor is stopped. The limit switch has to handle the relay coil current.

 

So here’s what I got and need help wiring together and here’s what I am wanting to do. Please help me with wiring diagram!! Successful completion earns you a prize!!

1. Timer opens current for 30 seconds to open chicken door, then shuts off. 12 hours later, timer opens current again for 30 seconds to close chicken door.

Power Supply…………

AmazonSmile: Universal AC/DC Adapter, CUGLB 30W Multi Voltage Switching Power Supply with 8 Tips and 5V 2.1A USB Port for 3V/4.5V/5V/7.5V/9V/12V Household Electronics and LED Strip: Home Audio & Theater



WiFi Timer…………

MHCOZY 1 Channel USB 5V AC/DC 7-32V Smart WiFi Wireless Relay Switch Module, Tuya Smart Life app Remote Control, Work with Alexa Google Home (1) - - AmazonSmile



Relay Switch…………

Amazon.com: Motor Reverse Polarity Relay, Dc 5/6/9/12V Time Adjustable Delay Relay, 2A Drive Current: Industrial & Scientific



Linear Actuator………..

MAOPINER DC12V 12inch Stroke Linear Actuator with Mounting Bracket 900N(225lbs) Maximum Lift 10mm/s for Recliner TV Table Lift Massage Bed Electric Sofa Linear Actuator: Amazon.com: Industrial & Scientific