2 simple but useful ways to use relays

Car DIY / Electronics

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2 simple but useful ways to use relays
1. Secret in auto
2. Management of power windows or any motor with constant power

Sitting at home and suffering from idleness, I decided to look at my old notes craftswhen I was still working at the service station. I found a couple of simple but useful relay connection schemes. I do not claim authorship, but I thought of it myself. So let's start:

1 circuit is a simple secret for a car, it uses a reed switch and a relay, the reed switch is located in a convenient place for you but not visible to outsiders.

Wiring diagram

How it works! In the diagram where indicated ENTRANCE, minus the power goes to the relay, and plus this is a wire going for example from a gasoline pump or relay supply + to nozzles, etc. We cut it, connect one end to one contact of the circuit, the other to the second. We hide the reed switch in an accessible place for you but not for the eyes of strangers: fellow:. When the magnet is brought to the reed switch, it closes, thereby giving a plus relay, the relay also closes and the contacts are connected. Now the plus goes through the contact group of the relay and not the reed switch, remove the magnet and everything works

. The only thing you need to remember is that you do not need to put such a secret on a high load, since the contacts of the reed switch can burn! And so this secret can be used everywhere, the main fantasy !!!

The following diagram will be useful, for example, who wants to install windows or simply control the motor by adjusting the direction of rotation. This compound was also invented for a mug of coffee. : winked:
Wiring diagram

In this example, a five-pin relay is needed !!! note that the motor filed two pluses !!! When the upper contact (S3) is pressed, the relay closes, the contact group of this relay switches and a minus sign appears on the motor in the upper part (if you look at the figure). When the lower contact (S4) is pressed, contact group 2 of the relay switches and a minus sign appears on the motor at the bottom. Thus, by pressing the buttons, you can control the direction of movement of the motor! Such a connection has been used on many power windows that still work. You can of course also put the limit switches in the power supply gap when the glass is at the top or bottom.

From myself, I want to add that I connected the circuit 2 more than once with me, in power windows, central vacuum locks (a little refinement is needed here, a couple of diodes). I hope these connection schemes will be useful to someone.

There will be questions, write in the comments if something is not clear.

Thank you for your time reading this article !!!

Below is a photo of the relays and reed switches that I used !!!

Good luck in your work !!!