Timeline for Why do we use a relay and switch to control on/off of horn circuit instead of using a simple swtich?
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Oct 29, 2017 at 1:50 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | Here is a video which describes how relays work (and cheap relay longevity). Mind you, there is strong language, so be warned. The author of the videos is quite animated, but is very knowledgeable on MANY subjects. | |
| Oct 29, 2017 at 1:45 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | Incase you cannot make it to the chatroom, the answer is simple ... the relay in and of itself doesn't increase or make the amperage higher. It has two electricity paths. One path is low amperage and is the control path. This turns the relay on and off (makes the connection for the second path). The second path is the high amperage path. When the low amp path is turned on, it energizes the coil, which "flips the switch" (sort to speak) and allows the electricity to flow on the high amp path. When the coil is de-energized, the path is cut off and electricity stops flowing. | |
| Oct 29, 2017 at 1:32 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | Can you meet me in The Pitstop, our chatroom? | |
| Oct 29, 2017 at 1:28 | comment | added | Diego Alves | I know that the relay was introduced to provide a higher amperage but I still don`t understand how the relay does it. | |
| Oct 28, 2017 at 19:38 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | Thanks for the add, @SolarMike ... To the OP, one thing I didn't clarrify here is, there are two separate circuits: one for the relay operated by the horn switch; the second for the horn which is operated by the relay. The horn switch circuit is low amperage, while the relay provides a high amperage circuit. Hopefully that helps clear things a little. | |
| Oct 28, 2017 at 19:31 | comment | added | Solar Mike | In the early days, relays etc were too expensive so all the wires were thicker and the currents for lights, wipers and horns etc all went through their respective switches. Even the starter solenoid was still manual until the late 50´s on some cars. One job was to clean the horn contacts on the steering wheel push button and the brush and brass track behind the wheel... | |
| Oct 28, 2017 at 19:27 | comment | added | Solar Mike | @DiegoAlves no he isn't - the relay is just a remote controlled switch and when you close it, the current flow is the same at all points in that circuit, as long as nothing else connected to that circuit is in use. If you want to know more search for Kirchoff's current law. | |
| Oct 28, 2017 at 18:34 | comment | added | Diego Alves | Your answer was very helpful because didn't understand why a device that requires more amperage would have thinner conductor either. But how exactly having a device that closes a contact by electromagnetism produces a high current? Are you saying that the current from RELAY TO HORN DEVICE is greater than RELAY TO GROUND? | |
| Oct 28, 2017 at 18:16 | history | answered | Pᴀᴜʟsᴛᴇʀ2♦ | CC BY-SA 3.0 |