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Meso stealth pro knob help

Discussion in '3rd Gen. Tacomas (2016+)' started by poke_taco, Dec 5, 2019.

  1. Dec 5, 2019 at 7:18 PM
    #1
    poke_taco

    poke_taco [OP] Well-Known Member

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    I just scored a stage 2 stealth pro knob with the 2 buttons. I want to use the second button for some LED lights but being that the button is a momentary type I’m going to need a latched relay for the lights to stay on when the button is pressed and turn off when it is pressed again. I have no experience with relays or wiring them, can somebody tell me what brand/type of relay I will need? Or if you have experience with a relay to be used with a momentary switch what did you use? Theres all different types of relays and I don’t know what is what lol.
     
  2. Dec 5, 2019 at 7:47 PM
    #2
    CaptainTikihut

    CaptainTikihut Well-Known Member

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    Have you tried calling MESO for tech support? Maybe they can help.
     
    GreyBaldTaco likes this.
  3. Dec 5, 2019 at 7:56 PM
    #3
    Captqc

    Captqc Well-Known Member

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    What is a latching relay?


    A latching relay is a two-position electrically-actuated switch. It is controlled by two momentary-acting switches or sensors, one that 'sets' the relay, and the other 'resets' the relay. The latching relay maintains its position after the actuating switch has been released, so it performs a basic memory function.
    The latching relay is similar to a two-position ('double throw') toggle switch. The handle of a toggle switch is physically pushed to one position, and it stays in that position until pushed to the opposite position. A latching relay is electrically 'set' to one position, and it remains 'latched' in that position until it is electrically 'reset' to the opposite position.

    There are two kinds of latching relays:
    An electrically latched relay is a standard relaywith one of its own contacts wired into its coil circuit. An external switch initially turns the relay on, then it is kept on by its own contact. An external reset switch interrupts power to the relay, which turns it off. A bistable, or mechanically latched relaytypically has two internal coils and an internal latch mechanism. Energizing one coil 'sets' the contacts in one position, and the contacts stay in that position until the 'reset' coil is energized.
    The differences are:
    Electrically latched relay -

    • Uses a standard single-coil relay,
    • Always resets when power is turned off,
    • One contact is dedicated for latching control,
    • 'Set' switch is a normally-open contact,
    • 'Reset' switch is a normally-closed contact. Mechanically latched relay -
    • Uses a dual-coil relay,
    • Maintains its position when power is turned off, so the circuit will be in the same state when power is turned on again,
    • All contacts are available for other circuit functions,
    • 'Set' and 'Reset' switches are both normally-open contacts.
    The two schematic wiring diagrams below show how to wire an electrically latching relay circuit. This creates a basic memory function... the relay 'remembers' which switch was pressed last.

    For mechanical latching relays, click here.
    In these circuits, the 'Set' switch is any normally-open switch or relay contact, such as an MRD1 train detector. The 'Reset' switch is any normally-closed switch or relay contact. When the 'Set' switch is pressed, the relay turns on. The relay stays on even after the 'Set' switch has been released because the relay coil (connections K1 and K2) now receives power through its own contact (connections 2C and 2NO).

    When the 'Reset' switch is pressed, power to the relay coil is interrupted, causing the relay to turn off. This breaks the connection through contact 2C-2NO, so the relay stays off.

    This type of memory circuit is called 'volatile' memory because when the power supply is turned off, the relay returns to its off state. When the power supply is turned back on, the relay will stay in its off state until the 'Set' switch is pressed.

    The relay used here is any standard relay with two or more sets of contacts, or 'poles' (DPDT, 3PDT, 4PDT, etc.) such as the MRAPR auxiliary power relay. The MRAPR relay includes diodes across the coil to protect the switch contacts from 'flyback' voltage, and it can be used in both AC and DC circuits.

    See the note about switch contact ratings.

    This first schematic is a circuit where the 'Set' switch has priority. This means that if both the 'Set' and 'Reset' switches are pressed at the same time, the relay will turn on.

    [​IMG]
    The next schematic shows a circuit where the 'Reset' switch has priority. If the 'Set' and 'Reset' switches are pressed simultaneously, the relay will turn off.

    [​IMG]

    For mechanical latching relays, click here.

    [​IMG] Azatrax MRAPR-9v DPDT relay
    • contacts: 8 amps, 30 volts
    • Coil 8-14 volts, AC or DC
    • Coil resistance 200 ohms
    • On-board LED indicator
    • Flyback protection diodes MRAPR-9v $9.50
    Azatrax MRAPR-12v DPDT relay
    • contacts: 8 amps, 30 volts
    • Coil 10-17 volts, AC or DC
    • Coil resistance 360 ohms
    • On-board LED indicator
    • Flyback protection diodes MRAPR-12v $9.50
    [​IMG] Regulated DC 'wall wart' power supplies
    • Filtered, regulated DC output
    • 9 volts 650 milliamps or 12 volts 600 milliamps
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    • Ideal power source for electronic circuits 9v 650mA $9.50
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    [​IMG] Home | Detectors | Relays | Signal Flashers | Bell Ringer
    Power Adapter | How to order | Support | Contact | Links
    © copyright 2009-2018 Azatrax LLC, Longmont, Colorado
     
  4. Dec 6, 2019 at 10:31 AM
    #4
    poke_taco

    poke_taco [OP] Well-Known Member

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    I have, hasnt gotten back to me yet
     
  5. Dec 6, 2019 at 12:22 PM
    #5
    LivinOnEdge

    LivinOnEdge ✧゚・:*¯\_(ツ)_/¯*:・゚✧ Sarcastic Fairy Dust

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    He'll respond, it hasn't even been a day. Although he usually responds pretty quickly.
     
    eurowner likes this.
  6. Dec 6, 2019 at 12:36 PM
    #6
    mutely

    mutely Well-Known Member

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  7. Dec 6, 2019 at 1:04 PM
    #7
    poke_taco

    poke_taco [OP] Well-Known Member

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    Thanks man, so using this relay will need 2 separate 12v source? Would I just be able to split the 12v source to two leads and wire them to the relay?
     
  8. Dec 6, 2019 at 5:01 PM
    #8
    mutely

    mutely Well-Known Member

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    you can split the 12v. If you do 12v with ignition it’ll reset itself when you turn ignition off.

    I haven’t personally used that relay, but it’s designed to do what you want. There are other options on Amazon, all are wired the same way.
     
  9. Dec 6, 2019 at 6:33 PM
    #9
    poke_taco

    poke_taco [OP] Well-Known Member

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    I got a blue sea fuse block and I’ll be running the 12v off of there with a fuse and splitting it to wire into the relay. Does that sound okay?
     
  10. Jul 23, 2020 at 4:05 PM
    #10
    11seneclu

    11seneclu New Member

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    Did this ever work for you? Looking to do the same
     
  11. Jul 23, 2020 at 4:15 PM
    #11
    RyanDCLB

    RyanDCLB Well-Known Member

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