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Source for CHEAP 4PDT or 4PST dip relays — Parallax Forums

Source for CHEAP 4PDT or 4PST dip relays

w4fejw4fej Posts: 264
edited 2014-05-12 10:40 in Propeller 1
I am looking for 8 dip relays for a Prop project where I have one microphone and want to switch it between 4 different radios. The mic cable is 8 pins and the radios also are 8 pins. Some of the pins have actual voltage on them, typically 8 VDC and some have ground etc.

There are plenty pf relays on Ebay but the price is through the roof, usually north of $20.00 EACH!. Anyone know of a source for 8 of these guys that won't break the bank?

OR

is there another way to switch 8 lines under Prop control that doesn't require mechanical relays??

Thanks, Mike B.

Comments

  • T ChapT Chap Posts: 4,223
    edited 2014-05-12 07:51
    That is not very clear when you say the mic cable is 8 pins. A typical (balanced) mic cable is 3 pins, high, low, GND. Do you need to switch a balanced signal(2 wires) or unbalanced(1 wire)? The only voltages on a mic cable would be around 48VDC for phantom power. Something doesn't add up with your pin count and strange voltages.
  • w4fejw4fej Posts: 264
    edited 2014-05-12 08:01
    T Chap wrote: »
    That is not very clear when you say the mic cable is 8 pins. A typical (balanced) mic cable is 3 pins, high, low, GND. Do you need to switch a balanced signal(2 wires) or unbalanced(1 wire)? The only voltages on a mic cable would be around 48VDC for phantom power. Something doesn't add up with your pin count and strange voltages.

    OK, my bad. These are communication microphones and radios ( amateur radio) and they are indeed 8 pin connectors, some 8 pin round and some are RJ45 connectors..

    Mike B.
  • T ChapT Chap Posts: 4,223
    edited 2014-05-12 08:07
    http://www.allelectronics.com


    This is a cheap place to buy some things, maybe you will see a part that works for you.
  • PublisonPublison Posts: 12,366
    edited 2014-05-12 08:40
    Try ElectronicGoldmine

    a    nd

    Jameco
  • richaj45richaj45 Posts: 179
    edited 2014-05-12 10:32
    You could try and use DPDT relays in series to get the switching you need.
    It may take more pins from the micro but they are very chip relays from many surplus places.

    cheers,
    rich
  • w4fejw4fej Posts: 264
    edited 2014-05-12 10:40
    richaj45 wrote: »
    You could try and use DPDT relays in series to get the switching you need.
    It may take more pins from the micro but they are very chip relays from many surplus places.

    cheers,
    rich

    I located some 8 channel relay boards on Ebay for $7.50 each that would do the trick and I actually have one here in front of me which I may just use. I wanted something a bit smaller but even with four boards space wouldn't be an issue. The price is right so I'll probably just do that as 4PDT relays are just too expensive and I'd need 16 of the stupid things..

    Mike B
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