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Old Sep 28, 2012, 07:43 PM
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Quote:
Originally Posted by Thidsa View Post
Haha yes im sure your right, it just sounded bad...
Yes i know that about the voltage and crossing rssi's.
I just cut power to one rx at a time...was that wrong?
Ill try it again and just let the relay be on with the helix, that works.
When i wear it out i will ask you for a new one haha

you know if its possible with just a y-cable for the audio(gps)?
hi Bjoern,

if the relais switches to the audio signalcoming from the rx with the better reception then your soldering was o.k.
if the relais tears out - you´re welcome to my hobby-room and i´ll change the relais for you

it´s not good to mix 2 signals directly ... like an y-cable. doing so may destroy the output amplifier and you´ll get more noise than usable signal.

cheers Thomas
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Old Sep 29, 2012, 05:57 AM
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Ok Thomas.
Thank you for your kind help, very appreciated

Bjoern
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Old Sep 29, 2012, 12:46 PM
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Had to struggle a couple hours more, but finally got it in the end
It also work right too, relay turns on when spw antenna is selected...
Great

Thanks again Thomas
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Old Sep 29, 2012, 03:43 PM
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Old Oct 05, 2012, 11:32 AM
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Well id didnt go as planned. The relay sounded like a machinegun sometimes because the diversity changed rx so much.

Bjoern
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Old Oct 05, 2012, 11:59 AM
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Quote:
Originally Posted by Thidsa View Post
Well id didnt go as planned. The relay sounded like a machinegun sometimes because the diversity changed rx so much.

Bjoern
Hi Bjoern,
this happens when both receivers have nearly the same rssi.
somewhere in the middle of the diversity pcb is a potentiometer,
turn it 45° counterclockwise to make the diversity less sensible.

cheers Thomas
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Old Oct 05, 2012, 12:20 PM
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Quote:
Originally Posted by Thint1 View Post
Hi Bjoern,
this happens when both receivers have nearly the same rssi.
somewhere in the middle of the diversity pcb is a potentiometer,
turn it 45° counterclockwise to make the diversity less sensible.

cheers Thomas
Ehh, it is not there on the bevrc one, i know there is on the rangevideo one tho...
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Old Oct 05, 2012, 02:00 PM
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I'm not very familiar with the Tiny uC's used on these boards. I believe the I/Os are rated at 40mA? With that and inductance of the coil in mind, is it OK to wire a relay coil directly to the I/O?

I ask because my LM358 didn't put out enough current to switch a large 5V relay I had on hand. It did consistently latch a 3V/65ohm relay, but there was only 1.5V across the coil (Vcc = 5V). 358's are rated for continuous SC (~40mA). OTOH, driving the 5V coil with a fet seems like the better way to go. Any thoughts?

I currently have a 358 buffer on the PRG pin of my micro diversity. It drives a status LED, and I'm using the other half to drive the relay. As mentioned it works with a 3V relay, but I don't like running parts on the edge.

Kev

[edit: I attached a schematic of a speaker relay/LED mod I just brewed up. All I had on me was SMT nFETs, and an IRLM510, and that is waaaay overkill. Really you can use any nFET you want, but diode protected versions are better at switching coils. Even with my SMT FET I could put up to 2A of bells and whistles on there, yet my PRG pin never sees more than 2M2 (I didn't have 1M... doesn't matter). ]
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Old Dec 21, 2012, 11:36 PM
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hi guys any idea on the power jack which one is - and + on the jack
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