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You can use a dual color LED with 3 leads, centre is common gnd.

I have used a standard 3mm LED , you can also use 5 mm if you need, but the 3 mm is quite Ok

The 680 ohms is the dropping and current limit resistor, I have tapped the 2 wires from the K1 relay which alternates the +12V between Rx and Tx

73 Pop

VU2POP

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From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 11:11 AM
To: [email protected]
Subject: Re: [BITX20] RX and TX LED

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Thank you VU2POP. Is the yellow wire for RX and the green wire for TX and then the 680 ohm resistor goes to ground? Is the LED 12 volts? I was planning on using a Red 3.3 volt LED to indicate TX and a green 3.3 volt LED to indicate RX

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73

Ben

Kd2nou?

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On Mon, Nov 6, 2017 at 12:37 AM Prathap Naidu <vu2pop@...> wrote:

Hi ben

See attached pics, solder 2 wires below the K1 relay as shown, then to the Dual color LED , the centre of the LED goes to ground thru a 680 Ohms restistor.

Have fun

happy Bitxing

73 Pop

VU2POP

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From: [email protected] [mailto:[email protected]] On Behalf Of Ben Piecora
Sent: Monday, November 06, 2017 2:51 AM
To: [email protected]
Subject: [BITX20] RX and TX LED

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Hi Everyone,

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Could anybody tell me a way I can pull voltage from the board for an LED on RX and then pull voltage from the board for a TX LED and turn off the RX LED?

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Thanks

Ben

KD2NOU

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Ben

KD2NOU

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Ben

KD2NOU