Has anyone built or bought some kind of 4-indicator for this? I want to do this as a temporary indicator while I am playing with a pair of UM BCD-14 band decoders.
Easy enough ... 4 NPN transistors - base to BAND0-3 pins, LED and limiting resistor between +13.8 and collector of the transistors, emitter of the transistor to ground. > The 0000 output on the KIO3 for 60M has me concerned. Don't know why it should concern you. 0000 is just another state and I don't see 0000 used for any other band *or* any transverter band. Your bigger concern might be the reuse of one of the other band values for 2 Meters depending on how you decode HF vs. the transverter bands. 73, ... Joe, W4TV On 1/27/2013 6:29 PM, N2TK, Tony wrote:
I would like to see (LED) the state of the BAND0-3 outputs. Has anyone built or bought some kind of 4-indicator for this? I want to do this as a temporary indicator while I am playing with a pair of UM BCD-14 band decoders. The BAND0-3 outputs come off of 5V through 2.2K pull-up resistors with a 220 ohm resistor in series with the output on the ACC socket. It would seem standard 20ma LED's would not work here with the 2.2K resistor inline. Maybe a diode inline to isolate with a separate supply on the LED's or use some very low amperage LEDs or drive a Mosfet which drives a LED? The 0000 output on the KIO3 for 60M has me concerned. I want to make sure it doesn't cause me a problem when switching between 160-2M and between auto antenna selection and manual antenna selection. Tnx for any feedback. 73, N2TK, Tony ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
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