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He has them as pullup via 10k resistors, -- Rob G4NQX

Hi all, I've just assembled my new BITX40. I'm receiving a lot of strong AM carriers in the European ham section (7000-7200), that are actually from broadcast stations in the 7200-7450 section (41m

Made two ugly AGC circuits for my BITX40s. ?Now audio in each is very smooth and even. Very worthwhile when using phones. ?See photos. Cheers - Noel

I have been following PD8W (Willem) progress on his build out of a lcd display/si5351. His code and hardware are listed at PD8W.com. After some hard work I have the display working - and looks like

I think DuWayne will agree that there's only so much you can do in a library to speed things up. Some libraries use floating point math and, without a math coprocessor to help things along, it is

DuWayne, Does the graphics library speed up the graphics by a significant amount? ?? It certainly looks interesting. I followed your journey with the SNAjr with interest.? I was doing something

I have been playing with a couple of different 32 bit alternatives to the 8 bit Arduino Nano that I had been using in most of my projects. I had tried several of the Teensy models both the LC and the

I thought the BITX40 PC board stand-offs would be suitable earthing points. But there is no continuity between them and the battery or psu ground.? Even the DDS stand-offs are not connected to

The hour is to debug an amp. ?Getting all that going on the Raduino and sorting out complete test procedures for the Bitx40 would take a month or two. ?Designing it is not trivial, but once done it

Rob, This is GREAT. Please email me (kc7rys @ gmail dot com) if you don't mind, I'd like to discuss a way to make this available for anyone, not just members of the group, if you're okay with that. --

Well, why not just go ahead and figure it out and post your work to the group? I've never heard of a kit or fully-wired rig come with such rudimentary test facilities before, so what you ask borders

Jerry: As you may know, I'm not an EE guy and when the magic white smoke gets out, I'm hard-pressed to figure out a way to put it back in. However, you know what's going on. Why don't you do a Muppet

As I have said several times already, I'd like to see these boards going out with some basic tools. ? 1) ?1khz square wave out of a Raduino digital pin to inject into the microphone, with suitable

This helps identify the interrupt pins for the Arduino family: | Board | Digital Pins Usable For Interrupts | | Uno, Nano, Mini, other 328-based | 2, 3 | | Mega, Mega2560,?MegaADK, Pro Mini | 2, 3,

Hey Jerry this is exactly what I was thinking when I got up this morning . Jerry-"Or your audio level is way down (bad microphone?) so you don't have enough drive into the final. ?A low audio level

Only pins 2 and 3 are interrupt driven. You mentioned you changed pins. May be worth a look. v/r Fred W4JLE Sent: Saturday, February 04, 2017 10:27 To: [email protected] Subject: [BITX20] Frequency

Agreed Joel, that was an excellent explanation. Thank you Jack and Rob. Also, it's not just the two year olds. My harmonics are 7 and 9. There are plenty of interrupts! 73 de KB1VNA

Check my sketch on w5kub fb page. Wiring same probably will work. Ron – PA3FAT Verzonden: 4 February, 2017 16:27 Aan: [email protected] Onderwerp: [BITX20] Frequency display refresh (or lack thereof)

Good explanation Jack, even I understood that. It was entertaining too:-) Joel KB6QVI

There are two ways to read an encoder: 1) polling, or 2) an ISR. Polling is easiest to code; you'd just stick a call in loop() to see if the encoder has moved on each pass through the loop. That would