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Wait a minnit. I think I understand what they're so horribly trying to say. When input pullup is NOT used, a floating connection is low (or presumably low). So in order to get it to do something your

As I stated when I put it there, it came from the Arduino docs. Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

Ah, very nice. And 6 more bytes! ? They all count! Regarding pullups, this statement isn't exactly correct, but I think I understand where they are coming from: " This effectively inverts the

Exchanged call signs with W1LY, then he disappeared. Worked N2CQR in VA. Heard WA3O and N8DAH. I'm still on! -- John - WA2FZW

Well it looked like a promising night but yet again the grow lights around the corner strike again..... qso: W1LY WA3O KA9OOI ? Heard N2CQR N6ORS WI1B ? Hope the FCC helps me out with the RFI but we

I got mine to work with a DPDT switch.? I have the whole thing powered by a 3-cell li-po battery at 12.6V max, 11.1V nominal. I found that there was a common ground on the input and output of the

By the way if the volume control is set to the minimum end you will not get anything.? Also if you inject your 0db signal it will be shorted out at minimum setting. Try setting about half way when

This is absolutely INCORRECT. pinMode(xx, INPUT) and pinMode(xx, INPUT_PULLUP) only enable/disable the internal pull up resistors. They DON'T invert the behaviour of the input! 73 Allard PE1NWL

Or even better: //configure the PTT SENSE to use the internal pull-up pinMode(PTT_SENSE, INPUT_PULLUP); // check if PTT sense line is installed PTTsense_installed = !digitalRead(PTT_SENSE);

Unplug the vol control from the board and see if touching the pin that would connect to the wiper gives you noise. That isolates the preamp from the circuit. If you get the noise you used to get, look

Jerry, now I think of it- I have a much better idea: at startup, initially enable the pullup at A0 and check if the PTTsense is installed. Then disable the pullup, like so: //configure the PTT SENSE

Here's what they say in the Arduino docs about the pullups: ----------------------------------------------------------------------- On the digital pins: There are 20K pullup resistors built into the

No schematic Karl, but it's quite simple. A regulated 12 V supply for the BitX and prior to the regulator is the feed to the PA. Because of how I have it set up, when I turn it off I turn off power to

I think it is the "inline" reference that is causing the confusion. Bill, VK7MX

Thanks Jerry. I didn't know it was possible to track it once it left India. I'm a long way from a small rural post office but the one in my neighborhood isn't usually too busy these days. I'll ask

Farhan, thanks for replying, thanks for your patience. ? Here are the responses to your thoughts: audio preamp might be busted. *Uh-Oh! ?Q16? * the LM386 seems to be working (from the test that you

Yes I had this problem too sometimes, it was caused by RF due to poor SWR. Make sure your SWR is OK and that everything is grounded properly. Perhaps your cheap paddle (its cable) is not shielded or

Some do take longer than others to arrive: ? ??/g/BITX20/message/22442 This tidbit from the first post in that thread might be informative: "I had an email exchange with hfsignals

Jerry, Correct, we need the pullup on A0 for reasons of backward compatibility. At startup the firmware detects whether or not the PTTsense line is installed. When the PTTsense is NOT installed, input

Hi Jack, I'm still waiting for my BitX kit (I fear it may have gone missing) but I have all the parts for the VFO and will start construction using the new manual. I would like to vote for split mode