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I too had intermittent receive. I used the very non-technical "tap" method. One of the tiny toroids had a problem either in the winding or the soldered connections. I tapped/wiggled it so that it

Put a switch on an I/O pin and use INPUT_PULLUP with pinMode(). When a NO pushbutton is pushed, the line is pulled LOW, which changes its state. Jack, W8TEE To: [email protected] Sent: Sunday, October

Vince I do have a scope. KG6PO

I had to yell to get through the noise but just managed to work W1LY with a very minimal exchange.

Yes that is what they're probably trying to say. But the wording is very confusing to programmers without an EE background. Many don't understand the real purpose of pull up resistors. 73 Allard

From p66 section 14.11.6 of the datasheet at: ?http://www.atmel.com/Images/Atmel-42735-8-bit-AVR-Microcontroller-ATmega328-328P_Datasheet.pdf (

Yes, I suspected that might be the case. I think I'll put bypass capacitors on both the keying lines and the function switch and spot switch. It probably doesn't help that I am using a plastic

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