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Hi Jack, Yes, I2C is great!? I've used I2C many times before (and in fact have many I2C devices and backpacks on hand - when I was playing a lot I ordered most versions of the Arduino, LCD displays,

That sounds great Ken , look forward to seeing the results

Hi Joel: You're exactly right. Also, the I2C interface can be used with lots of different external devices that might be of interest, too. Jack W8TEE To: [email protected] Sent: Saturday, January 21,

Randy: Another source for people who have absolutely no programming background with the Arduino (or anything else), I might suggest...ahem...

Mike: You're right...every two minutes!! Jack, W8TEE To: [email protected] Sent: Saturday, January 21, 2017 11:48 AM Subject: Re: [BITX20] Alternative to using EEPROM for NV storage I took the strategy

Steve: One of the things I added to the Forty-9er VFO/LCD display was to write the current frequency to EEPROM so when you powered up, it would return to that frequency. As you pointed out, EEPROM has

Hi Jerry: I agree: Some Arduino libraries are horrible. Others I've seen contain some very, very good code. After a while, you get to know the wheat from the chaff by the author of the library. The

Hi To me, as a non-programmer guy, this is a huge step. Since I struggled a bit, I thought I would show how I got it working. I am using IDE version?1.6.12. BITX40 code from -

Jack, There are some very small adapter boards from China that convert 16X2 and 20X4 displays to I2C displays also. I have used them before and they are cheap, about $1 each. Just FYI if anybody

I took the strategy from the Forty-9er DDS VFO mod from QST a few months back - I don't save my 'state' until about two minutes after the last VFO change. Changing the VFO often actually prevents

Dave: How did you make/buy the bezel for your display? I'm having a hard time finding something. Jack, W8TEE To: [email protected] Sent: Saturday, January 21, 2017 5:07 AM Subject: Re: [BITX20] Why

Steve: If people are considering the 20x4 display, you might also consider the I2C version. Youduino.com sells them for $10 with the I2C interface. The advantage is that the interface only uses 2 I/O

I see, the 16x2 was purely a financial decision.? Well, it's meant to be a hackable device, and I think we have an easy one here! i'm still not seeing how this isn't a trival upgrade, and that extra

I've got a PJRC Teensy 3.2 on hand here now, would like to have it do stand-alone PSK31 at least. ?But would also like to see a build for the nano with support for cw, general coverage rx, and a

Nice!! Got some code to share? I especially like the large display. Not that it's 20x4 but that you chose a _large_ 20x4. None of us is getting any younger. To be able to see the radio without putting

I was going to suggest a Teensy. They come in the same footprint as the Nano and run at around 75MHz or so. Plenty of memory and LOTS of IO brought out to pads under board.

Sorry guys. My friend has been on the road so he hasn't been able to plot BPF's. Tomorrow we are getting together for a LTspice tute and plot BPF for 80 to 10. 73 Ken

Jerry Thanks for the suggestion of headers. Actually I did think of it but I didn't have any on hand at the time. I have removed all BPF components from the board. I made up an off board BPF for 40

My BiTX20 with 20x4 LCD. https://m.youtube.com/watch?v=VMs2Og8eddY

if you want to push into dsp, it is best to directly get to teensy. we chose the 16x2 because it was the most easily, universally available display. i expect a number of people to scracth build this