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Weird, I assumed that truncation was a yahoo thing.

And weirder still, when I search for "hfsignals" on the groups.io webpage, the message summaries show the entire entire email address without truncation.

Anyways, the email address is ? hfsignals at gmail dot com

Hopefully that will sneak by the truncation demon.

Jerry, KE7ER

I don't see how switching the display from 16x2 to 20x4 isn't trivial.? If using the normal hd44780 interface they are wired the same (and if you're ordering a BITX you should be able to handle the wiring).? Change the lcd.begin(16, 2); to lcd.begin(20, 4); and Bob's your Uncle,

Those extra two lines could have the battery monitor or other minor tweaks that shouldn't tax the Nano too much.

Switching to a more powerful Arduino would be a little more effort, but not really complicated.? Again though, rather than modify the Raduino, I'd order a Si5351 board to go with the new display and Arduino (I have one coming) and leave the original Raduino unmolested.

I'm seeing a trunicated email for the order email address "hfsignals@..."? What's the last part?? Is there a setting to turn this trunicating off?

I ran across this and thought other Arduino players may find it useful.

The Arduinos have EEPROM memory for non-volatile storage, but it's slow to write to and can actually wear out if written to over and over.

To combat this Arduino programmers sometimes use real time clock modules to store frequently used variables as they contain a small amount of accessible battery backed up SRAM.? This combats the slow write and wear out problems, but eventually the batteries die (which may or may not be an issue since it will happen infrequently and will probably be easy to recover from with a battery change).

A new type of memory is available though, it's called FRAM, it has a much faster write speed than EEPROM, is non-volatile like EEPROM, and has a much higher longevity before wearing out.

There are some boards available on eBay, such as this one:

And if you look around on the net you can find some Arduino libraries for it.

It may come in useful for sketches that do a lot of reptitive writes that need to be kept track of between shut downs (like keeping track of a rotary encoder tally).

73,

Steve, KA0NEB

Even at twice the cost...how much is that in dollars and cents??

Quite a bit for many of the target customers. ?HFsigs is counting pennies to assemble and ship a functional SSB transceiver at $59. ?

Fortunately it's easy to swap out the processor and display to something more capable if that's what you want. ?I'll likely wind up with a 32 bit ARM Cortex M4 Arduino compatible from PJRC, perhaps even with floating point in hw if I ever get through the Lyons DSP book. ?But I'd bet any code intended for wide distribution will have to fit in a nano with a 16x2 display for some time to come. ?

Jerry, KE7ER

Ooops, K3NG's project page is at:

I've done this before and it's significantly more than trivial.

Sure with "added extra circuitry" we could do lots of things but are there enough pins available for these functions? S-Meters would require a voltage reading on an analog pin - is one available? Looks to me like there _may_ be at least one. There are definately some spare digital pins (CW keyer anyone?) which could be used to replace the pot for a rotary encoder in tune freeing up more analog pins.

More input buttons (to select options etc?) could be added onto an analog input using a set of resistors. I dunno what that's called but you feed a series of switches with various resistor values from a 5V source and then measure the voltage. different voltages equate to different button presses.

All of these things would require chopping up the board to rewire some of the Nano's pins.

Perhaps some sort of computer control could be enacted over the USB serial port. Make the Radiuno speak Elecraft? Or perhaps computer CW keying for contests etc?

And then there's the code room. Other libraries may consume more room than we would like. Code certainly will.

Why are we using a 16x2 display instead of a 20x4?? The cost difference is trivial, and more display real estate is always desirable.

Ah thanks for the post, I thought I had a fault! ?Now I know I'll get used to it as it does make sense! ?

73 de Mike, G0JXX

I asked the same question. ?It looks like you can inject a signal into the mic input and then use an outboard CW filter on receive. ?It might be simple to build a 1kHz sine oscillator using a few discrete components, a few circuits on Facebook?

73 de Mike, G0JXX