开云体育

I used the MAR-3SM+ part for the?antenna analyzer (AA)?project because it's easier to find. Right now, I'm using the same AA board for the display/VFO and it seems to be doing well taking the VFO output via RG174 to Farhan's input pins. That said, Farrukh is redesigning the board to bring almost all of the Arduino Mega 2560 Pro Mini pins out to header pins to make it easier to experiment with the BITX40 (I'm lazy...B40). You can see pictures of the AA board that supports the AD9850/Mega and the TFT display by looking at the assembly manual on QRPGuys.com (look for the Antenna Analyzer menu option). The beta for the new board is being tested and I would guess it will be three weeks before we have the "real" board done. I have the code done so that it will autosize to a 2.4", 2.8", 3.5" and 3.95" mcufriend.com TFT displays. That should give some case flexibility.?

Dennis Kidder (W6DQ and my co-author on the Arduino Projects book) is working on a CW and AGC options for the B40. I'm working on the code for a capacitive touch keyer (from the Projects book) which will do away with the need to drag a paddle with you. Setting CW speed and other menu options as well as tuning it done via a rotary encoder. The code provides for three CW messages to be tied to 3 NO switches on the top of the case. Each switch is tied to one of up to 50 canned messages (changeable at runtime). Press one of the switches and that message is sent via CW. The currently-selected message is displayed at the bottom of the display. It also monitors input voltage and has an S meter. (A repost of the display is below.) I don't know what we'll charge for the board, but it is a little bigger than the AA board to accommodate the different display sizes. All I can say at this point is that it will be less than $10.

Jack, W8TEE