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Thanks that's the picture i'd been looking for. Together with the recommendation to use buffered output for the VFO this clarifies wireup a lot. Thank you very much for the great work Jack

Sounds like a hosed nano. I'm assuming you have the CH340 driver installed in your computer? Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

I have 12v in and 5v out like I would expect to have. I pulled the board off of the display and connected it to my laptop. The radrino shows up as USB-Serial CH340 (COM10) when I plug it into my

Assuming your DDS is the type that has three rows of seven pins be sure that the jumper at J3 is in place. Also, not that there is an easy fix, but you might check to be sure it’s an AD9850 and not

Jack Thanks. Question: External power on picture states 7-9 volts. I have been using 12 volts. I assume my assumption is wrong and that a voltage regulator is needed to reduce 12v to 7-9 v for the

In the "wire up" section of HFsigs.com, under "alignment of the bitx40" it says to turn RV1 (PA bias) fully clockwise (off) and with an ammeter in the PA power lead (so you are measuring only the

Grab your voltmeters guys. Check the input and output voltages of the 3 term regulator hanging off the side. Also try unplugging the connectors going in and plugging the Raduino in to your PC. Vince.

All: Thought this might help some of you decipher some of the pins coming out from the board. Jack, W8TEE #yiv2517355600 -- filtered {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2

exact same here....and as I tuned the display cut off and on. Going to order another board.

Mine was working fine for a week, receiving fine also. ?I was trying to adjust the two post to see if maybe turning them to the left would make a difference in the TX output. ?In the past I had only

error found !!!!! headphone connected to LM386 pin 5 and there is audio ...... looking in diagram it must be C111 there have to be changed

that's where I am right now... no display.

Have any of you guys seen this where the display shows black boxes all the way across the top line of the display?

My bad...and stupid. If you changed the symbolic constants up near line 121 and 122, then use the following at lines 1415-1418 ? ? ? ? ? if (flag == -1) { ? ? ? ? ? ? ? ? ? // Too low?

If you have a scope, connect it to OUT2 on the board. You should see a sine wave. Jack, W8TEE To: [email protected] Sent: Friday, July 14, 2017 3:12 PM Subject: Re: [BITX20] W8TEE TFT/ VFO DISPLAY

I expect speaker is ok, have tested it with a 1,5V batt. and it gives a " blob"? everything have worked until I made a complete rewiring and connected parts for CW ! I do not use connectors instead I

hmm... I had a blocking Display at 7200 too when I change the bandend to 7200 because I have forgotten to change Line 1417. :-D The default is 7030 if no?EEPROM recorded before. You maybe check the

All: I just uploaded a table that shows the pin assignments for my MEGA2560 Pro Mini TFT/VFO PCB versus Allard's Nano pin assignments as of his release 1.18 for the Raduino. Look for a file that

Hi Jack I am using a KY040 connected to the correct pins…I get the feeling I have an issue with the DDS because if I remove it, the code behaves in the same way without it. Unfortunately I do not