Category Archives: Uncategorized

New DG5 Board design

I am working on an updated design to the DG5. Rather than being a shield for an Arduino, this PCB has the Atmel 328P chip on the board, along with room for a proper crystal, reset switch, and FTDI programming header. The main reason for doing this is the preferred Arduino to use – the Duemilanove – is getting pretty hard to find as this was a 2009 model. The later boards all use a ceramic resonator as the clock for the chip – which isn’t nearly accurate or stable enough in the role of a frequency counter.

The input side of the board is unchanged, the Arduino Shield headers have been removed and some rearranging of IC4 & IC5 to better allow the addition of the Atmel 328P (what is used on the Arduino’s) and the supporting hardware.

There is no USB port on this board. It would best to still have an Arduino to be able to load the software, as the bootloader comes on the chip when you buy an Arduino. If you have a chip programmer, you can do this without an Arduino. Once the chip has an Arduino bootloader, you can program via the FTDI header – a TTL interface that works with something like this from Adafruit:

https://www.adafruit.com/product/284

More to come, I just sent off for a set of prototype boards. There is no advantage upgrade if you already have the shield working – this is to address the lack of crystal controlled Arduinos moving forward if all goes well. This also means you’ll need to have a programmer or arduino anyway – and need one of these FTDI boards (above) that cost as much as an Arduino anyway.

Steve – KV6O

New run of DG5 emulator boards in stock

I received another run of 100 PCB’s for the DG5 emulator, project info here.  Please read before ordering – this isn’t a kit – you will need additional components.

INTERNATIONAL BUYERS PLEASE NOTE!  Please e-mail me at mycall@mycall.com (mycall is the website you’re on!) before placing an order.  On January 21, 2018, USPS stopped allowing USPS First Class Mail to contain goods, only documents.  Rates for goods are MUCH higher, unfortunately.  

https://about.usps.com/postal-bulletin/2017/pb22482/html/updt_006.htm




Steve
KV6O

New DG5 PCB batch ordered

UPDATE 10/17/19 – new boards have arrived, hopefully I can get the ordering process up and running this weekend.

I have ordered another 100 boards, which should be here in a few weeks. There still seems to be interest, so I’ll keep supplying the boards! I’ll post an update when they are ready to ship.

International shipping costs skyrocket!

I don’t know what the USPS is thinking, but I can no longer ship international for the $2.50 I have been charging.  The USPS rate for a document is about $2.50 (for 1 ounce), but for goods it varies – I tried to ship to Australia and it was over $13!  Bottom line, if you want me to ship internationally, please send me an e-mail first with you address – I’ll have to see if Paypal can do the calculations, but in the mean time please ask first at my call @ my call.com (same as the website you’re on!)

New boards in stock!

I received another run of 100 PCB’s for the DG5 emulator, project info here.  Please read before ordering – this isn’t a kit – you will need additional components.

Same price, $8.00 + $2.50 shipping for as many boards as you like. In most circumstances, I can ship internationally for this price as well. Rather than having to find the link to order on the project page (which has gotten rather large!) you can use the link below:





Steve
KV6O

Another 100 PCB’s ordered!

UPDATE 7/6/17 – The last 2 boards shipped today, so I am officially out of stock for now, but more are on their way.

I placed another order for 100 PCB’s with the same PCB house that made the last batch, should be here in a week or two.  In the meantime, I am selling the remaining few boards I have to folks who have written me wanting a board.  I *think* that means ~180 boards shipped so far, I’ll have to look at my previous orders.  I hope folks are having fun with the project!

New DG5 code!

It’s been a while since I have updated the code, and I have been working on some improvements on and off over the past year as I have had time.  This is for the LCD version, which I think just about everyone is running.  I have made an LED and Nixie tube version as well, but haven’t updated the code for these versions just yet – let me know if you need it. Done, new pages have been set up for both and new code for all 3 version is on Github

Some of the improvements:

  • New/improved frequency counter routine.  The program now uses the “FreqCount” library that is available in the IDE environment.  You will probably need to download this, which can be done selecting “Sketch/Include Library/Manage Libraries..” in the Arduino IDE.
    Search on “FreqCount” and you should find Paul Stoffregen’s library. Install the latest version.
  • Correction Factor added.  If needed, you can correct the display.  This will not “fix” a poor frequency reference/source like the ceramic resonators found on UNO’s.
  • Better code documentation.  I hope it’s easier to read and understand if you want to get in there and make your own modifications.
  • Added smoothing, anti-jitter code to help stabilize the display. (smooths over 10 readings, this is adjustable)
  • Tested with latest Arduino IDE (1.8.2)

4/8/17 – Code has been moved to Github, LCD, LED, and Nixie versions published.

4/8/17 – Version 2.0.2 uploaded to Github. Stability Enhancement added. Tests the HFO and BFO to see if they have moved more than 500Hz and 100Hz, respectively.  If not, keeps the last reading. This should help eliminate some wander/wiggle but keeping the two “fixed” frequencies stable.  Also lowered the averageing to 4 samples (from 10), makes display a little more responsive

New run of DG5 PCB’s on order as of 3/18/16

Update – boards have shipped as of today, 4/8/16. I should have them early next week and will probably build one to make sure they are good – I am using a different vendor for this run. I’ll let everyone who has posted inquiring about availability when I am ready to ship.

Due to the continued interest, I have ordered up another set of boards. I think as I finish up the LED and Nixie versions there might be more interest as well. The LED code is here, I haven’t released the Nixie code just yet but I will when I have the project complete. All three versions use the same PCB board – just different connections on the board.

More to come, but another run of boards is in the works!

Steve
KV6O