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!

A lot of updates to the DG5 project

I finally had some time the past two weekends, and I made a lot of updates to the project – the code has been updated, I released code for the Nixie and LED versions, I finished off the LED version by mounting it in a chassis, I broke up the project into 3 separate pages for LCD, LED, and Nixie, and finally, I moved the code and PCB project files over to Github.  Whew!

The current version as of this writing is 2.0.2.  Updates will be directly published to the Github project page. Version 2.0.2 includes:

  • Stability Enhancement. Locks the values used for the HFO and BFO, updates then only if they have moved more than 500Hz and 100Hz, respectively.  This should help eliminate some wander/wiggle by keeping the two “fixed” frequencies stable.
  • Released the LED version, uses MAX 7219 based, 8 digit, 7-segment display.
  • Released the Nixie version, uses I2C SmartNixies.
  • Added correction factor (optional)
  • Added smoothing/averaging to reduce display jitter – averages over 4 readings (adjustable)
  • Code cleaned up and better documented
  • Changed frequency counter logic to the FreqCount Arduino library
  • Tested with latest Arduino IDE (1.8.2)

That’s all for now, click on the project pages to see more on the LED and Nixie versions. If you have a DG5 emulator running, give the new code a try!

Steve
KV6O