I have a UBit
replacement Raduino, many of the group bought them.
It is much improved
and is a direct replacement.? It has 16 Additional I/O bits
using a Microchip
Expander.? Ada Fruit
library works fine.? The I2C Address is also settable with
jumpers.
It has 2 header
connector with the I/O bits and power and ground.
I call it RaduinUMax.?
Nano Plugs in, Power supply protection, Heat sink too.? LCD
exactly place as original.
Would be great for
adding more UBit functions.
Private email me for
more info......motdog@...
Mike, WA6ISP
On 9/11/2019 5:24 PM, Nat Goldberg
wrote:
This shd be interesting.?
On Sep 11, 2019, at 6:22 PM, John (vk2eta) <
vk2eta@...> wrote:
On Wed, Sep 11, 2019 at 09:01 AM, Razvan Fatu
wrote:
- supply voltage indication
- forward power
- reflected power
Hello Razvan,
I had the same objective of creating a portable rig. The
easiest and cheapest option I found was to add a second
Arduino (a Mini in my case but can be a Nano, the sketch is
the same). They communicate over the I2C bus with the 2nd
Arduino a slave on the bus.
The advantage is that you get a lot of extra pins but most
importantly a new lot of memory for per-processing the data
you collect as the memory gets full pretty quick on the
Raduino's Nano as you add features. The 2nd Nano can be set
to sleep most of the time, adding limited extra current.
I added a FWD/REV and SWR measurement, a battery voltage
indication on the display and a two level low battery alarm
(with TX inhibit on the 2nd low level), plus a few other
features that I thought were useful for a portable rig
(Output power control in SSB, ATU, Android/iPhone style
mic/headphone with PTT on/off via the call/hangup button,
etc..).
I still use the same display (has some advantages on power
consumption and readability in the sun) but I alternate the
display between not urgent data (like battery voltage and
Step Size+Key selection). On Tx I replace the second line by
real-time Forward power and SWR. See attached pictures (no
antenna handy, so no actual values, sorry).
This may give you some ideas:
For the SWR bridge I uses Don's (ND6T) design described
here:
It is sensitive enough to give you readings from about a
watt, so useful across the range. Not as precise as Farhan's
solution in the Antuino, but ok for my needs.
The latest drawings and sketches for both the main Arduino
and the 2nd one are in the file section at;
/g/BITX20/files/Variations%20on%20KD8CEC%20Software%20%28by%20VK2ETA%29%20+%20ATU%20sketch
They are highly configurable by enabling/disabling the
functions you want.
The post describing the functions:
/g/BITX20/topic/16657839#46254
and the latest version:
/g/BITX20/topic/17836001#46953
Please be mindful that these sketches are for V3-V4 boards.
For V5, the relay switching function and the 2nd IF
frequencies need to be changed.
Hope that helps.
All the best,
73, John (VK2ETA)
<IMG20190912080324.jpg><IMG20190912080232.jpg><IMG20190912080230.jpg>
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
