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SunSDR2DX
Posted: Wed 10 Nov 10 2021 11:39 pm
by Daniel Wee
SunSDR2DX to SPE 1.3K-FA cable
In our cable the PC817 optocoupler is flipped upside down to get the pins in a matching orientation. The pins have been bent up. The SPE supposedly requires only a 2mA current rating so the PC817 should be okay (nominal 5mA). There is a 620-ohm resistor in series with the driver LED to drop the forward current to 20mA and forward voltage to 1.2V off a 13.8V drive level.
Re: SunSDR2DX
Posted: Thu 11 Nov 11 2021 1:03 am
by Daniel Wee
TCI to CAT (ICOM, Yaesu or Kenwood) bridge using ESP32
https://iw7dmh.jimdofree.com/sunsdr2-pr ... libraries/
Re: SunSDR2DX
Posted: Mon 22 Nov 22 2021 11:15 pm
by Daniel Wee
Re: SunSDR2DX
Posted: Thu 02 Dec 02 2021 1:37 am
by Daniel Wee
Okay yes!!!! The details for making the TCI bridge:-
1. Using the OLIMEX ESP32-PoE-ISO board
2. R37 needs to be removed from the board
3. The data input from the SPI to pin 36 of the board is clamped down with 1x LED and 2x 1N4148 types, all in series, giving a clamp of 1.7+0.6+0.6 = 2.9V roughly
4. After the clamp the signal is fed via a 1k resistor to pin 36
5. Output from pin 4 to SPE RXD is direct, no protection required
6. In the TCI serial initialization, you need to specify INVERT (true for the last parameter)
7. The remote activation will require a 12V-ish level but otherwise works
Re: SunSDR2DX
Posted: Fri 17 Dec 17 2021 11:55 am
by Daniel Wee
Code: Select all
GND Black
TX TTL Blue
RX TTL White
RLY Brown
ALC Green
Remote Red
SunSDR SPE Board ESP32
Brown Brown
Black GND
Black GND
White U1TXD (GPIO4)
Blue LED U1RXD (GPIO36)
ALC Green
GND GND (3)
Opto1 GPIO5
Red Opto4
Red Opto3 (1k)
Re: SunSDR2DX
Posted: Tue 28 Dec 28 2021 9:00 am
by Daniel Wee