RFFC2071 mixer

Thanks to Github @NightIsDark for the software part
https://github.com/NightIsDark/RFFC
basically does not need to be touched to use.
Use the silabs IDE to directly burn the hex provided by him. Pay attention to the crystal oscillator frequency.

The board size is five yuan for a double-layer board made according to the Raspberry Pi 0.
I tried my best to ensure the integrity of the bottom layer during the wiring... You can go in and take a look.
There is a ch340 on the board that converts the serial port to the c8051f330 c8051f330 to control rffc2071
3.3v. The ldo is mainly responsible for heating and light spraying
2.8 v The one with better parameters should be selected.
There are two LEDs. One is always on and the other flashes quickly is pll. If it is locked and flashes slowly, it is not locked.
In this version, the flashing LED is reversed. If you are like me and get bandaid in Jiali. If you come back, you have to change it yourself.
The component parameters have been selected and you can directly send Jiali Bandage patch.
There is no filter in the output part and it needs to be solved outside.

RFFC2071 is difficult to solder. In December 2019, you can buy a piece of four baluns for about 60 for about 30. You
must make sure to remove the oxide layer, otherwise you will not be able to solder at all.
tcxo buy it according to my schematic model number.

As for what this thing can do...
I tried it with rtlsdr, and I was able to kill the entire 433 segment by connecting a wifi wireless network card in the basement (x
Please abide by local laws and I will not be held responsible for being drunk.

===============================
The following is the software description copied   from https://github.com/NightIsDark/RFFC

UART: N-8-1 115200
CMD:
$GTF:# Get the current frequency
$STF:02500000000# Set the current frequency
ACK:
$ERROR1!# Command error
$ERROR2!# Parameter error, the entered frequency value is illegal. Legal range: 85M~2.7G
$STF:OK!# Frequency setting OK
Frequency parameters: The minimum unit for setting frequency is 10KHz, $STF:0805800011# The frequency set by the command is 805.8MHz, not 805.800011MHz.
Default frequency: 1862MHz
setting range : 0085000000 ~ 2700000000 Hz