Die Anfrage
“An ESP32 SDR receiver breadboard with an antenna header, 50 ohm resistor, two relay modules and two 10 uF capacitors: use D25 and D26 for relays and D34 and D35 for the capacitor signals.”
Dann probieren SieAdd a status LED on D2Move the first relay control to D27
Was diese Zeichnung zeigt
Die dahinterstehenden Entscheidungen verstehen.
01
Use two relay modules (module relay) to individually sample I and Q channels from the antenna signal.
02
Store sampled voltages in electrolytic capacitors, then read with ESP32's ADC (pins D34, D35).
03
Control relay timing via ESP32 GPIOs (D25, D26) to implement 90-degree phase offset for quadrature sampling.
Suitable for educational demonstrations of SDR sampling concepts using off-the-shelf components, without specialized RF integrated circuits.