ESP32radio

A ESP32 based Radio. Take a look at my homepage for more details. https://www.mortara.org/allgemein/esp32-radio/

Components

The main components are :

• A Lolin S3 ESP32 as main controller
• A NE5532 base pre-amplifier module
• A 2 x 50W amplifier module to drive the main speakers
• A Si4735 for FM/AM reception
• A VS1053 to play internet radio streams
• A HD44780 LCD for clock and status information on the right side
• A MAX7219 8 x 32 LED matrix display for current station and frequency on the left
• A 8 channel magnet relais for input switching
• A 4 channel magnet relais for speaker switching
• 2 x PCF8574 io expander
• A DS3231 real time clock module
• A INA219 module to measure current power consumption
• A BMP180 temperature sensor to measure the temp on the pre-amplifiers bridge rectifiers
• A small fan to cool down the bridge rectifiers if they get too hot
• A 220V to 18V transformer as main power source
• Several LED, cables, switches etc

Wiring

ESP	Device	Lolin S3 Pin
1
2	Si4735 RST	47
3
4	VS1053 DREQ	15
5	VS1053 MP3_CS	16
6
7
8
9
10
11
12
13	Freq. display Data	8
14	Freq. display Clock	3
15	Freq. display CS	46
16	VS1053 XDCS	4
17	VS1053 SD_CS	5
18	VS1053 CLOCK	6
19	VS1053 MISO	7
20
21	I2C 1 SDA	42
22	I2C 1 SCL	41
23	VS1053 MOSI	18
24
25	DAC Signal meter	X
26	DAC Frequency meter	X
27	Speaker Relais	21
28
29
30
31
32	I2C 2 SCL	39
33	I2C 2 SDA	40
34	Rotary encoder cw	45
35	Rotary encoder ccw	48
36
37
38
39	Rotary encoder button	14
40