Retro Tech & Electronics | Antique Car Stereo Bluetooth Audio Retrofit with ESP32 - Part 2 of 4 @retrotechandelectronics | Uploaded April 2022 | Updated October 2024, 20 hours ago.
With the parts needed to continue we can now move on with the repair of the radio itself, as well as a cleaning and service of the unit, however, a restoration is not authorized.
With the radio repaired and tested a good point for power pickup is determined. It will be switched power so that the ESP32 and associated components turns on and off with the radio. In the mean time i've been soaking the ground lug which was completely rusted, eventually it broke off. I dropped a new bolt of the same size right in.
The 5 volt regulator was connected into the switched power of the radio and tested good. We can use the radio as a power source going forward.
The mux is then designed into the circuit so that the AM and Bluetooth signals can auto switch into the radios pre-amp input. The mux switching is controlled by the ESP32.
To make things more interesting, Ive digitized my voice into the esp32 when the Bluetooth connects and disconnects. After testing out the voice an analysis is done to determine the best point to inject the signals back into the radio. Schematic point 13 is determined.
Wiring in both AM and Bluetooth into the mux and the output to point 13 allows for a full running auto switching system working as designed.
The next chapter will deal with fitting all of this into the unit.
HiLetgo PCM5102 I2S IIS Lossless Digital Audio DAC Decoder Module Stereo DAC Digital-to-Analog Converter
amzn.to/3Fw5cWT
2.4G WiFi Antenna for FPV TX Antenna with RP-SMA Female Cable Dipole Whip
amzn.to/3FvAhtI
ELEGOO 32 Pcs Double Sided PCB Board Prototype Kit
amzn.to/3yMXN1C
5v Regulator, DROK 5pcs Mini Voltage Reducer DC 4.5-24V 12V 24V Step Down to 5V Buck Converter
amzn.to/3YW9Ww7
74HC4051 744051 5-V, 8:1, 1-Channel Analog multiplexer
amzn.to/3JLjDJ9
Copper Foil Tape (2inch X 33 FT) with Conductive Adhesive
amzn.to/40aprkY
Phil's Library ESP32-A2DP
github.com/pschatzmann/ESP32-A2DP
Attribution: Music by bensound.com
#ESP32 #VOLKSWAGEN #ARDUINO
With the parts needed to continue we can now move on with the repair of the radio itself, as well as a cleaning and service of the unit, however, a restoration is not authorized.
With the radio repaired and tested a good point for power pickup is determined. It will be switched power so that the ESP32 and associated components turns on and off with the radio. In the mean time i've been soaking the ground lug which was completely rusted, eventually it broke off. I dropped a new bolt of the same size right in.
The 5 volt regulator was connected into the switched power of the radio and tested good. We can use the radio as a power source going forward.
The mux is then designed into the circuit so that the AM and Bluetooth signals can auto switch into the radios pre-amp input. The mux switching is controlled by the ESP32.
To make things more interesting, Ive digitized my voice into the esp32 when the Bluetooth connects and disconnects. After testing out the voice an analysis is done to determine the best point to inject the signals back into the radio. Schematic point 13 is determined.
Wiring in both AM and Bluetooth into the mux and the output to point 13 allows for a full running auto switching system working as designed.
The next chapter will deal with fitting all of this into the unit.
HiLetgo PCM5102 I2S IIS Lossless Digital Audio DAC Decoder Module Stereo DAC Digital-to-Analog Converter
amzn.to/3Fw5cWT
2.4G WiFi Antenna for FPV TX Antenna with RP-SMA Female Cable Dipole Whip
amzn.to/3FvAhtI
ELEGOO 32 Pcs Double Sided PCB Board Prototype Kit
amzn.to/3yMXN1C
5v Regulator, DROK 5pcs Mini Voltage Reducer DC 4.5-24V 12V 24V Step Down to 5V Buck Converter
amzn.to/3YW9Ww7
74HC4051 744051 5-V, 8:1, 1-Channel Analog multiplexer
amzn.to/3JLjDJ9
Copper Foil Tape (2inch X 33 FT) with Conductive Adhesive
amzn.to/40aprkY
Phil's Library ESP32-A2DP
github.com/pschatzmann/ESP32-A2DP
Attribution: Music by bensound.com
#ESP32 #VOLKSWAGEN #ARDUINO
