Retro Tech & Electronics | Antique Car Stereo Bluetooth Audio Retrofit with ESP32 - Part 1 of 4 @retrotechandelectronics | Uploaded March 2022 | Updated October 2024, 19 hours ago.
I'd picked up another Sapphire 9 radio, this time its only a repair, not a restoration, left in the original patina, and it seems in good condition. I was however asked if an auto-switching Bluetooth module could be designed for such a unit. Not one with a switch but automatic like a modern radio. This took some thinking.
Id decided to go with an ESP32 as a platform for this using a PCM5102 DAC as a compliment. I'd quickly found 2 areas for possible install, but first a design would need to be established.
A library from Phil Schatzmann exists in the community to provide an easy interface between the bluetooth and the DAC. A proof of concept is up and running quickly, I try it out on the Dynaco ST-70 and its working good.
Id chosen the voltage regulator as the voltage can be specifically selected, but their implementation was crap, and it was difficult to work with, I suffered through a few of them before cutting of the pot before figuring out the trace cut.
A power budget is then taken, i find it way below budget so I'm not concerned.
When more parts arrive well continue in chapter 2.
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
I'd picked up another Sapphire 9 radio, this time its only a repair, not a restoration, left in the original patina, and it seems in good condition. I was however asked if an auto-switching Bluetooth module could be designed for such a unit. Not one with a switch but automatic like a modern radio. This took some thinking.
Id decided to go with an ESP32 as a platform for this using a PCM5102 DAC as a compliment. I'd quickly found 2 areas for possible install, but first a design would need to be established.
A library from Phil Schatzmann exists in the community to provide an easy interface between the bluetooth and the DAC. A proof of concept is up and running quickly, I try it out on the Dynaco ST-70 and its working good.
Id chosen the voltage regulator as the voltage can be specifically selected, but their implementation was crap, and it was difficult to work with, I suffered through a few of them before cutting of the pot before figuring out the trace cut.
A power budget is then taken, i find it way below budget so I'm not concerned.
When more parts arrive well continue in chapter 2.
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
