If anybody need to use BT Serial module in your car,
without "base board"
here is a short guide
Ebay gives this modules based on BK3231S chip
(with 5 pins)
![http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5426.JPG](./download/file.php?id=7496&sid=6ce3e998136663d8e4117492f27a3f00)
- http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5426.JPG
- DSCN5426.JPG (302.94 KiB) Viewed 5828 times
We need to remove one R0 rezistor
![http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5445.JPG](./download/file.php?id=7501&sid=6ce3e998136663d8e4117492f27a3f00)
- http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5445.JPG
- DSCN5445.JPG (278.28 KiB) Viewed 5828 times
![http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5434.JPG](./download/file.php?id=7497&sid=6ce3e998136663d8e4117492f27a3f00)
- http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5434.JPG
- DSCN5434.JPG (321.73 KiB) Viewed 5828 times
Solder 1uF cap SMD 0402
![http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5436.JPG](./download/file.php?id=7498&sid=6ce3e998136663d8e4117492f27a3f00)
- http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5436.JPG
- DSCN5436.JPG (293.55 KiB) Viewed 5828 times
Then solder any kind of LDO stabilizer in SOT23. (AP2210N-3.3TRG1 or MCP1754ST-3302E/CB or XC6206 3.3V)
![http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5439.JPG](./download/file.php?id=7499&sid=6ce3e998136663d8e4117492f27a3f00)
- http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5439.JPG
- DSCN5439.JPG (303.17 KiB) Viewed 5828 times
...repeat it
![Mr. Green :mrgreen:](./images/smilies/icon_mrgreen.gif)
...
![http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5441.JPG](./download/file.php?id=7500&sid=6ce3e998136663d8e4117492f27a3f00)
- http://195.28.90.62/dohc/ostatne/SPP-C_BK3231_12V-HACK/DSCN5441.JPG
- DSCN5441.JPG (291.01 KiB) Viewed 5828 times
...and that's all FOLKS ......
Stabilizer MCP1754ST-3302E can handle 16V input ... ideal for automotive use ...