I2C Line Driver with remote LDO power supply.
Description
Ever had a I2C sensor a little further away? Then line drivers are your answer. This one is based around the PCA9600. You can also use it to connect 5V devices to a 3.3V controller. There is even an optional LDO to supply your remote sensor.
Attention: if you want to use this design as a line driver, you need two of the PCBs.
The PCA9600 is isolating the line voltage from the local voltage. So you can go with 12V VCC_LINE and use 3.3V VCC.
If you solder JP1 shut, then the VCC_LINE will be shorted to VCC.
Technical details/Needed components
U2: PCA9600
R3 & R4: 0805 SMD resistors. Use 330 Ohm for 3m telephone cable. Else, calculate according to PCA9600 datasheet.
Everything else is optional!
R1 & R2: Pullup for the local I2C
C2 & C3: Capacitors for SCA and SDL
To supply the remote sensor directly from the line voltage, solder JP1. If you want to supply the remote sensor over a LDO, then use:
U1: AMS1117
C1: 22u tantalum 1206
For example, I use a line voltage of 5V and a AMS1117-3.3 to supply a GY-63 and a SHT35 three meters away from the main cabinet with the ESP8266.
Build Instructions
Should be straight forward. For the PCA9600, it works best if you don't solder each pin individualy, but have some solder on your iron and much flux over the pins. Then go smoothliy over the pins and they will be soldered.
I2C Line Driver with remote LDO power supply.
*PCBWay community is a shared platform and we are not responsible for any design issues.
- Comments(0)
- Likes(0)
- 0 USER VOTES
- YOUR VOTE 0.00 0.00
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
More by Eduard Iten
-
Open Source Very Large Stick - Freejoy & MMjoy2 breakout board
351 0 0 -
RF Control training board for students based on ESP32 C3
469 0 2 -
Aquarius+ Computer, Standard PCB
666 0 3 -
KINETIC COASTERS with a TWIST! Laser or 3D Print some DIY Magic
484 0 1 -
RPI - 8 IO PLC With ATTiny85 Watch Dog
422 0 0 -
Nintendo Famicom HVC-001 Controller Shells
520 0 1 -
COMMODORE 128 DIAGNOSTIC REV.785260 KEYBOARD DONGLE
498 0 4 -
COMMODORE 128 15KHz DISPLAY ADAPTER (C128 80 COLUMN ADAPTER)
637 1 4 -