Interconnect
This page details the BoSL Interconnect. A small board which allows use of 5V sensors with the 3V3 BoSL board, it was designed specifically for the BoSL velocity sensor.
BoSL Interconnect PCB
Use
To use the interconnect with the BoSL Velocity probe:
On the first use the two jumpers near JP3 need to be soldered closed.
The left hand side is the interface to the BoSL board,
Connect VPP, to VPP on the BoSL (~4.2 V) Connect GND, RST, RX, and TX as per normal for a BoSL velocity sensor. Leave WKE disconnected Connect EN to D6 or the relevant pin.
EN controls the if the boost converter is working, if EN is high then the boost converter is enabled and is generating the 5V for the velocity probe.
The right hand side is the interface to the velocity probe,
Connect 5V, GND, RST, RX, TX to the respective pins on the velocity probe Leave WKE disconnected
Once wired up (and some possible code adjustments for the EN pin are made) the interconnect should start working. The velocity sensor can now be used as if it were connected directely to the BoSL board.
rev 0.2 changelog
The following changes were implemented in the rev 0.2 version of the BoSL Velocity Interconnect: BoSL Velocity Interconnect 0.2.0.
- Replaced costly screw terminals with 0.1" sockets
- Removed 3V3 input, 3V3 to be generated from 5V line (reduces cables required)
- Added MIC94090 load switch for bringing the 5V line to a high impedance state when EN low (reduces quiescent current consumption substantially)
- Smaller profile 21 mm * 22 mm.
The current velocity interconnects are still usable with the aforementioned power consumption caveats to be aware of.
