nigelmercier
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I'm working on a project with a PIC to communicate with the Raymarine SeaTalk bus. The link below is the part of the schematic diagram of a Raymarine instrument. The logic chip is connected to the TX and RX connections on the right, and the SeaTalk signals and power enter top left.
Official SeaTalk Schematic
I want to simplify the right half of this circuit. I know it can be done with fewer components, as this Simple Circuit shows.
This simple circuit however was done without prior access the the official circuit above; I was hoping that having the original circuit would help in designing a better simple one. I've tried to follow what the original circuit does that the simple one doesn't, but I'm struggling.
Inversion doesn't matter, as I can chose how I bit-bang the bus. Baud rate is 4800, the SeaTalk bus is a 12V bus, the logic side is 5V in the original, but 3.3V in my device.
Any help with reducing the component count would be greatly appreciated.
Official SeaTalk Schematic
I want to simplify the right half of this circuit. I know it can be done with fewer components, as this Simple Circuit shows.
This simple circuit however was done without prior access the the official circuit above; I was hoping that having the original circuit would help in designing a better simple one. I've tried to follow what the original circuit does that the simple one doesn't, but I'm struggling.
Inversion doesn't matter, as I can chose how I bit-bang the bus. Baud rate is 4800, the SeaTalk bus is a 12V bus, the logic side is 5V in the original, but 3.3V in my device.
Any help with reducing the component count would be greatly appreciated.