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My WP-34S : USB to Serial cable prototype
04-13-2014, 09:40 AM
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walter b Offline
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RE: My WP-34S : USB to Serial cable prototype (updated on 12-April)
(04-13-2014 08:46 AM)Marcus von Cube Wrote:  So I removed the electronic guts in the blob and just left the switches connected. They connect directly to the pins in the calculator without any electronics involved. Sometimes things are simpler than anticipated...

The FTDI cable is connected inside the blob to the RX, TX and GND pins on the calculator end. The power supply is connected to GND and VBatt, all inside the blob.

Sometimes a circuit diagram tells a thousand words, doesn't it?

d;-)
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RE: My WP-34S : USB to Serial cable prototype (updated on 12-April) - walter b - 04-13-2014 09:40 AM



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