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USB OP-AMP Buffer Driver
USB FTDI 240XS 8 BIT I/O, connected to 4 dual op amps as level shifters. TLV2372 Dual OP-amp 3-MHz Rail to Rail
Using FTDI's API calls it is easy to find the device (use FTDI_PROG to rename it) Then just send a value in HEX and the chip will drive the op-amps.
By jumping J4 left to center you can use the USB's 5 volts to power the rail to rail op-amps.
You can install a TO-92 regulator at U6 and power it from J5 or J3, and jump J4 from center to right, just not at the same time.
On the bottom of the PCB, I put 0603 footprints, if you need to change the outputs to a lower voltage than 3.3 volts.
USB OP-AMP Buffer Driver
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