these guys actually SELL circuitry that is proven not to work (OK, I have heard that this occasionally works with certain PCs)

http://www.sparkfun.com/commerce/...cts_id=133

click on the schematic.

I stumbled over this in another forum where a sucker had actually paid money for it.

We have seen a lot of 'working' designs offered for free, but selling it takes the cake.

The ultimate irony is that had they made a fully fiunctional circuit (with a MAX232[equivalent]) it would have cost them no or little more.

Erik

I've got the CFAX graphic LCD carrier board (SKU#: LCD-00463) and it's got issues.

The schematic is dated 5/27/2007, but the PCB I have (I received it last month) is noted as V2 and is dated 10/31/2006 (and that matches the pinout).

The schematic has a net called VCC_BL at the node where the positive terminal of C5 meets the inductor. That net doesn't connect to anything else, and page 3 of the HV826 datasheet (http://www.supertex.com/pdf/datasheets/HV826.pdf) indicates that this node should be connected to the input supply. Someone at Spark Fun might want to test these things before shipping them ...

Also: the schematic shows three boxes labeled SL1, SL2 and SL3 but nothing on the board matches these things.

Also also: you paid for the top-layer silkscreen, so why not put reference designators near the components? And maybe include in the silkscreen the net names for the line of microcontroller connections?

Also also: the touchscreen connections are listed as TS1 through TS4. How about calling them X+, X-, Y+ and Y-? And which is which, anyways?

Finally: bringing out the LCD's CS1B and CS2 lines to the unused breakout holes between D4 and D5, and D6 and D7, is useful.