Daniel José Viana, danjovic@hotmail.com
I have designed a small single side PCB for the Easy Downloader V1.1. The board size is only 10.5 x 3.75 cm. It can make easily using toner transfer method. The component placement is shown below. Please notice that a DB9 connector can be soldered out of the board, so the PCB can be cut, the board size will be 9.2 x 3.75cm.
The prototype board with completed components.
The diode was placed on the copper layer.
Another feature is two extra holes to allow the use of a miniature crystal instead of the HC-49 type. See both crystals at the picture below.
Another feature is two extra holes to allow the use of a miniature crystal instead of the HC-49 type. See both crystals at the picture below.
I have made a bit modifications on the design of VPP switch and replace the MAX232 with two transistors as shown below..
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The Layout and schematic are available in several formats: Eagle Layout Editor and PNG.
Board and ComponentsMask, in Postscript format
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