Readme.txt for 03HK08.ZIP

03HK08.ZIP contains files pertaining to "A PIC Programmer for all Computers," by Ralph Gable, WA2PUX (QST, Aug 2003, pp 61-62). At the time this was posted, the author's e-mail was wa2pux@arrl.net.

The files you have downloaded are an etching pattern, parts placement diagram and an additional figure showing the author's application circuit with provisions for programming a PIC resident in the circuit. 

While hand wiring this project is quite acceptable, I wanted to make a printed circuit board . . . and so I did. In figure 3 is the bottom copper as seen from the top of the board. This lends itself very well to using the toner transfer paper method of making the board. The board is 2.7-inches by 4.2-inches. The centers of the mounting holes are at 2.3 x 3.8-inch (0.2-inches in from the edge of the board). Yes, I could have made the board a lot smaller, but I wanted it easy to build, remember? So, I made wide tracks and lots of room between tracks and the copper ground plane. Part of the reason for the large copper ground plane lies in the desire to save my etchant: the less copper you dissolve away, the more boards you can etch. Figure 4 is the top "silk screen" of the board, for component location.

The author points out that the emitter and collector leads of Q1 are transposed in August QST. The emitter should be grounded and the collector connected to U1, pin 12.


73, Bob, KU7G
2:07 PM 07/15/2003
Rev'd 9:24 AM 07/16/2003

Robert J. Schetgen, KU7G/1				Senior Assistant Technical Editor			
American Radio Relay League, 225 Main St, Newington, CT 06111-1494
ph: 860-594-0277 (direct)					fax: 860-594-0259	
e-mail: rschetgen@arrl.org  

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