AVR ISP programmer In-System Programmer

Programmer in my `AVR software and technical Library - April 2003` CD-rom and decide to publish it. The reason was, that this programmer is very stable and works perfect with AVR Studio 4. I hadtested it before published it, with AT90s2313 and its worked fine! To work this programmer you must to connect acrystal 4MHz to slave device at theXTAL1 and XTAL2pins, or if you have an device with
AVR ISP programmer In-System Programmer - schematic

internal oscillator (AT90S2343, ATmega161 etc) and its enabled, its not need any external oscillator. If you want you canuse MAX232 or MAX202 instead transistors, capacitors and resistors to connect master AT90S1200 with Personal Computer (PC). There is no problem (i check this hardware by using MAX202).

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