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October 19, 2010
Tutorial - Beginning Embedded Electronics - 4 |
about 3 years ago
I can confirm that this capacitor layout simply does not work for the very common (pin-compatible) max232a subsitute, the sp232acn. Connecting pins 2 and 6 via a capacitor instead of to Vcc and Ground causes very unreliable operation at 38400bps, with about one out of ten characters getting through correctly.