Changes between Version 3 and Version 4 of CardReader
- Timestamp:
- 05/17/09 02:43:49 (15 years ago)
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CardReader
v3 v4 17 17 18 18 I would recommend using a support for the oscillator so that you can easily change it (I used a 3.58MHz one and a 6MHz one for testing). 19 19 20 I did include any LED or anything that was not absolutely needed. 21 20 22 JP1 allows you to select between 5V and 3.3V operation, this can be useful for cards that needs a 3V power supply instead of 5V. If you use 3.3V you will need to find an oscillator that runs at 3.3V 21 23