| ??? 05/21/05 08:22 Read: times |
#93677 - Improvements Responding to: ???'s previous message |
Thanks for keeping me on track Mr. Neil. I do however think I should address the solder joints to start with. Some of the connections are small (60 mils). I will develop another board with larger pads and clean the protective coating, instead of relying on the rosin core solder to eat through it and perform a good bond on a small area.
Also Kai had mentioned; "These built-in Pierce oscillators ARE prooven and good. They are designed to work very reliable, when, yes when using the burden caps recommended in datasheet. Problems never occured to me with these built-in oscillators. But keep your hands off cheap crystals! They are a mess as they can show abnorme dampings (too high equivalent series resistances). Problems can also occur, when using an overtone quartz or when just using a too high frequency for the micro." I accepted this as good advice as well because I am using a crystal, and at $1.50cdn it is probably a pretty cheap crystal as well. Regards James Krushlucki |
| Topic | Author | Date |
| Temperature and 89C2051 | 01/01/70 00:00 | |
| Chip Grade? | 01/01/70 00:00 | |
| A bit vague | 01/01/70 00:00 | |
| oscillator? | 01/01/70 00:00 | |
| Built-in Pierce oscillators ARE reliable | 01/01/70 00:00 | |
| Freeze spray | 01/01/70 00:00 | |
| Overheated parts, too hot soldering? | 01/01/70 00:00 | |
| I have my doubts | 01/01/70 00:00 | |
| What about this? | 01/01/70 00:00 | |
| has happened | 01/01/70 00:00 | |
| Re: has happened | 01/01/70 00:00 | |
| Microwave oven | 01/01/70 00:00 | |
| not microwave, but toaster oven | 01/01/70 00:00 | |
| Thanks for replies | 01/01/70 00:00 | |
| How about this | 01/01/70 00:00 | |
| Wait a minute... | 01/01/70 00:00 | |
| Improvements | 01/01/70 00:00 | |
| resist | 01/01/70 00:00 | |
| Quartzes, etch resist | 01/01/70 00:00 | |
| Quartz Crystals | 01/01/70 00:00 | |
| Quartz crystals | 01/01/70 00:00 | |
no problem | 01/01/70 00:00 | |
| Maybe! | 01/01/70 00:00 | |
| Maybe! | 01/01/70 00:00 | |
| LED temperature rating? | 01/01/70 00:00 |