| ??? 12/04/07 01:16 Modified: 12/04/07 01:24 Read: times |
#147824 - Exactly! Responding to: ???'s previous message |
Erik said:
Fooling around with "one PNP transistor and a base resistor or a diode" in a reset circuit will, most likely make it worthless since the tresholds would get higher. The dedicated supervisor circuits start off holding reset waaaay earlier than you can achieve with homebrew solutions. Adding stuff like transistors, diodes or even CMOS gates to a reset chip is always dangerous. It's very likely that the thingy will fail afterwards. Reset chips (supervisory chips) are precision components and don't need any "enhancement". If the chip you have doesn't fit (because of wrong polarity, threshold or else), take another one that does, but don't tinker with it. Kai |
| Topic | Author | Date |
| Is this a problem with some reset supervisors? | 01/01/70 00:00 | |
| Precisely! | 01/01/70 00:00 | |
| Wrong direction | 01/01/70 00:00 | |
| most of the time... | 01/01/70 00:00 | |
| I will test the series resistor solution | 01/01/70 00:00 | |
| this does not make any sense | 01/01/70 00:00 | |
| "push-pull" output, MCP101 | 01/01/70 00:00 | |
| sorry, have not done that one for a while | 01/01/70 00:00 | |
| NO, it is NOT | 01/01/70 00:00 | |
| Exactly! | 01/01/70 00:00 | |
| first part is wrong, second is right. | 01/01/70 00:00 | |
| 8051 related reset stuff with external components | 01/01/70 00:00 | |
| How to use a rest chip properly | 01/01/70 00:00 | |
| Advantages | 01/01/70 00:00 | |
| Not so fast, there, Pilgrim ... | 01/01/70 00:00 | |
| I have given up to convince you | 01/01/70 00:00 | |
It's not just you, Kai ... | 01/01/70 00:00 |