| ??? 12/09/07 22:48 Read: times |
#148013 - Oh-Oh-Use-Mcu Responding to: ???'s previous message |
Although the task is seemingly simple there are still a dozen things that can go wrong with the static logic design.
A MCU approach has an inbuilt capability to be able to be fixed without soldering iron in case of some design flaws. With software You can: - replace any debounce filtering - adjust the needed delays - create a more sophisticated solenoid drive Further more. The solenoids I have met require a high voltage activation pulse and have a MUCH lower hold voltage (read power). Actually if You keep on teasing the solenoids with their activation voltage You might as well use them as cigarrette lighters after a while. Solenoid activation is nothing simple. I would not try to do it with PLA:s or similar. It is ofcourse doable but the MCU is a lot simpler approach. |
| Topic | Author | Date |
| Looking for a one of six selector chip | 01/01/70 00:00 | |
| HMM | 01/01/70 00:00 | |
| sounds like you need a PAL | 01/01/70 00:00 | |
| have you looked at 74HC237 with a 1 Hz clock? | 01/01/70 00:00 | |
| Oh-Oh-Use-Mcu | 01/01/70 00:00 | |
| Driving is easy. | 01/01/70 00:00 | |
| It is dead easy but ... | 01/01/70 00:00 | |
| Current, not voltage | 01/01/70 00:00 | |
| Practise and Theory | 01/01/70 00:00 | |
| I decided to settle for the MCU | 01/01/70 00:00 | |
| Memory relays and reset problems | 01/01/70 00:00 | |
| So ... you\'re using a latching relay? | 01/01/70 00:00 | |
| Example of a solenoid driver | 01/01/70 00:00 | |
| chip driver | 01/01/70 00:00 | |
| Yes, that's the kind of thing | 01/01/70 00:00 | |
| No, voltage, not current! | 01/01/70 00:00 | |
| AC solenoids | 01/01/70 00:00 | |
| Thread morphing... | 01/01/70 00:00 | |
PLC | 01/01/70 00:00 | |
| trivial, maybe, but why not use a 'trivial' uC | 01/01/70 00:00 | |
| Trivial microcontrollers | 01/01/70 00:00 |