| ??? 12/10/07 00:33 Read: times |
#148018 - Practise and Theory Responding to: ???'s previous message |
Andy Neil said:
Actually, it's a high current that's required for activation, followed by a much lower "holding" current (yes, that does still read power in the end!) So You still have the coil resistance and You can measure voltage across it. If we would have some miraculous superconductive solenoid coil then we could speak only about the current but as the reality is - we have a resistive coil and there is always some voltage across it - the bigger the voltage - the bigger the current. Yes. You have it absolutely right. but in reality You measure the voltage across the solenoid. Then You calculate the current if You ever need that information (You need). So IMHO we were both right about this. |
| 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 |