| ??? 12/10/07 00:47 Read: times |
#148020 - Example of a solenoid driver Responding to: ???'s previous message |
This is a link to a project I once made to a amateur friend. It is a driver of an antenna tuner and it has 10 solenoids and 2 stepper motors to take over. It is controlled using a serial line interface.
Actually the stepper motors present a very identical problem with solenoids - they need higher voltage on higher frequency to run reliably (read to keep the current big enough). They also start getting hot if run slowly with the high voltage needed for the faster pace. The solenoids move about 10 mm and they swithcon/off very high voltages (hence the long movement). The steppers are used to run a roller coil (variable inductance) and a variable capacitance. I tried the capacitor+resistor solution here but this one would have needed a 10000uF capacitor to work properly. That would say to each solenoid. The steppers then - I did not even try. |
| 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 |