| ??? 07/14/05 08:09 Read: times |
#97328 - Driving solenoids Responding to: ???'s previous message |
Can i use H11B1 to drive relay above digram show that H11B1 drive a solenoid value 12 v.Above circuit switching relay 250 per minute.Any comments please. There is no solenoid in the circuit you mentioned. The opto is driving a mechanical relay which in turn controls a lamp. Small relays draw just a few mA of current and optocouplers can happily drive them direct. But as you mentioned your solenoid is 12V/1A, so it is obvious that you can't drive it directly with optocoupler. You need some suitable driver to drive solenoid and a mechanical relay can't be used for this purpose since you need 250/min switching speed. If you use a relay, be ready for a continouous "krr...krrr....krrr" sound and too often replacements. For a DC solenoid to be used at 250 times/min, you need to use either a power BJT or MOSFET which is driven (and isolated) by optocoupler. Remember: The surge current drawn by the coil of solenoid may go many times high the normal coil rating. |
| Topic | Author | Date |
| Optocoupler as relay | 01/01/70 00:00 | |
| Solid State Relay (SSR) | 01/01/70 00:00 | |
| look at this | 01/01/70 00:00 | |
| Which solenoid? | 01/01/70 00:00 | |
| 4N33 | 01/01/70 00:00 | |
| 12VDC 1 amp | 01/01/70 00:00 | |
| Why not Relays? | 01/01/70 00:00 | |
| solenoid switching 250 per minute | 01/01/70 00:00 | |
| I'm designing a similar one | 01/01/70 00:00 | |
| why not a -14, a 555 as scmitt trigger d | 01/01/70 00:00 | |
| 12V operation | 01/01/70 00:00 | |
| H11B1 and relay | 01/01/70 00:00 | |
| Image ?????? | 01/01/70 00:00 | |
| H11B1 and relay | 01/01/70 00:00 | |
| depends upon the relay ratings | 01/01/70 00:00 | |
| Driving solenoids | 01/01/70 00:00 | |
Driving solenoids | 01/01/70 00:00 | |
| Datasheet! | 01/01/70 00:00 | |
| it's all in the name | 01/01/70 00:00 | |
| Read This | 01/01/70 00:00 |