| ??? 03/21/05 02:54 Modified: 03/21/05 03:01 Read: times |
#90068 - Schematic Responding to: ???'s previous message |
James said:
I will look into this further, not exactly sure how to amplify a small signal like the one I am working with. Maybe you can try the following circuit?  This circuit is a Schmitt trigger providing hysteresis, built arround CMOS inverters of CD4011. Adjusting is done by connecting input to ground (0V) and very slowly (think about time constant formed by 22k and 4ยต7!) turning the trimpot, up to the moment, when the output changes it's state. Please use shielded cable for the connection to sensor. Good luck, Kai |
| Topic | Author | Date |
| Hall Effect Sensor | 01/01/70 00:00 | |
| Subject Circuit | 01/01/70 00:00 | |
| why tap into the ignition interface? | 01/01/70 00:00 | |
| Spare Spark | 01/01/70 00:00 | |
| divide by two? | 01/01/70 00:00 | |
| Wasted Spark | 01/01/70 00:00 | |
| Spare/wasted | 01/01/70 00:00 | |
| nomenclature | 01/01/70 00:00 | |
| Hall Effect? | 01/01/70 00:00 | |
IR | 01/01/70 00:00 | |
| NOT Halleffect | 01/01/70 00:00 | |
| Sniffing spark | 01/01/70 00:00 | |
| Hall Effect Sensor Help | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| Schematic | 01/01/70 00:00 | |
| Decreasing 1M resistance | 01/01/70 00:00 | |
| Different approach | 01/01/70 00:00 | |
| 18Vpp or 18Vp? | 01/01/70 00:00 | |
| Correcting of typing error | 01/01/70 00:00 | |
| Re: Typing error | 01/01/70 00:00 | |
| Some comments | 01/01/70 00:00 |