| ??? 02/15/08 10:58 Read: times |
#150859 - Suitable method for implementing capsense |
Hi all,
I am using capacitor sensing technique for sensing user key press. NE556 was connected in Astable mode and the capsense act as a capacitor in that. Hence the change in output frequency is monitored by a controller for detecting user key press. But with this method, i couldnt get a consistant result! i.e., for each key the frequency during key press varies. also, if i place a 2mm thick glass sheet over capsense, i couldnt get a better frequency variation.. Hence it would be great if i could get some ideas on how it could be achieved. Suresh. |
| Topic | Author | Date |
| Suitable method for implementing capsense | 01/01/70 00:00 | |
| Use a chip ! | 01/01/70 00:00 | |
| Other chips | 01/01/70 00:00 | |
| Yes, we explicitely beg your pardon, Erik, Richard | 01/01/70 00:00 | |
| Technical Details on Capacitive sensing | 01/01/70 00:00 | |
| most un reliable - is this a commercial product | 01/01/70 00:00 | |
| for commercial product only.. | 01/01/70 00:00 | |
| why its considered unreliable | 01/01/70 00:00 | |
| high/low for before/during touch | 01/01/70 00:00 | |
| What do you mean? | 01/01/70 00:00 | |
| Yes i am going through.. | 01/01/70 00:00 | |
| LM567 | 01/01/70 00:00 | |
| LM567?? | 01/01/70 00:00 | |
| and.. | 01/01/70 00:00 | |
| Post back your result | 01/01/70 00:00 | |
| getting the same problem + my concept | 01/01/70 00:00 | |
| Another one - SiLabs | 01/01/70 00:00 | |
Freescale capactive touch/proximity | 01/01/70 00:00 |