| ??? 02/27/08 05:04 Read: times |
#151510 - LM567?? Responding to: ???'s previous message |
Hi
I connected SE567 circuit as shown in the figure below and tested it. 
The input frequency at pin3 is from a schmitt trigger circuit(i used uA741 and used a capacitor at input instead of capsense plate) I use a trimpot at R1 to lock the input frequency to the center frequency so that i get a constant logic LOW output at pin8. But iam unable to achieve that. iam only getting a signal(at pin8) whose pulse width is getting modulated on varying R1. can i get some assistance on this to get the required output? 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 |