| ??? 02/24/06 11:48 Read: times |
#110665 - Sch Responding to: ???'s previous message |
Hi all,
I tried uploading my Sch, but I cannot see the link on the users pages window, but maybe try the link below. also plz let me know if you can see my page in the users pages window of this site. www.8052.com/users/sun/Zener-resistor.jpg I understand why I should use the cap instead of the resistor to ground. But, just to clear up how I plan to use this network........... I am basically using this network as a level shifter, i.e. to drop a signal from 15V to 4.7V. That is why I am not using the 7805. My 15V input to the network is supplied via an open collector output of an inductive switch. When the switch is on, the transistor switches on supplying 15V to the network. I have now settled on using just a voltage devider to drop the voltage, and protection is provided by a 6.2V zener in the place of the 4.7V zener. this should clamp any inputs higher than 6.2V to 6.2V. I thank you all for your time. |
| Topic | Author | Date |
| Zener Turn-on-time | 01/01/70 00:00 | |
| Remedy | 01/01/70 00:00 | |
| Thank You Kai | 01/01/70 00:00 | |
| Divider | 01/01/70 00:00 | |
| Resistor values | 01/01/70 00:00 | |
| Read again my calculation example | 01/01/70 00:00 | |
| drop that stupid resistor to ground | 01/01/70 00:00 | |
| can you draw the schematic? | 01/01/70 00:00 | |
| Assistance required to post Sch | 01/01/70 00:00 | |
| If using "Windows" | 01/01/70 00:00 | |
| Typo Oops | 01/01/70 00:00 | |
| Using a cap is enough | 01/01/70 00:00 | |
| actually for the "typical" use it is not | 01/01/70 00:00 | |
| Less than 1nsec | 01/01/70 00:00 | |
| Resistor instead of the cap | 01/01/70 00:00 | |
| Sch | 01/01/70 00:00 | |
| ALWAYS design to worst case. | 01/01/70 00:00 | |
| Homepage | 01/01/70 00:00 | |
| why is that 1k still there | 01/01/70 00:00 | |
| Aha! | 01/01/70 00:00 | |
Thank you all for your help. | 01/01/70 00:00 |