| ??? 12/16/05 11:52 Read: times |
#105345 - Power resistor selection Responding to: ???'s previous message |
Hello all ,
I need to connect 7805 to a 35VDC rectified o/p. For this I need to produce a voltage drop of 20 V before giving it to 7805. can any one suggest me suitable means to do it. I thought of connecting a power resistor in series to 35V and it is followed by a zener regulator of 15 volts which is given to 7805 i/p. Iam confused in selecting the rating of these components.can any one suggest me the required rating that must be used for these components to give a 15 V i/p to 7805. Thanking you, -suresh. |
| Topic | Author | Date |
| Add on card programming | 01/01/70 00:00 | |
| please clarify | 01/01/70 00:00 | |
| RE: please clarify | 01/01/70 00:00 | |
| (E)ISA addressing | 01/01/70 00:00 | |
| IOW and IOR | 01/01/70 00:00 | |
| not explicitly | 01/01/70 00:00 | |
| IRQ in EISA slot | 01/01/70 00:00 | |
| interrupt | 01/01/70 00:00 | |
| QBASIC programming | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| DIP Switch Address Setting in EISA card | 01/01/70 00:00 | |
| DIP switches... | 01/01/70 00:00 | |
| card design enclosed | 01/01/70 00:00 | |
| comparator | 01/01/70 00:00 | |
| QBASIC live and well. | 01/01/70 00:00 | |
| NT - not quite | 01/01/70 00:00 | |
| timing in Win? | 01/01/70 00:00 | |
| QBasic Lives!!! | 01/01/70 00:00 | |
| refer to 'Barry B Brey' | 01/01/70 00:00 | |
| EISA Bus interfacing | 01/01/70 00:00 | |
| beware if (E)ISA bus books | 01/01/70 00:00 | |
| Try this? | 01/01/70 00:00 | |
| Power resistor selection | 01/01/70 00:00 | |
| dont do it | 01/01/70 00:00 | |
| LM317 is an option | 01/01/70 00:00 | |
| Wasteful! | 01/01/70 00:00 | |
| if op can........... | 01/01/70 00:00 | |
| Power! | 01/01/70 00:00 | |
| basic Ohm's law | 01/01/70 00:00 | |
| Trouble shoot | 01/01/70 00:00 | |
| heating | 01/01/70 00:00 | |
| Reply : Heating | 01/01/70 00:00 | |
if you refer to D4 then | 01/01/70 00:00 |