| ??? 11/15/04 15:07 Read: times |
#81186 - RE: pwr on/off a device with shared input Responding to: ???'s previous message |
a CMOS flip/flop and a few gates do not use much current and can be left on. So, make the uC detect that Play/stop is pressed for 2 secs (or whatever) and then flip the flop. Then make the button (gated with off) flop the flop. Let the flip-flop control a mosfet in series with the power. You will need to RC debounce the ON. In addition you will need a RC reset of the FF to handle power being disconnected and reconnected.
Erik |
| Topic | Author | Date |
| How to turn ON/OFF power!! | 01/01/70 00:00 | |
| RE: How to turn ON/OFF power!! | 01/01/70 00:00 | |
| pwr on/off a device with shared input | 01/01/70 00:00 | |
| RE: pwr on/off a device with shared input | 01/01/70 00:00 | |
| RE: pwr on/off a device with shared input | 01/01/70 00:00 | |
| RE: pwr on/off a device with shared input | 01/01/70 00:00 | |
| Schematic / Demo available below | 01/01/70 00:00 | |
| RE: Schematic / Demo available below | 01/01/70 00:00 | |
| Any comment on the about circuit? | 01/01/70 00:00 | |
| RE: Any comment on the about circuit? | 01/01/70 00:00 | |
| RE: Any comment on the about circuit? | 01/01/70 00:00 | |
| RE: How to turn ON/OFF power!! | 01/01/70 00:00 | |
| I agree with Charles | 01/01/70 00:00 | |
| simplest power on/off | 01/01/70 00:00 | |
| Another method | 01/01/70 00:00 | |
| it was an example | 01/01/70 00:00 | |
| it was an example | 01/01/70 00:00 | |
| Another power on/off technique | 01/01/70 00:00 | |
| Yet alternatively | 01/01/70 00:00 | |
My own method of this... | 01/01/70 00:00 |