| ??? 09/09/07 07:57 Read: times |
#144168 - Digital outputs - running light |
I have a question concerning digital outputs.
I use a 74HCT574 D-type flipflop, as a buffer between my controller and some leds. When i make a running light it works perfectly when i hold the clock signal (from 574) trough a wire in my hand. When i connected to ground or positive the runnng light stops. The data specifications of the 574 say the clock should be an positive raising edge. Does any of you guys know how to simulate this raising edge or what i should do to make it work. (The reason for the buffer, is that in a next stadium, i will be adding a shift register to it , so with only a few signals i will be able to control several outputs and inputs.) |
| Topic | Author | Date |
| Digital outputs - running light | 01/01/70 00:00 | |
| don't you have a spare output? | 01/01/70 00:00 | |
| He needs more direction than that! | 01/01/70 00:00 | |
| use HCT573, clock tied to VCC | 01/01/70 00:00 | |
| WHAT??? | 01/01/70 00:00 | |
| 50/60Hz pickup?? | 01/01/70 00:00 | |
The first answer was enough ,thanks | 01/01/70 00:00 |