EEVblog Electronics Community Forum
A Free & Open Forum For Electronics Enthusiasts & Professionals
Welcome,
Guest
. Please
login
or
register
.
Did you miss your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
This topic
This board
Entire forum
Google
Bing
Home
Help
Search
About us
Links
Login
Register
EEVblog Electronics Community Forum
»
Electronics
»
Beginners
»
Floppy disk drive STEP signal driving a LED
« previous
next »
Print
Search
Pages: [
1
]
Go Down
Author
Topic: Floppy disk drive STEP signal driving a LED (Read 474 times)
0 Members and 1 Guest are viewing this topic.
caius
Regular Contributor
Posts: 176
Country:
Floppy disk drive STEP signal driving a LED
«
on:
December 17, 2022, 11:55:53 pm »
Hi all,
I'm trying to drive a LED by the STEP signal (active LOW) of a floppy drive but LED lit briefly when single pulse occur.Do I need to a stretching circuit, perhaps?Can you advice me some solution?Thanks in advance.
Logged
retiredfeline
Frequent Contributor
Posts: 572
Country:
Re: Floppy disk drive STEP signal driving a LED
«
Reply #1 on:
December 18, 2022, 02:08:08 am »
Yeah you need a monostable. Lots of designs around of which fer shure they'll be a 555 one.
Logged
Stray Electron
Super Contributor
Posts: 2217
Re: Floppy disk drive STEP signal driving a LED
«
Reply #2 on:
December 18, 2022, 02:52:14 am »
All you need is a simply Logic Probe circuit. There should be plenty of circuit designs available online.
Logged
caius
Regular Contributor
Posts: 176
Country:
Re: Floppy disk drive STEP signal driving a LED
«
Reply #3 on:
December 18, 2022, 11:17:15 am »
Thanks for replies.
The STEP pulse is around 7us as measured by a logic analyzer :
I have in mind the attached designs (without 555 for now), which could be the more appropriate? (RC value must be adapted obviously)
Logged
Print
Search
Pages: [
1
]
Go Up
« previous
next »
Share me
Smf
EEVblog Electronics Community Forum
»
Electronics
»
Beginners
»
Floppy disk drive STEP signal driving a LED
There was an error while thanking
Thanking...
EEVblog Main Site
EEVblog on Youtube
EEVblog on Twitter
EEVblog on Facebook
EEVblog on Odysee