01-26-2011
USB Circuit Question
My problem is I need to control a 7 segment LED circuit (currently on a breadboard, eventually on a PCB). The only option I have from my PC is through USB. The circuit I have built on a breadboard uses 7 segment LED's and 4206 decade counters. I have cut a USB cable in half, and am using the positive and negative leads to power the circuit. I have made multiple attemps at controlling the circuit through the D+ and D- leads, but have failed so far. Basically all I need to do is control the clock input to the 4206 decade counter.
I have made multiple attemps at controlling the circuit through the D+ and D- leads, but have failed so far.
Does anybody know if this is even possible using the D+ and D- leads from the USB? I will eventually attempt to control it through bash script, but don't want to waste my time trying to develop a driver for this circuit if I will not be able to control it.
University of Alabama
Kenneth Ricks
ECE 494 - Capstone Design II (URL's not allowed due to my post count)
7 More Discussions You Might Find Interesting
1. Cybersecurity
it's true that USB port has no security?? (0 Replies)
Discussion started by: lolo_vang
0 Replies
2. UNIX for Dummies Questions & Answers
Hi everybody,
When I plug a USB key to my debian, where can I access the files?
I don't have any user interface, what commands do I have to run to find the files in my USB key?
Thanks for your help.
Santiago (6 Replies)
Discussion started by: chebarbudo
6 Replies
3. UNIX for Advanced & Expert Users
Receiving the above error from an application. I narrowed it down to a problem with rsh. If the rsh command is issued too rapidly it fails intermittently.
Try this script on your linux box...
#!/bin/sh -f
for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
do
echo $i
rsh... (1 Reply)
Discussion started by: kevinl33
1 Replies
4. UNIX for Dummies Questions & Answers
Is there an easy way to setup a cross-over cable (USB-USB) between a linux box and a windows PC? My 2 machines are next to each other but I really do not want to keep transfering my files using my USB drive.
Thanks! (4 Replies)
Discussion started by: Xterra
4 Replies
5. Shell Programming and Scripting
Hello everyone,
just wondering if this type of if condition will execute properly.
Suppose I have a script with two functions in it called abc and def:
is this code valid, or is there a better way to short circuit the if statement?
#! /bin/ksh93
abc(){
statement 1 using $1
statement 2... (4 Replies)
Discussion started by: gio001
4 Replies
6. UNIX and Linux Applications
Hi all.
In some articles I have read about a "UNIX Circuit Design System", which was written originally in some version of
Research UNIX by Sandy Fraser.
Here is a quote from the article "A Research UNIX Reader: Annotated Excerpts from the Programmer's Manual", by Douglas McIlroy:
Even... (1 Reply)
Discussion started by: mghis
1 Replies
7. Answers to Frequently Asked Questions
Hi. i am new to Linux. i have a Turbo-cad and circuit wizard programme on CD that I want to install and run. I keep getting the message I do not have an auto-run programme. Do I need to install specific drivers for this? What programme do I need? (1 Reply)
Discussion started by: Alfred Kruger
1 Replies
LEARN ABOUT DEBIAN
mailping-success
2004-04-16
mailping
0.0.4
MAILPING-SUCCESS(1) Mailping MAILPING-SUCCESS(1)
NAME
mailping-success - Munin plugin to graph time since last mail delivery
SYNOPSIS
/usr/share/mailping/munin-plugins/mailping-success {[config] | ['']}
DESCRIPTION
mailping-success is a Munin plugin that monitors time passed since last successful email probe.
Configuration output
When passed config, it outputs Munin configuration information. If there are no circuits defined (no subdirectories in /etc/mailping), it
specifies that Munin should draw no graph either.
If configuration files /etc/mailping/circuit/warntime and /etc/mailping/circuit/failtime exist, the values in them are passed on to Munin,
for use in Nagios alert integration.
Value output
When passed an empty string '', mailping-success outputs the difference between current time and last successful probe, for each configured
circuit.
FILES
/etc/mailping/
List of circuits that exist; each subdirectory is a circuit.
/etc/mailping/circuit/warntime
If more than this many seconds have passed since last successful probe, a Nagios warning is triggered by Munin (assuming it has been
configured to do that). Default: no warnings.
/etc/mailping/circuit/failtime
If more than this many seconds have passed since last successful probe, a Nagios alert is triggered by Munin (assuming it has been
configured to do that). Default: no alerts.
/var/lib/mailping/state/circuit/success
Timestamp in seconds of the last successful probe for circuit.
ENVIRONMENT
MAILPING_CONFIGDIR
Override the location of the configuration directory. Default: /etc/mailping
MAILPING_STATEDIR
Override the location of the state directory. Circuit states are stored in the state subdirectory of this directory, in subdirectories
named after the circuit name. Default: /var/lib/mailping
SEE ALSO
mailping-latency(1), mailping-cron(1), mailping-store(1), munin-run(8), munin-node(8)
AUTHOR
Tommi Virtanen <tv@havoc.fi>
Havoc Consulting
Author.
COPYRIGHT
Copyright (C) 2004 Havoc Consulting
mailping 0. 2004-04-16 MAILPING-SUCCESS(1)