{computer}: How to add a monostable to PC PWR/Reset button?

@FuZZ1L0G1C: If you are too cheap (or cannot afford) to build a new system as @davenn suggests, just write a little program that loads and executes last, after everything else is done. Said program beeps your computer's speaker, or bangs on an I/O port bit connected to sound a klaxon, or ring a loud bell, or sound an air-horn... whatever gets your attention. Surely your PC is old enough to still have a serial RS-232 port and/or a parallel printer (Centronix) port? Either one of these will have an output bit you can use.

 

Is OS Windows, Linux or rotten Apple? 6-7 minutes is too long. See if you can activate something that shows you on the screen what the computer is doing/loading. I think it is hanging on something.

 

Sounds like the AV program is set to scan during startup.I would switch that off and let the AV program scan sometime after boot up. If the computer stays on overnight then the wee hours of the night is a good time for it to do it's thing

 

Dave

Second using a small SSD as bootup disk. Works great. I also use Malware and AVG, happy with them.
But I'm not saying temp disable, I'm saying switch off the setting that says scan during bootup

 

You are correct about the power button. An "ATX" power supply has all of the main outputs plus a small internal "housekeeping" supply that always is on even when the system is off. It powers the circuit that watches the ON/Standby" switch/button and enables/disables the main supply when you push it.

You do not need to monitor the power button. If the timer circuit is just powered by any of the main supply outputs (+5 V, +12 V, whatever), it will start when the system comes up, time out after 5-7 minutes, and beep. If you use a self-oscillating piezo beeper instead of a speaker, this can be done with a single CMOS 555. However, I recommend using a counter circuit instead. A 5-6 minute timer takes a relatively large timing capacitor, and its accuracy will vary with room temperature and aging. A single-chip oscillator/counter like the CD4060 can deliver very long time delays with small capacitor values. Basically, for any given delay period the capacitor would be approx. 8000 times smaller than with a 555 circuit.

Schematics later, gotta run to the hospital.

ak

 

How long of a beep?
A single beep that trails off like the ding of a doorbell is pretty easy.
Single beep or on-off beeping for a period?

ak

 

Select a piezo beeper and post a link to its specs; not a bare piezo disc, but an complete beeper that runs on DC.

ak