Hello,
I build relay switch for parallel port and it works with Z-ParSwitch as I hope to.
Problem is if PC shuts down then relays get power for moment then turns off
Win7/32 boot and all data pins D0...D7 switch on
Even after deinstall Z-ParSwitch thats happen.
Is in WIN7 Ultimate possibility not give 5v to parallel port data pin D0...D7 when booting up?
Please help
That's likely normal, its initializing the port and looking for a connected device. The only way I know to "maybe" stop it would be to disable the port in the BIOS. That's likely not the answer you are looking for.
Thanks alphanumeric,
I am disappointed because no reaction at all after disable LPT port.
Perhaps I can use USB to LPT adapter in this case?
Maybe, if your software can control it like a regular parallel port. USB will loose power to if the PC shuts down and the +5V will be there as soon as you turn it on. What exactly is it your trying to do?
I trying control electrical devices such as lamps,amplifer on and off.
I use circuit.
And softwaresaved like in screen.
But after reboot is all outputs switched on and stay on..
I hope all outputs wake up as I saved or all ouputs is turned off not all ON.
One output control portable USB HDD over 5v power vire and I do not want click it on and off ewery time pc reboot.
Win7 turn all outputs ON after start because it happen without any lpt control software installed.
I wonder how ignore behavior like that.
Maybe is some patch or software or lpt settings for lpt port ignore turn all data ON after WIN7 start.
Maybe rebuild circuit.
OK, I see what you're doing, but I don't have an answer for you at the moment. Did you build the circuit or buy it pre made?
Thanks concern alphanumeric,
I build the circuit by myself and it works flawlessly.
Only problem is I described above.
Z-Manufacture answer is:
"Z-ParSwitch is a pure command line program with ui, it does not save any settings.
With startup Windows resets all ports. There are circuit boards wich are able save last settings and ignore the port reset".
I tray find out what kind circuit is the best (not expensive) or is possibility cheat on Windows 7.
You'll have to latch the last state imputed. You'll have to look at the outputs on the parallel port and see if there is a clock pulse or write pulse that goes out when a bit is changed, (new word written to the port). Then use that to latch the data into your circuit. You'll have to redo your circuit so you can latch your data in. Even then though, if that clock pulse gets sent on boot up you'll be in the same predicament you're in now. You'll have to do a lot of testing and bread boarding to get it working the way you want. I had my old laser printer on my parallel port and it would come out of sleep mode every time my PC was started up or rebooted. Windows looks for hardware while booting up so if that port is enabled its going to be initialized.
Yes,you`re right.
This circuit is last check box in my ``to do` list.
I build inside pc case five channel HI-FI amplifier for movies and stereo HI-FI amplifier for music and more.
I never give up never surrender...:)
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