I need help with transistors

[Briskability]

I am building an electronic lock and i have to use a BS170 transistor, but i can not find one. I want to know if there are any substitutes for this piece. The schmatics for the lock are at the following sight **broken link removed**

Hope you can help. Thanks,
Brisk

 

[Phasor]

You could try a 2N7000. Failing that, almost any small n-channel mosfet should work fine, but just check the datasheets first, to compare specs.

 

[Briskability]

I have a NTE490 N-Channel MOSFET transistor, would it fit my needs?

 

[Mosfet]

I have a NTE490 N-Channel MOSFET transistor, would it fit my needs?

yes

 

[bogdanfirst]

hm...are you building that lock with the 4022 ?
i build it and it works......but still didn't have time to make the keyboard and really use the lock for something usefull.....
tell me how your project is going.

 

[Briskability]

I also was wandering just what it means when an output "goes high"?
Thanks for the help

 

[Phasor]

In digital electronics, everything is represented by "high" and "low" values. They are comparable to binary "1" and "0". Typically (but not necessarily) 'high' values are represented by a 5V signal, and 'low' values are represented by a 0V signal.

 

[Briskability]

If the output goes high when the correct code is entered then why does the led i added to the output stay lit all of the time, did i maybe skrew up?