voltage spike detector

[apoinso]

Is there a circuit out there (instead of an oscilloscope) that can detect higher than 28V voltage spike. This circuit should have an indicator (LED) that a greater than 26 Volts spike has been detected. I expect the spike to be 100 nanoseconds.
Thanks in advance.

 

[peterb]

Not sure whether this is what you're looking for, but it may help:

http://www.fluke.com/products/home.asp?SID=12&AGID=3&PID=5178

 

[nbucska]

Can you tell me more ? <nbucska@pcperipherals.com>

 

[apoinso]

thanks peterb!!!but I am looking for a cheaper alternative to oscilloscope (w/ trigger).
This circuit must detect a voltage spike greater than ...say 26volts and if it detects one, there should be a way of knowing it like a simple LED.
I tried to use a comparator but op-amps operate at not more than 10MHz response and what I know is that , spike ranges at 10-100 nanoseconds that is why we need high bandwidth scopes w/ trigger to detect one.

 

[nbucska]

What is the normal voltage on the line ? DC or AC ?
Is this one piece or for production (How much may it cost?)

Is it enough to indicate/store one event or do you need
more info ? What ? <nbucska@pcperipherals.com>

 

[apoinso]

Normal Voltage would be 26 VDC. This spike detector should indicate any event (eventhough spike occurs every second) by LED (or TTL output or latch circuit).

 

[nbucska]

If you latch it, it will indicate the first event only.

Are you speaking about a 28 V spice superimposed on 26V DC or only 2V ?

What do you want to do if there are more spikes ?
What about their amplitudes and durations ? <nbucska@pcperipherals.com>