Re: Comparator for sensor
- From: John Fields <jfields@xxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 31 Jan 2006 12:49:06 -0600
On Tue, 31 Jan 2006 10:20:28 -0500, Manimozhi Baskaran
<baskaran@xxxxxxxxxxxxxxxxxx> wrote:
>Hi,
>
>I am building an application that needs to beep when the voltage output
>from the sensor device is less than 0.8 Volts. I am not sure what would
>be the right design that I can use for the buzzer to beep. The voltage
>for the sensor is 5 V DC supply. Should I consider using 741/LM series?
---
No. Consider using a real comparator, like John Popelish suggested.
However, an LM393 may not be able to give you enough output current
to run your beeper, so if you could post what its voltage and
current requirements are we can suggest an appropriate means of
driving it. Also, if you could tell us what you're using for a
sensor we'll be able to suggest how to set up a proper "front end"
and provide any hysteresis the circuit may require.
--
John Fields
Professional Circuit Designer
.
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