Oops OK now re: IRL530N mosfet with BS2
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Posts: 46,084
Hi all,
Got the mosfet to work, must have burned it out, there wasn't any smoke,
fire or anything else out of the ordinary.
Guess these mosfets are a little more fragile than transistors.
Anyway, I put in a new one and am back up to speed.
Happy Stamper
Original Message
From: techno masai <plunkettm@e...>
To: basicstamps@yahoogroups.com <basicstamps@yahoogroups.com>
Date: Saturday, February 24, 2001 2:26 PM
Subject: [noparse][[/noparse]basicstamps] IRL530N mosfet with BS2
:Hi All,
:
:Sitting here wondering why I can't get this logic level IRL530N mosfet to
:work with my BS2.
:
:Trying to control a small relay, I know this can be done with a transistor
:but just wanted to see how these mosfets worked too.
:
:Anyway I have the Gate pin 1 on the IRL530 hooked up to P0 on the BS2, got
:the Drain pin 2 going to the relay, got the source pin 3 hooked up to
:ground.
:
:The program on the BS2 flashed an LED no problem but when I hook it up to
:the Gate nothing happens. I took the LED out to in case it was fouling
:things up. I also reversed the drain and source connections too to see if
:that would make it work, this last try just made the relay stay on.
:
:Anyone got any hints??
:
:TIA,
:
:Mark
:
:
:
:
:Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
:
:
:
Got the mosfet to work, must have burned it out, there wasn't any smoke,
fire or anything else out of the ordinary.
Guess these mosfets are a little more fragile than transistors.
Anyway, I put in a new one and am back up to speed.
Happy Stamper
Original Message
From: techno masai <plunkettm@e...>
To: basicstamps@yahoogroups.com <basicstamps@yahoogroups.com>
Date: Saturday, February 24, 2001 2:26 PM
Subject: [noparse][[/noparse]basicstamps] IRL530N mosfet with BS2
:Hi All,
:
:Sitting here wondering why I can't get this logic level IRL530N mosfet to
:work with my BS2.
:
:Trying to control a small relay, I know this can be done with a transistor
:but just wanted to see how these mosfets worked too.
:
:Anyway I have the Gate pin 1 on the IRL530 hooked up to P0 on the BS2, got
:the Drain pin 2 going to the relay, got the source pin 3 hooked up to
:ground.
:
:The program on the BS2 flashed an LED no problem but when I hook it up to
:the Gate nothing happens. I took the LED out to in case it was fouling
:things up. I also reversed the drain and source connections too to see if
:that would make it work, this last try just made the relay stay on.
:
:Anyone got any hints??
:
:TIA,
:
:Mark
:
:
:
:
:Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
:
:
:
Comments
Just read your 2nd message. FETs are more rugged than bipolar transistors,
*EXCEPT* for the gate. It is easily damaged by ESD, so ground yourself
before handling a FET. Once it's in circuit, you're safe.
Ray McArthur
Original Message
From: techno masai <plunkettm@e...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, February 25, 2001 12:51 AM
Subject: Re: [noparse][[/noparse]basicstamps] Oops OK now re: IRL530N mosfet with BS2
> Hi all,
>
> Got the mosfet to work, must have burned it out, there wasn't any smoke,
> fire or anything else out of the ordinary.
>
> Guess these mosfets are a little more fragile than transistors.
>
> Anyway, I put in a new one and am back up to speed.
>
> Happy Stamper
>
>
Original Message
> From: techno masai <plunkettm@e...>
> To: basicstamps@yahoogroups.com <basicstamps@yahoogroups.com>
> Date: Saturday, February 24, 2001 2:26 PM
> Subject: [noparse][[/noparse]basicstamps] IRL530N mosfet with BS2
>
>
> :Hi All,
> :
> :Sitting here wondering why I can't get this logic level IRL530N mosfet to
> :work with my BS2.
> :
> :Trying to control a small relay, I know this can be done with a
transistor
> :but just wanted to see how these mosfets worked too.
> :
> :Anyway I have the Gate pin 1 on the IRL530 hooked up to P0 on the BS2,
got
> :the Drain pin 2 going to the relay, got the source pin 3 hooked up to
> :ground.
> :
> :The program on the BS2 flashed an LED no problem but when I hook it up to
> :the Gate nothing happens. I took the LED out to in case it was fouling
> :things up. I also reversed the drain and source connections too to see if
> :that would make it work, this last try just made the relay stay on.
> :
> :Anyone got any hints??
> :
> :TIA,
> :
> :Mark
> :
> :
> :
> :
> :Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
> :
> :
> :
>
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
I had dug out your original post on this matter back on 8/22, that was an
interesting one.
Now I'm trying to run the '530 from an OMRON photo interrupter, you know
break the beam and the relay turns off.
Trouble is now the '530 won't go off.
I put a 150k pot in series with a 100 ohm on the emitter side to try to
crank down the beam a little, but '530 still won't turn off relay.
The 150k pot maxed out makes the OMRON give out a 3.5v signal, but then when
I break the beam the signal goes back up to 5v?!?!?
Strange about the ESD, its raining here now, somehow I always thought ESD
was mainly a concern in dry weather.
Good to here from you again Ray.
Seen those new MCP3201 one channel 12 bit serial ADC's? Little over 4 bucks
each. Seems like a real winner for the BS2.
Thanks,
Mark
Original Message
From: Ray McArthur <rjmca@u...>
To: basicstamps@yahoogroups.com <basicstamps@yahoogroups.com>
Date: Saturday, February 24, 2001 10:17 PM
Subject: Re: [noparse][[/noparse]basicstamps] Oops OK now re: IRL530N mosfet with BS2
:Hi again, Mark,
:
:Just read your 2nd message. FETs are more rugged than bipolar transistors,
:*EXCEPT* for the gate. It is easily damaged by ESD, so ground yourself
:before handling a FET. Once it's in circuit, you're safe.
:
:Ray McArthur
:
:
Original Message
:From: techno masai <plunkettm@e...>
:To: <basicstamps@yahoogroups.com>
:Sent: Sunday, February 25, 2001 12:51 AM
:Subject: Re: [noparse][[/noparse]basicstamps] Oops OK now re: IRL530N mosfet with BS2
:
:
:> Hi all,
:>
:> Got the mosfet to work, must have burned it out, there wasn't any smoke,
:> fire or anything else out of the ordinary.
:>
:> Guess these mosfets are a little more fragile than transistors.
:>
:> Anyway, I put in a new one and am back up to speed.
:>
:> Happy Stamper
:>
:>
Original Message
:> From: techno masai <plunkettm@e...>
:> To: basicstamps@yahoogroups.com <basicstamps@yahoogroups.com>
:> Date: Saturday, February 24, 2001 2:26 PM
:> Subject: [noparse][[/noparse]basicstamps] IRL530N mosfet with BS2
:>
:>
:> :Hi All,
:> :
:> :Sitting here wondering why I can't get this logic level IRL530N mosfet
to
:> :work with my BS2.
:> :
:> :Trying to control a small relay, I know this can be done with a
:transistor
:> :but just wanted to see how these mosfets worked too.
:> :
:> :Anyway I have the Gate pin 1 on the IRL530 hooked up to P0 on the BS2,
:got
:> :the Drain pin 2 going to the relay, got the source pin 3 hooked up to
:> :ground.
:> :
:> :The program on the BS2 flashed an LED no problem but when I hook it up
to
:> :the Gate nothing happens. I took the LED out to in case it was fouling
:> :things up. I also reversed the drain and source connections too to see
if
:> :that would make it work, this last try just made the relay stay on.
:> :
:> :Anyone got any hints??
:> :
:> :TIA,
:> :
:> :Mark
:> :
:> :
:> :
:> :
:> :Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
:> :
:> :
:> :
:>
:>
:>
:>
:> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
:>
:>
:
:
:
:
:Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
:
:
:
> Trouble is now the '530 won't go off.
>
> I put a 150k pot in series with a 100 ohm on the emitter side to try to
> crank down the beam a little, but '530 still won't turn off relay.
>
> The 150k pot maxed out makes the OMRON give out a 3.5v signal, but then
when
> I break the beam the signal goes back up to 5v?!?!?
>
*** I am not familiar with the OMRON or your circuit, but the '530 should
turn off if the Stamp pin goes low.
> Strange about the ESD, its raining here now, somehow I always thought ESD
> was mainly a concern in dry weather.
>
*** That's true, rainy weather helps stop ESD, but humidity could still be
low if the furnace is blasting, or you have a chair like mine with covering
material that charges big time when I get up.
>
> Seen those new MCP3201 one channel 12 bit serial ADC's? Little over 4
bucks
> each. Seems like a real winner for the BS2.
*** Thanks for the tip ... we will check out that part. Right now I am
using the LTC1298, needing one channel only, which costs $9 from Digikey.
Ray McArthur