Greetings
From: "andy pugh"
>> A dozen or so shorted I/O lines is unlikely to cause FPGA damage (ask
>> me how I know)
>My 7i43 survived having _all_ the pins on one connector shorted to
>GND. It's distressingly easy to do if you crimp the ribbon cable a bit
>wrong.
Apologies if it is too obvio
On 20 April 2012 23:20, Peter C. Wallace wrote:
> A dozen or so shorted I/O lines is unlikely to cause FPGA damage (ask
> me how I know)
My 7i43 survived having _all_ the pins on one connector shorted to
GND. It's distressingly easy to do if you crimp the ribbon cable a bit
wrong.
--
atp
The
2012/4/22 gene heskett :
> On Saturday, April 21, 2012 05:16:18 PM Jon Elson did opine:
>>
>> Great. If it has the same part number, it SHOULD have the same pinout!
>> Any maker who does it differently should be shot. What a pain!
>>
> Yep, and I'll load the ammo.
>
>> Glad you got it figured out.
On Saturday, April 21, 2012 05:16:18 PM Jon Elson did opine:
> Viesturs Lؤپcis wrote:
> > I just resoldered the same transistor for the base-collector-emitter
> > pinout (collector in the middle, not base as I tried previously) and
> > tested and it works.
>
> Great. If it has the same part numbe
On Saturday, April 21, 2012 05:06:04 PM Jon Elson did opine:
> gene heskett wrote:
> > But then which of the
> >
> > other two are emitter and collector?
>
> This can usually be done with a DVM with diode test. Connect the
> meter between C and E, and then connect a resistor, like 22K Ohm
> be
gene heskett wrote:
> But then which of the
> other two are emitter and collector?
This can usually be done with a DVM with diode test. Connect the
meter between C and E, and then connect a resistor, like 22K Ohm
between base and the suspected collector. Note the meter reading.
If it is about 0
Viesturs Lācis wrote:
> I just resoldered the same transistor for the base-collector-emitter
> pinout (collector in the middle, not base as I tried previously) and
> tested and it works.
>
Great. If it has the same part number, it SHOULD have the same pinout!
Any maker who does it differently sh
On Saturday, April 21, 2012 10:02:54 AM Viesturs Lācis did opine:
> 2012/4/21 Kirk Wallace :
> > I'm just getting into the middle of this thread, but if I recall, the
> > last time we visited this circuit we found two sets of datasheets for
> > the same device with different pin outs. Maybe a mult
2012/4/21 Kirk Wallace :
>
> I'm just getting into the middle of this thread, but if I recall, the
> last time we visited this circuit we found two sets of datasheets for
> the same device with different pin outs. Maybe a multimeter could sort
> out the pins.
Kirk, You have good memory!
I just re
On Saturday, April 21, 2012 01:27:51 AM Kirk Wallace did opine:
> On Fri, 2012-04-20 at 21:24 -0400, gene heskett wrote:
> > On Friday, April 20, 2012 09:19:33 PM gene heskett did opine:
> > > On Friday, April 20, 2012 05:40:00 PM Dave Caroline did opine:
> > > > On Fri, Apr 20, 2012 at 10:18 PM,
On Fri, 2012-04-20 at 21:24 -0400, gene heskett wrote:
> On Friday, April 20, 2012 09:19:33 PM gene heskett did opine:
>
> > On Friday, April 20, 2012 05:40:00 PM Dave Caroline did opine:
> > > On Fri, Apr 20, 2012 at 10:18 PM, gene heskett
> wrote:
> > > > On Friday, April 20, 2012 05:18:06 PM
On Friday, April 20, 2012 09:19:33 PM gene heskett did opine:
> On Friday, April 20, 2012 05:40:00 PM Dave Caroline did opine:
> > On Fri, Apr 20, 2012 at 10:18 PM, gene heskett
wrote:
> > > On Friday, April 20, 2012 05:18:06 PM Dave Caroline did opine:
> > >> a common mistake is to assume colle
On 04/20/2012 06:20 PM, Peter C. Wallace wrote:
> A dozen or so shorted I/O lines is unlikely to cause FPGA damage (ask
> me how I know)
I can imagine... 5 years from now someone is looking at a LinuxCNC
configuration using a MESA card and wonders "Why is he using stepper
outputs 4, 5 and 6 for
On Fri, 20 Apr 2012, gene heskett wrote:
> Date: Fri, 20 Apr 2012 17:36:29 -0400
> From: gene heskett
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Relay driver not working
>
> On Frida
On Fri, Apr 20, 2012 at 10:36 PM, gene heskett wrote:
> On Friday, April 20, 2012 05:32:42 PM Dave Caroline did opine:
>
>> > It may be safe to ground the left end of that 220 ohm resistor, but
>> > I'd be tempted to use a 1k resistor as additional current limiting.
>>
>> NONO this user has alread
On Friday, April 20, 2012 05:32:42 PM Dave Caroline did opine:
> > It may be safe to ground the left end of that 220 ohm resistor, but
> > I'd be tempted to use a 1k resistor as additional current limiting.
>
> NONO this user has already killed a mesa card
>
If a 1k resistor to ground can kill a
On Fri, Apr 20, 2012 at 10:18 PM, gene heskett wrote:
> On Friday, April 20, 2012 05:18:06 PM Dave Caroline did opine:
>
>> a common mistake is to assume collector is the middle pin like the npn
>> but its the base
>>
>> Dave Caroline
>>
> This one, according to the data sheet, is conventional, wi
On Friday, April 20, 2012 05:19:30 PM Viesturs Lācis did opine:
> 2012/4/20 Dave Caroline :
> > Measure the base voltage in the two states relative to +5
>
> It changes from +5,07 VDC to 0,60 VDC. +5 actually are +5,17, so it
> means that base voltage swings from -0,1 to -4,57V, relative to +5V.
>
> It may be safe to ground the left end of that 220 ohm resistor, but I'd be
> tempted to use a 1k resistor as additional current limiting.
NONO this user has already killed a mesa card
>
Dave Caroline
--
For Developer
On Friday, April 20, 2012 05:18:06 PM Dave Caroline did opine:
> a common mistake is to assume collector is the middle pin like the npn
> but its the base
>
> Dave Caroline
>
This one, according to the data sheet, is conventional, with the collector
on the middle pin.
>
On Friday, April 20, 2012 04:10:40 PM Viesturs Lācis did opine:
> Hello, gentlemen!
>
> I would appreciate, if someone could advice, what is wrong with my diy
> relay driver.
> I built it according to this scheme:
> http://www.cutting.lv/fileadmin/user_upload/bd140_scheme.gif
>
> Relay is PE0140
Ok, I have 3 more BD140s to play with, so will try again tomorrow.
Viesturs
2012. gada 20. Apr. 18:24 "Dave Caroline"
rakstīja:
> There is no way a base can go beyond around .6 volts if the transistor
> is ok or it is connected correctly
>
> shorting the base to ground will kill the transistor u
There is no way a base can go beyond around .6 volts if the transistor
is ok or it is connected correctly
shorting the base to ground will kill the transistor unless the psu is rubbish
Dave Caroline
--
For Developers, A
2012/4/20 Dave Caroline :
> Measure the base voltage in the two states relative to +5
It changes from +5,07 VDC to 0,60 VDC. +5 actually are +5,17, so it
means that base voltage swings from -0,1 to -4,57V, relative to +5V.
But it does not work, even if I connect the base straight to GND,
which gav
a common mistake is to assume collector is the middle pin like the npn
but its the base
Dave Caroline
--
For Developers, A Lot Can Happen In A Second.
Boundary is the first to Know...and Tell You.
Monitor Your Application
Measure the base voltage in the two states relative to +5
Dave Caroline
On Fri, Apr 20, 2012 at 4:18 PM, Viesturs Lācis
wrote:
> Hello, gentlemen!
>
> I would appreciate, if someone could advice, what is wrong with my diy
> relay driver.
> I built it according to this scheme:
> http://www.cuttin
Hello, gentlemen!
I would appreciate, if someone could advice, what is wrong with my diy
relay driver.
I built it according to this scheme:
http://www.cutting.lv/fileadmin/user_upload/bd140_scheme.gif
Relay is PE014005:
http://www.te.com/catalog/pn/en/1393219-3
The transistor is BD140-16
http://
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