J
Jamie
Guest
Kris Krieger wrote:
I just checked it, it still works here.
http://webpages.charter.net/jamie_5"
browser.
I just checked it, it still works here.
http://webpages.charter.net/jamie_5"
J
John Fields
Guest
On Mon, 22 Sep 2008 15:53:23 -0700 (PDT), lerameur <lerameur@yahoo.com>
wrote:
Where's the block diagram you said you were going to post?
JF
wrote:
---
Where's the block diagram you said you were going to post?
JF
J
Jamie
Guest
lerameur wrote:
They are as accurate as my wife's driving.
http://webpages.charter.net/jamie_5"
They are as accurate as my wife's driving.
http://webpages.charter.net/jamie_5"
J
Jasen Betts
Guest
On 2008-09-22, lerameur <lerameur@yahoo.com> wrote:
the source and the gate of that FET.
In the first circuit M6 has 12V M8 has -0V and M2 has 24V
In the second circuit M8 has only about 4V and so is not saturated yet.
in the third it has about 6V the data sheet suggests that 10V will
saturate it.
if you put the 5 ohm resistor into the bottom of design5 and you should see
it acutually working. adding the 270 ohm resistors on the optocoupler
inputs may help too..
it doesn't need to be a direct connection.
Bye.
Jasen
it makes a big difference.
for turning FETS on the important voltage is the difference between
the source and the gate of that FET.
In the first circuit M6 has 12V M8 has -0V and M2 has 24V
In the second circuit M8 has only about 4V and so is not saturated yet.
in the third it has about 6V the data sheet suggests that 10V will
saturate it.
if you put the 5 ohm resistor into the bottom of design5 and you should see
it acutually working. adding the 270 ohm resistors on the optocoupler
inputs may help too..
no. some sort of ground connection is needed to put a charge onto a node.
it doesn't need to be a direct connection.
Bye.
Jasen
L
lerameur
Guest
On Sep 22, 7:23 pm, John Fields <jfie...@austininstruments.com> wrote:
the block diagram I started doing , is 1) pretty big
and 2) more complicated then the circuit I am showing right now.
DO you still want a block diagram?
K
John,
the block diagram I started doing , is 1) pretty big
and 2) more complicated then the circuit I am showing right now.
DO you still want a block diagram?
K
J
Jasen Betts
Guest
On 2008-09-23, lerameur <lerameur@yahoo.com> wrote:
Bye.
Jasen
D6 looks suspicious. where have all the voltage readings gone?
Bye.
Jasen
L
lerameur
Guest
On Sep 22, 7:23 pm, John Fields <jfie...@austininstruments.com> wrote:
Hi
I was able to reproduced the circuit using opto couplers :
http://www3.sympatico.ca/captoro/motor/design7.gif
Opto are not in this case cause it do not drive the mosfets to their
saturation, and for odd reason , the simulation did not reflect
reality.
I you of a way to replace the opto to have 30v to the gates that would
be amazing. I will send you an apple pie.
k
Hi
I was able to reproduced the circuit using opto couplers :
http://www3.sympatico.ca/captoro/motor/design7.gif
Opto are not in this case cause it do not drive the mosfets to their
saturation, and for odd reason , the simulation did not reflect
reality.
I you of a way to replace the opto to have 30v to the gates that would
be amazing. I will send you an apple pie.
k
J
John Fields
Guest
On Mon, 22 Sep 2008 16:33:05 -0700 (PDT), lerameur <lerameur@yahoo.com>
wrote:
Not if you can describe your application in greater detail.
JF
wrote:
---
Not if you can describe your application in greater detail.
JF
L
lerameur
Guest
On Sep 22, 9:43 pm, Jasen Betts <ja...@xnet.co.nz> wrote:
and John I made some simple box diagram. I will post them in a few
hours
k
I have added the voltage to the same link
and John I made some simple box diagram. I will post them in a few
hours
k
L
lerameur
Guest
On Sep 23, 7:44 am, lerameur <leram...@yahoo.com> wrote:
I posted another link up:
http://www3.sympatico.ca/captoro/motor/design8.gif
which I believe better describe what I want to do.
I posted another link up:
http://www3.sympatico.ca/captoro/motor/design8.gif
which I believe better describe what I want to do.
L
lerameur
Guest
I posted a box circuit up:
http://www3.sympatico.ca/captoro/motor/boxCircuit.gif
full circuit at
http://www3.sympatico.ca/captoro/motor/design9.gif
I am missing resistors in the opto coupler part I know, but the
simulation would work with them.
The circuit is made so I can two batteries in parallel to charge the
other two batteries in series.
The other step is to take the batteries in series, put them in
parallel , take the batteries in parallel and put them in series and
reverse the charging the other way.
This full circuit works if I build it and just set it up one way (like
design7). but when I set it up this way some mosfet just burns and
smoke.
k
http://www3.sympatico.ca/captoro/motor/boxCircuit.gif
full circuit at
http://www3.sympatico.ca/captoro/motor/design9.gif
I am missing resistors in the opto coupler part I know, but the
simulation would work with them.
The circuit is made so I can two batteries in parallel to charge the
other two batteries in series.
The other step is to take the batteries in series, put them in
parallel , take the batteries in parallel and put them in series and
reverse the charging the other way.
This full circuit works if I build it and just set it up one way (like
design7). but when I set it up this way some mosfet just burns and
smoke.
k
L
lerameur
Guest
On Sep 23, 8:45 am, lerameur <leram...@yahoo.com> wrote:
http://www3.sympatico.ca/captoro/motor/dccontrol.pdf
as can be seen, the darlington transistor operate the gates of the
mosfets, while the source and drain are at the positive and negative
of the batteries. He is doing the same thing here, where the grounds
of the transistor is not the same as the batteries. I guess his is
working...
k
I would to show a circuit done from Rod Hower:
http://www3.sympatico.ca/captoro/motor/dccontrol.pdf
as can be seen, the darlington transistor operate the gates of the
mosfets, while the source and drain are at the positive and negative
of the batteries. He is doing the same thing here, where the grounds
of the transistor is not the same as the batteries. I guess his is
working...
k
J
Jasen Betts
Guest
On 2008-09-23, lerameur <lerameur@yahoo.com> wrote:
use bigger diodes. (or don't use diodes if you don't need them)
1A is way too much to push through a 1N4148 diode
voltage readings both sides of V11, and between D6 and V13 would be useful.
M5 is close to saturation with 0.31V drop, but M3 I can't tell
Bye.
Jasen
the circuit appears to be basically working.
use bigger diodes. (or don't use diodes if you don't need them)
1A is way too much to push through a 1N4148 diode
voltage readings both sides of V11, and between D6 and V13 would be useful.
M5 is close to saturation with 0.31V drop, but M3 I can't tell
Bye.
Jasen
J
Jasen Betts
Guest
On 2008-09-23, lerameur <lerameur@yahoo.com> wrote:
looks like it's working, but those diodes are too small.
Bye.
Jasen
looks like it's working, but those diodes are too small.
Bye.
Jasen
L
lerameur
Guest
On Sep 24, 6:04 am, Jasen Betts <ja...@xnet.co.nz> wrote:
therefore I used the 4148 just for the simulation
k.
I am using 5 amp diode, they did not have them in the simulation.
therefore I used the 4148 just for the simulation
k.
L
lerameur
Guest
On Sep 24, 7:22 am, lerameur <leram...@yahoo.com> wrote:
I found a problem on my breadboard. I tested the conductivity along
the negative and positive, showed me that there was a link. But when I
put voltage on the line it does not appear anywhere, this is weird.
anyhow I used another line and seems to be working. have fully tested
the circuit yet.
k
hello,
I found a problem on my breadboard. I tested the conductivity along
the negative and positive, showed me that there was a link. But when I
put voltage on the line it does not appear anywhere, this is weird.
anyhow I used another line and seems to be working. have fully tested
the circuit yet.
k
J
Jasen Betts
Guest
On 2008-09-24, lerameur <lerameur@yahoo.com> wrote:
that much through it. It's probably better to use 5 1A diodes 1n4000
in parallel in the simulation. (this will work better in the simulation
than it will in real life)
Bye.
Jasen
1N4148 is only good for about 75mA and you're putting 20 times
that much through it. It's probably better to use 5 1A diodes 1n4000
in parallel in the simulation. (this will work better in the simulation
than it will in real life)
Bye.
Jasen
L
lerameur
Guest
On Sep 25, 5:35 am, Jasen Betts <ja...@xnet.co.nz> wrote:
first.
So the idea worked , about having a 30v input to the gate that do not
have the same ground as the batteries. I just need to saturate the
body of the mosfet to make it active.
ken
But I would like to get away from the optocoupler like I said at
first.
So the idea worked , about having a 30v input to the gate that do not
have the same ground as the batteries. I just need to saturate the
body of the mosfet to make it active.
ken
R
Robert Monsen
Guest
On Sun, 21 Sep 2008 09:32:10 -0700 (PDT), lerameur
<lerameur@yahoo.com> wrote:
are inherently bidirectional. You need to remember that most mosfets
have a diode from drain to source which will prevent your mosfet
switches from turning off.
Also, I agree with whomever pointed out that you probably want to
charge all the batteries in parallel. You may want to chop one out if
it is bad, so the relays can be used for that.
If you don't like the sound of all that clicking, you can use solid
state relays, which are pricy, but might last longer.
http://www.vishay.com/solid-state-relays/
Regards,
Bob Monsen
<lerameur@yahoo.com> wrote:
Actual relays will be much easier to use with a microcontroller, and
are inherently bidirectional. You need to remember that most mosfets
have a diode from drain to source which will prevent your mosfet
switches from turning off.
Also, I agree with whomever pointed out that you probably want to
charge all the batteries in parallel. You may want to chop one out if
it is bad, so the relays can be used for that.
If you don't like the sound of all that clicking, you can use solid
state relays, which are pricy, but might last longer.
http://www.vishay.com/solid-state-relays/
Regards,
Bob Monsen
J
Jamie
Guest
lerameur wrote:
Look for optocouplers.
Below is a good component and many like it.
http://www.supertex.com/pdf/app_notes/AN-D26.pdf
the application notes should give you some lead way.
http://webpages.charter.net/jamie_5"
Look for optocouplers.
Below is a good component and many like it.
http://www.supertex.com/pdf/app_notes/AN-D26.pdf
the application notes should give you some lead way.
http://webpages.charter.net/jamie_5"