Subject:
|
RE: Oops! Darn diode/fuse
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Wed, 14 Feb 2001 05:21:00 GMT
|
Original-From:
|
Jim Choate <RAVAGE@EINSTEIN.SSZ.nospamCOM>
|
Viewed:
|
758 times
|
| |
|
|
Why can't this list have a Reply To: block?...
On Tue, 13 Feb 2001, ill13 wrote:
> Heh...I left out the key word...That being what's the "MAXIMUM" voltage
> and/or mA it'll take. I want those 'lil motors running with max
> torque/output -but I'd rather not fry my RCX's 'lil brain. And even #24
> guage is just a wee bit too big for soldering on to SMT boards (umm...just
> to clarify SMT being [S]urface [M]ount [T]echnology). -Shoot, if you can
> cleanly solder #22 to SMT PCB boards you are way more hardcore than me! :)
I'm looking at my V1.0, just behind the power connector there are two
small rectangular components. They don't have a band on them (probably not
a diode as even SMT diodes have cathode marks). Probably not a resistor as
they have no printing on them, though they could be custom. There is at
least one other similar component on the L. side (with the power conn.
facing you).
Are those what you're speaking of? If then yeah, tight it would be, but I
suspect that after a couple of practice tries I could place a short piece
of #22 there. #22 's not that large. The main problem would be that it's
going to be nearly 'square'. But your point is well taken. I'd actually go
with wire wrap wire after looking at it. Pre-tin that baby and hit it with
a blast of N at about 650-700F and it'll set as one piece. I'm assuming
you did measure the other component and found it to be low resistance both
ways (of course why a reverse biased diode should blow without
over-voltage <shrug>)?
The component I had in mind is the one on the battery terminal. It's about
the size of a 1/16W resistor. It's next to two big black electrolytics.
I took mine apart and ran a Ohm check, on both x200 and x200K they show
open. <shrug>
I'd say it would be worth the trouble for some other brave soul with a RCX
and a VOM to verify the value of their RCX. It might be the two chips are
caps or some sort of bleeder resistor (though I don't understand the high
value)...
Is there a accurate schematic?
____________________________________________________________________
Before a larger group can see the virtue of an idea, a
smaller group must first understand it.
"Stranger Suns"
George Zebrowski
The Armadillo Group ,::////;::-. James Choate
Austin, Tx /:'///// ``::>/|/ ravage@ssz.com
www.ssz.com .', |||| `/( e\ 512-451-7087
-====~~mm-'`-```-mm --'-
--------------------------------------------------------------------
|
|
Message is in Reply To:
 | | RE: Oops! Darn diode/fuse
|
| Heh...I left out the key word...That being what's the "MAXIMUM" voltage and/or mA it'll take. I want those 'lil motors running with max torque/output -but I'd rather not fry my RCX's 'lil brain. And even #24 guage is just a wee bit too big for (...) (24 years ago, 14-Feb-01, to lugnet.robotics)
|
2 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
Active threads in Robotics
|
|
|
|
|
|
