In article ,
"Richard Crowley" wrote:
"EADGBE" wrote ...
The anode of the diode is attached directly to three of the resistors
as shown.
I have tried to re-create the circuit board traces on the other side.
The cathode connects to what N_Cook has described as an inductor.
Take a look at this photo:
http://i240.photobucket.com/albums/f...e123/DIODE.jpg
Thanks to everyone for your help so far.
Any chance of finding a replacement for this diode?
Depending on what the actual diagram looks like,
it is quite possibly a simple, generic silicon diode
like a 1N4001 (power rectifier) or maybe even a
popular signal diode like a 1N4148, etc. These
are both very common parts that likely cost only
a few cents in production quantities.
I believe it takes at least two transistors. It's a positive feedback
system to compensate for losses in the motor, creating a virtual perfect
motor that doesn't change speeds under load. And that brings about the
second problem...
The circuit has only one pot so it's not going to work on a worn motor.
The loss compensation is a fixed resistor so it's only good for a motor
in perfect condition.
--
Google is a pro-spamming service. I will not see your reply if you use Google.