Hello everyone, I have one of the old (but still useful) EVBU boards with a HC711E9 on it. I've interfaced a DS1230 (32K x 8) NVRAM for use in expanded mode....
22663
Honea
tr3nd42
Mar 1, 2005 5:34 pm
Hello, I just ripped some servos out of my dad's 10 or15 year old model airplane (yes he said i could use them :) ), but I am not sure the wiring scheme or...
22664
jgregor@...
jgregorus
Mar 1, 2005 6:37 pm
Hi Lee, forgot to answer about the 'indirect drive' part....duhhh.... It may be referring to how the internal pot is driven... --John ... From: Honea...
22665
jgregor@...
jgregorus
Mar 1, 2005 6:39 pm
Hi Lee, Couldn't quite make out your picture...(kind of dark)... a couple of things to look for... it should be a 3 wire connector (some really old servos...
22666
Joe Shell
iamjoeshell
Mar 1, 2005 6:52 pm
Servo Terminology: Indirect Drive - This refers to the potentiometer inside the servo. The final output shaft (the part that the horn/arm attaches) has to be...
22667
Jay Prince
drgnfy
Mar 1, 2005 8:36 pm
Hi.. I've been pulling together a design for a robot that has a disparate set of components. Unfortunately, the different subsystems have differing power...
22668
Steve Bennett
trnsdogs
Mar 1, 2005 10:10 pm
Hi Jay You may want to look into rolling your own DC-DC using either the National simple switcher parts or the Linear tech parts. Both suppliers have plenty...
22669
videogrfx@...
videogrfx
Mar 2, 2005 2:02 am
I'm looking for the smallest quick connects I can find for wire 22 or 24 gauge. I haven't seen molex type connectors with male/female connections. Right now...
22670
karl lunt
karllunt@...
Mar 2, 2005 3:59 am
For those who might be interested... Karl ... [Non-text portions of this message have been removed]...
22671
karl lunt
karllunt@...
Mar 2, 2005 4:00 am
For those who might be interested... Karl ... [Non-text portions of this message have been removed]...
22672
Ted Larson
ted_srf_dude
Mar 2, 2005 4:55 am
Not to sound like a broken record..but, if you have a Robomagellan robot, you really need to bring it down to SF for the Robolympics at the end of this month....
22673
Triffid Hunter
triffid_hunter
Mar 2, 2005 8:17 am
I have a bootstrap program at http://funkmunch.net/hc11-ide/ that you may be able to use. It fits into zero page ram, and accepts .S19 files directly via the ...
22674
GrantM.
solargrant
Mar 2, 2005 4:40 pm
... Why avoid cutting aluminum with a plasma torch? I have done a bit of plama cutting and it works great, the edge isn't as clean as a shear cut but you can't...
22675
Charles
cthurston@...
Mar 2, 2005 11:48 pm
Hello SeattleRobotics, No mail in the inbox from the list so I was just testing. -- Best regards, Charles mailto:cthurston@......
22676
sparticus15b
Mar 3, 2005 4:23 am
Thanks everyone for your suggestions--you've helped out a lot! -Michael (Currently in South Korea)...
22677
Doug Leppard
DougLeppard
Mar 3, 2005 11:40 am
Because of FIRST I am way behind my reading of these threads. This is one of the better ideas, could read each pot 180 degrees out of phase pot each into its...
22678
Tom Capon
robot_mechan...
Mar 3, 2005 12:34 pm
There's always metal-cutting bandsaws. They may be safer (or cheaper) than plasma cutting, and can still cut some pretty big pieces. Grizzly.com has one for...
22679
Rich Chandler
mauser712
Mar 3, 2005 9:02 pm
http://abcnews.go.com/Business/print?id=545978...
22680
mansugi@...
abs80634
Mar 3, 2005 9:42 pm
Hi Everyone, I got one of those Pittman PM9413-2 motors and using a Machine Lab ESC (PWM version) to run it. The problem is, it is producing a high pitch...
22681
Jim McBride
jymmyrig
Mar 3, 2005 11:03 pm
What PWM cycle are you using? ... JIMc x22661 National Ignition Facility...
22682
Azman Sugi
abs80634
Mar 4, 2005 3:22 am
I think it is 1.0 millisecond to 2.0 millisecond pulse control. 1.5 millisecond dead band. That's all I know. Here is the link. ...
22683
Steve Bennett
trnsdogs
Mar 4, 2005 6:09 am
Hi I think the "squeelies" are a fact of life with PWM drive. It seems that the PWM frequency " sweet spot" for driving small PM motors is well within our...
22684
tbrenke@...
trbrenke
Mar 4, 2005 7:55 am
500 Hz chopping rate to keep transistors cool writen on the page. 500Hz is a bit slow...
22685
mansugi@...
abs80634
Mar 4, 2005 3:00 pm
Any suggestions or recommendations that I should and could do? Like putting a capacitor or something like that..... Or I am pretty much screwed. Thanks Azman ...
22686
Chuck Harrison
c_f_harrison
Mar 4, 2005 5:44 pm
Hi, One thing that has been effective for me in the past is adding a large inductance in series with the motor. Such things tend to be bulky (considering they...
22687
mansugi@...
abs80634
Mar 4, 2005 6:16 pm
That is a great idea. Can you please be more specific about inductance. Where can I buy it and also how to add them in series. TIA. Azman ... [Non-text...
22688
Jeff Sampson
jws8675309
Mar 4, 2005 6:17 pm
First thing to consider when building a power system like this is to look at the biggest power demand. In your case it is the motors. If you can size your...
22689
Rich Chandler
mauser712
Mar 4, 2005 7:52 pm
I've been curious for a long time. Physically, how does the motor produce sound? -- "From Each according to his Abilities, To Each according to his Needs" is...
22690
wizard@...
Mar 4, 2005 8:53 pm
Hey Tom, do you have link for this saw.... I went to the grizzly site and found a saw for $1,895.00 but not for no $180.00. Kevin Impson...
22691
Jay Prince
drgnfy
Mar 4, 2005 10:33 pm
Dropped the list from the CC. ... From: Jay Prince <jayprince@...> Date: Fri, 4 Mar 2005 14:32:26 -0800 Subject: Re: DC-DC power supply recommendations? ...
