Search found 28 matches

by Droidwerkz
Sun Jan 27, 2008 1:46 am
Forum: Robotics
Topic: Looking for a microcontroller, need suggestions.
Replies: 13
Views: 7496

during my time at motorola , i worked extensively with R-NET rf telemetry modems. they worked well. they were even used on the mars rover.
by Droidwerkz
Sat Jan 26, 2008 12:36 pm
Forum: General Discussion
Topic: Getting started wire wrapping (or prototyping like this)
Replies: 13
Views: 2548

whenever i use wire wrap wire for prototyping , i never use the little tool. i take the wire, wrap it around the component lead once or twice , and solder it to the lead. typically the iron will melt right through the insulation and you will have no continuity problem, this also allows you to make m...
by Droidwerkz
Fri Jan 25, 2008 4:09 am
Forum: Robotics
Topic: servo help
Replies: 4
Views: 3718

really what has to be done is to program a microcontroller to run a predefined set of instructions which turn a motor or activate a solenoid to run compressed air through a piston to activate the mouth. you would then have to either use an instruction from the microcontroller to start the cd player ...
by Droidwerkz
Fri Jan 25, 2008 4:00 am
Forum: Robotics
Topic: Motor Speed Steering Control or Servo Steering Control?
Replies: 3
Views: 2980

really what the debate is here is skid steer vs a tricycle type design right? dc servo's come in many sizes all the way up to enormous 100 + volt servos used in large high precision machine tools. they can be cost prohibitive at that size, but they are out there. keep your eye out too, because somet...
by Droidwerkz
Fri Jan 25, 2008 3:19 am
Forum: General Discussion
Topic: CHANGE 3phase to 'single phase 60Hz ...???
Replies: 12
Views: 4592

YEAH . i didn't look at the dat of the orgiginal post ...sorry guys!!!(and gals) :lol:
by Droidwerkz
Fri Jan 25, 2008 3:15 am
Forum: General Discussion
Topic: European Espresso maker installed and wired for US use
Replies: 23
Views: 5042

i have to disagree about this "two phase" thing for an electric dryer...220 really is a single phase, the sinewave is split in half by the nuetral , and "two phase" only applies when you have a 220 , and a 110 tap. but then it is using a split phase tap which means that the appliances 220 components...
by Droidwerkz
Fri Jan 25, 2008 2:45 am
Forum: General Discussion
Topic: Relay chatter
Replies: 27
Views: 7190

I've run into this problem before with indutrial dc relays (big , 125 amp suckers) with 40VDC coil voltage at about 1/2 amp throwing current pull. the problem we had was with the current draw being too high for the source to effectively source. the relay would pull closed, open , pull closed , and o...
by Droidwerkz
Thu Jan 24, 2008 2:08 am
Forum: Robotics
Topic: servo test help
Replies: 7
Views: 4133

great , I already knew about that , but more goes into a robot than a microcontroller.
by Droidwerkz
Mon Jan 21, 2008 12:01 am
Forum: Robotics
Topic: servo test help
Replies: 7
Views: 4133

typically radio shack is one of the worst electronics stores in this area, all they sell is overpriced crap anymore. i went to RS looking for a cat 5 patch cable. last week , and they wanted 7.99 for a 6 footer!!! OMG i went to our local industrial electronics store, and picked them up for 2.99 a pi...
by Droidwerkz
Sun Jan 13, 2008 11:34 pm
Forum: Robotics
Topic: looking for quality plastic gears
Replies: 5
Views: 4627

by Droidwerkz
Sun Jan 13, 2008 11:12 pm
Forum: Robotics
Topic: Motor recommendation
Replies: 5
Views: 4539

i have found that old c-band satellite dish azimuth postioners (jack-shafts) which are linears actuators use a nice 36 volt high torque motor to drive the jack-screw, what i do is drive around town, looking for old c-band satellite dishes, if i find one , i talk to the owner, most people don't use t...
by Droidwerkz
Sun Jan 13, 2008 5:10 pm
Forum: General Discussion
Topic: Paypal, usage, etc.
Replies: 17
Views: 4281

i have had really good experiences with pay pal , including one in which i found 500$ in my pay pal account that i didn't even know i had! talk about a great service!!!! (or my own forgetfullness!) still, paypal is a great convenience!
by Droidwerkz
Sun Jan 13, 2008 5:51 am
Forum: Up For Grabs
Topic: 3 New "Bimba" brand pnumatic cylinders
Replies: 6
Views: 4874

form everything i've seen with ordering pneumatic cylinders from many different manufacturers the "b" at the end of the product numbers usually mean "base mount" like wise "n" is a nose mount" "c" is a clevis mount.
by Droidwerkz
Sun Jan 13, 2008 5:41 am
Forum: General Discussion
Topic: CHANGE 3phase to 'single phase 60Hz ...???
Replies: 12
Views: 4592

i discussed dropping three phase from the pole to my shop , it comes with a hefty fee! just an idea here, but: Why not find a single phase reversible ac motor with the same housing standard as the 3 phase hoist motor (industrial motors typically use standard flanges, and are known by ASME standards ...
by Droidwerkz
Sun Jan 13, 2008 5:32 am
Forum: General Discussion
Topic: Merging / splitting DC/AC signals sharing a conductor...
Replies: 16
Views: 3781

what about a diplexer of the type used for running a tv signal over the same cable as powered lnb's in satellite systems? there is a dc power passing i/o side and a dc blocking ac passing side and they are readily available from satellite dish installers, they use a standard 75 ohm connection for bo...