T&L Publications

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.

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...

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 ...

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...

YEAH . i didn't look at the dat of the orgiginal post ...sorry guys!!!(and gals)

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 appli...

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...

great , I already knew about that , but more goes into a robot than a microcontroller.

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...

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...

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!

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.

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 ...

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...