Current set resistor-G203v

[C.Michael]

Hi everyone..Trying to wire everything up..My steppers from Kelling are rated at 6 amps..(1200in/oz)so as the top of the gecko 203v case says,I need a 270k resister..down at radio shack,they don't have that exact # resister..the closest they have is a 220k..but they also have a 50k resistor..can I put the 2 resisters in parallel to make it work or will that be bad.??Parallel to me means that one end of each resister goes into one terminal on the drive and the other 2 ends go into the other terminal..can I get away with this or do I need to find the exact resister to make this work? Mike

[Greolt]

Putting a 220k and a 50k in parallel will give you about 41k. Not what you need.

In series will give you 270k.

However 270k is a common value. Should be easy to get.

Greg

[C.Michael]

Hi Greg...Thanks for the reply..you are right ..find the right resister and do it right..down at radio shack ,they had a drawer with all sorts of # resisters but nothing exact..I guess I will look on line to find them...I put in a single 220k resister and the motors ran fine,but at that # it is less than the full 6 amps.maybe about 5.5 amps..Ill just find the right resister and move on..Thanks again..Mike

[millman52]

I agree with Greg in 1 resister is better (less chance of a faulty connection). You can Series them (placed end to end) & get what you need. I have done it & solder the 2 twisted ends.

If memory serves me Gecko's instruction sheet calls for within 5% so 263-277K 1/4 watt.

Like I said from memory. Anyone please correct me if wrong.

[Zumba]

270Ks are plentiful. I got a ton of them at Fry's.

[LeeWay]

Radio shack carries a bundle of assorted resistors. About 500 I think. I bought this set locally. I think it was $14, but I have resistors now. I am pretty sure this kit has 270K.

I have done the end to end thing as well. It works fine. I didn't use solder, but did cover them with shrink tube. Makes a nice small insulated package to connect into the gecko's.

[millman52]

Originally Posted by LeeWay Radio shack carries a bundle of assorted resistors. About 500 I think. I bought this set locally. I think it was $14, but I have resistors now. I am pretty sure this kit has 270K. I have done the end to end thing as well. It works fine. I didn't use solder, but did cover them with shrink tube. Makes a nice small insulated package to connect into the gecko's.

I used heat shrink over the body & soldered splice of the resistors also didn't look so medievel. I am out in the country so far the nearest tiny Radio Shack is 1 hr 15 min away.

I have a small drawer full of resistors most of them the older "brown" bodied & twice the size of todays. (from the days of TVs having vacuum tubes in them) LOL Got to be pretty old to even know there is such a thing as tubes & a 26" TV weighed 300#.

Anyway you can parallel 15 of them together to arrive at the value you need in a pinch. Just be sure you have tight or sloder connections to keep vibration from creating an ever changing resistor from gain & loss in the connections.

[Greolt]

Originally Posted by millman52 Anyway you can parallel 15 of them together to arrive at the value you need in a pinch.

Yes you can but the resistance you end up with is always less than the lowest value used.

Don't just add them all together. That is for when they are in series.

The formula for parallel is, 1 / R = 1 / R1 + 1 / R2 + 1 / R3 +...

Greg