Can you help me figure out what this component is? - Page 1
Forum section: electronics / beginners

author: cncman
author_rank: Newbie
timestamp: September 08, 2019, 09:05:39 pm
content: Hi all,Newbie question. I need to replace a broken component from a momentary remote push button. The component has a dark (chocolate) brown case, looks like a resistor, measures 200 Ohm across the leads, and has a color code that doesn't match the resistor chart. Red, Black, Brown, Red, then a wider White band.Thanks for the help,Ben

author: Buriedcode
author_rank: Super Contributor
timestamp: September 08, 2019, 09:10:30 pm
content: A picture would be helpful. The colours red, black, brown do indicate 200ohms (2, 0, 1*10 multiplier). And resistors do come in different case colours with brown being common in slightly older equipment.So I'll say 90% sure its a 200ohm resistor, but the wattage depends on the size and to some extend to type (carbon, wirewound, metal film etc..).With that said - how did you measure it if its broken? Was one of the leads broken or was it snapped in half?

author: cncman
author_rank: Newbie
timestamp: September 08, 2019, 10:30:10 pm
content: One of the leads is broken and not long enough for me to solder.

author: cncman
author_rank: Newbie
timestamp: September 08, 2019, 11:21:50 pm
content: I hope these pics are good enough.

author: tooki
author_rank: Super Contributor
timestamp: September 09, 2019, 01:14:16 am
content: Quote from: cncman on September 08, 2019, 11:21:50 pmYou are joking, right?You could have cropped off 95% of each image. But it’s so blurry as to add absolutely nothing. Try again, using a better camera or better light, and crop before uploading.

author: mikerj
author_rank: Super Contributor
timestamp: September 09, 2019, 08:23:12 am
content: If the white band is actually silver, then it could be a 200uH inductor though the resistance is very high (probably 10 times higher than I'd expect).

author: Totalsolutions
author_rank: Contributor
timestamp: September 09, 2019, 10:53:46 am
content: Why can’t you solder to that you are in the repair business. Take a suitable sized wire and do it. Issue gone.

author: Buriedcode
author_rank: Super Contributor
timestamp: September 09, 2019, 01:08:11 pm
content: It looks a bit like an axial inductor to me. But again, could still be a resistor, especially as the colour code matches the resistance Both are plausible in a switch. I would just solder in a similar sized resistor (can't tell teh size from that pic, nothing to show scale), or two 100ohm ones in series. If the equipment works, it works, unless there's something funky about the switch gear, like its switching mains, it shouldn't hurt.But really, more context would be helpful for others - what equipment was this in? (manufacturers, part numbers) and what does this equipment do?

author: Jwillis
author_rank: Super Contributor
timestamp: September 09, 2019, 07:50:16 pm
content: Just looks like an older Flame-retardant resistor to me .But Buriedcode could be correct as well .The white band could be a custom tolerance.

author: cncman
author_rank: Newbie
timestamp: September 10, 2019, 02:57:22 am
content: QuoteSorry, I don't have a better camera. The one on my phone is the only one I have right now and my phones get ruined because I work in a machine shop.I've drawn a schematic of the switch using an online tool. I've drawn the "mystery" component as a resistor. Circuit polarity and voltage is still unknown. It's just a remote Go/Stop Button for a CNC milling machine called a TRAK DPM.QuoteThe white band is definitely whiteThanks for being helpful and patient with me.I just saw a mistake in my schematic. The Cap is actually .1uFSorry.

author: Jwillis
author_rank: Super Contributor
timestamp: September 10, 2019, 06:18:36 am
content: Arc suppression? But I thought the resistor should be in series with the cap parallel to switch.

author: Siwastaja
author_rank: Super Contributor
timestamp: September 10, 2019, 07:11:28 am
content: If the color code says 200 ohms, and it measures exactly 200 ohms, why it would be anything else than a 200 ohm resistor?

author: mayor
author_rank: Regular Contributor
timestamp: September 10, 2019, 08:49:25 am
content: Isn't it just a LP filter used as a switch debounce?

author: cncman
author_rank: Newbie
timestamp: September 10, 2019, 06:13:03 pm
content: It must be a resistor.I was able to check port on the machine and found 5V at 3.43mA.

author: FreddieChopin
author_rank: Regular Contributor
timestamp: September 10, 2019, 07:15:16 pm
content: I wonder from what year is that resistor tho. It's perfectly round while most currently made ones are like -OoO- shape (wider at front and rear and thin inside).

author: cncman
author_rank: Newbie
timestamp: September 11, 2019, 02:59:04 am
content: QuoteI'm guessing it's from the mid 90's, or at least that's when the machine it was attached to was made and sold.The resistor is tiny. About the size of an uncooked grain of rice. Either it was used for its size, or it was cheap surplus at the time.

author: Jwillis
author_rank: Super Contributor
timestamp: September 11, 2019, 06:56:36 am
content: I found a thread of someone retrofitting a CNC with a similar switch and it turns out that the circuit is the same as yours and the resistor has a very close value of 220 Ohms.https://www.cnczone.com/forums/want-to-buy-need-help-/147799-cnc.htmlhope this helps

author: cncman
author_rank: Newbie
timestamp: September 11, 2019, 08:32:04 pm
content: Yup, that will be the same switch. They use it on all prototrak machines.