Timeline for Can you determine needed input voltage from just looking at this circuitboard?
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Jul 8, 2018 at 10:14 | vote | accept | 111936 | ||
| Jul 8, 2018 at 7:32 | answer | added | Vince Patron | timeline score: 5 | |
| Jul 8, 2018 at 4:59 | comment | added | 111936 | Part lookup for the U4 and U7 components: I have tried very hard, but seem to be unable to find anything. The comment at the end of this question seems to explain why - that these tiny parts are very hard to I.D. - electronics.stackexchange.com/questions/334128/… | |
| Jul 8, 2018 at 4:16 | comment | added | 111936 | Re: Value of parts - They are a few hundred each, and I am in a nonprofit situation so just buying other equipment isn't going to happen. If I can make these work I should because I'm trying to do some good at a local level by supplying basic stage lighting to local schools at no cost, and if I can't then they'll get sold off and I'll be forced to Arduino my way to a remote movement solution, which is not nearly as desirable as a purpose built item like these. So in short - spending time on this is worth it to me - I just wish learning about any of this was less painfully hard. | |
| Jul 8, 2018 at 3:56 | comment | added | D.A.S. | Chalk the smoke up to experience not guess and apply non limited power to pins. Where did you get these parts and what was it worth? | |
| Jul 8, 2018 at 3:27 | comment | added | 111936 | The VERY basic diagram for the RJ45 input board that I have posted took me an hour to do and was challenging to trace things. If I really must draw out this massively more complex board I guess I will begin that process, but the thought of it makes me nearly weep. It may be weeks. | |
| Jul 8, 2018 at 3:24 | comment | added | 111936 | U7 and U4 are both labeled with "C2" over "9A". Googling the exact term <"C2 9A"> along with many different additional words like regulator, part, chip, part search, printed on it, electronics, component - these all got me NOTHING useful regarding any electronics parts that look like that one does. I am happy to do the work of finding and posting this information, I just don't know how to FIND the data sheet for a thing on a circuitboard if the printed information ON the object gets me nowhere! | |
| Jul 8, 2018 at 3:24 | comment | added | 111936 | Using red and black wire colours as polarity indicators, I connected 5v DC to the board. Likely or not- smoking board is what happened. | |
| Jul 8, 2018 at 2:23 | comment | added | Bruce Abbott | "5v makes it smoke" - That is unlikely. Are you sure you applied the voltage correctly? Unfortunately your photos are not clear enough to see all the device markings. At a minimum you should identify regulators U4 and U7, then read their datasheets to find out what they can take. For a full understanding I suggest tracing the entire circuit. Then post it here. Also tell us as much as you can about the motor (markings, winding resistance...) | |
| Jul 8, 2018 at 2:14 | comment | added | 111936 | @TonyEErocketscientist - if this is an answer could you please post it as an answer not as a comment? | |
| Jul 8, 2018 at 2:12 | comment | added | D.A.S. | No this is not possible unless you have interface experience unless you the experience to design one like this. Too late . Look for alternative solutions | |
| Jul 8, 2018 at 2:04 | history | edited | 111936 | CC BY-SA 4.0 |
Added pic of everything connected
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| Jul 8, 2018 at 1:44 | history | asked | 111936 | CC BY-SA 4.0 |