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    Help repairing wireless doorbell

    Reference to photo 3.....sand away some of the dark blue area around the break until you get to clean copper board. Do the same with the blue section of photo 4. Trial fit parts back together and epoxy on the OPPOSITE side to where you just cleaned. When epoxy is good and hard(usually 24 hours)...
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    Motion sensing

    Operating in full sunlight can make any type of light sensing more complex. Suns rays tend to interfere with just about everything along those lines and needs probably a lot of work to be consistent. Arduino "time of flight" minature (radar) sensors are dead accurate and with a relatively small...
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    Motion sensing

    Does the tube approach from just one direction? If so, is that direction on the same plane or a z axis? Is there any other movement in the vicinity of the detect zone of 15ft? How large is the tube in height? Are there environmental restrictions imposed if any type of light sensing is involved...
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    Induction wall socket/outlet to replace BS1362 standard ?

    Each transformer powered 1 only outlet in the operating theatre. There was a total of 25 transformers in the enclosure. Each point was monitored by an earth leakage system with adjustable alarm points from 1 to 5 mA. No trip, just alarm. Along with approx. 5 klm of 6mm2 earthing run to "cardiac...
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    Induction wall socket/outlet to replace BS1362 standard ?

    Think you'll find a rather large transformer, both inside and outside of the wall would be the killer......we installed 10A isolation transformers for an operating room and each were around the 40kg mark.......doubt your magnets would be any use there.
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    Induction wall socket/outlet to replace BS1362 standard ?

    What is an " induction wall socket"...never seen reference to or example of anywhere before. If it's an idea relative to wireless phone charging, I think you'll find the associated equipment too large and costly to be of any practical use. Safety switches and proper earthing along with proper...
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    How to ensure it is working

    Output on the digital unit shows pullup resistor on the output so I'd imagine as it detects a surface within range to output would go low.
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    Please Identify

    Same applies here as in this post........ Might work. Either way, great piece of cheap gear to have in the toolbox. https://www.electronicspoint.com/forums/threads/how-to-identify-pins.295555/#post-1817631
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    Can BC548 be replaced by 2N3906 and 2N3904?

    Best show the circuit.
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    How to identify pins

    Look up the spec sheet on any search engine. Transistors are usually viewed from the underside to get correct pinout. Connecting the wrong way usually ends up in disaster, and it lets the smoke out. Other than that, there is a very cheap test device shown as an example below. Can be invaluable...
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    Relay Type?

    That would be the switch internal LED and associated resistor. Software is old....circuitmaker 2000 but there are others out there and some free these days for hobby use etc.
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    Relay Type?

    Do not see any changes...however...simple diagram......
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    Relay Type?

    One photo didn't show. What is the device first photo right side?
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    cannot log in on pc

    Tried that....came up with.......error, requested member could not be found
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    cannot log in on pc

    eeeeeeeeeeeeeeekkkkkkkkkkk.....(mobile scream ,cause I can't login)…....o_Oo_Oo_O yes, sent message to "contact us" as well but no word back yet
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    12v DC Doorbell Chime

    Nope...completely out of the loop. NBN fibre to the node here....i.e. copper line to the house from a terminal over 1 klm away......many places the same and I doubt it'll ever change now.
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    Relay Type?

    show your wiring diagram.
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    cannot log in on pc

    Also only way I can operate is on my mobile which is constantly logged in. Clearing cache no go....and if anyone says turn your pc off then back on again, I'll scream... :) Also tried different browser but no go there either.
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    cannot log in on pc

    Just started this morning....go to log in page, fill in username and password as usual, hit sign in and new screen comes up to log in again. Currently accessing on my phone. Sent through an email but no reply so far.
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    12v DC to 24v 50Hz AC square-wave 500mA: transformer & transistor?

    555 and an up converter mosfet on the 555 output
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