Hi,
I'm very new to electronics stuff, trying to learn it with my young son. We've been soldering together some basic kits from ebay which has gone well so far.
We've just put together an IR proximity detector, though, and it appears to work backwards to the description. It says it should light up and sound the buzzer when waving a hand near it, but it seems to light up and sound all the time but STOP when I put my hand near it.
The schematic:
Partslist:
Circuit board:
Any suggestions for how I try debugging this?
Ebay posting in case it can help; not trying to advertise it:
https://www.ebay.co.uk/itm/10pcs-DI...m-Electronic-Circuit-Suite-DC-5V/352963796317
(Hope this is the right subforum for it. Wasn't sure if here or 'homework' was better.)
I'm very new to electronics stuff, trying to learn it with my young son. We've been soldering together some basic kits from ebay which has gone well so far.
We've just put together an IR proximity detector, though, and it appears to work backwards to the description. It says it should light up and sound the buzzer when waving a hand near it, but it seems to light up and sound all the time but STOP when I put my hand near it.
The schematic:
Partslist:
Circuit board:
Any suggestions for how I try debugging this?
Ebay posting in case it can help; not trying to advertise it:
https://www.ebay.co.uk/itm/10pcs-DI...m-Electronic-Circuit-Suite-DC-5V/352963796317
(Hope this is the right subforum for it. Wasn't sure if here or 'homework' was better.)