Automatic night lamp (EE004) part query

[Daniel]

im looking to make this, however the link for the shop isn’t linking directly to a product. and there is no spacfic dtails on the LDR

anybody know the specs to the LDR. you can find the project on Engineers Garage. “automatic night lamp”

 

(would put a link but the froums assume i’m a spamer and keep blocking my posts)

[AJISH ALFRED]

Hi Daniel,
The output from an LDR not only depends on its own features but also the lighting conditions of the environment in which you are using it.
My point is that you can use any commonly available LDR, all of them have resistance at a given lighting condition in a particular range only.
When you install the circuit at any place the variable resistor at the input of LM339 allows you to adjust the circuit’s response.

[Daniel]

ok. i just built the protoboard however i’m having a strage issue. it works fine. but when it gets TOO dark. it goes back out. i think the relay may be the issue. its a TINY SMD type. and i dont think it supports the 240ma i’m trying to drive. so i tried “bypassing it” while it was installed. that ended in tragity as every single LED got blown.

 

i’m ordering a tridiginal mechanical 1 amp relay that switches with only 1.5v hopefully this will fix the issue

[Author]

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