DIY time-delayed night light from EFOP engineer

He has 2 children with bunk bed. Every night before go to bed, the old brother has to turn off the light and then climb to his bed. After turn off the light, all room is dark, it is dangerous. Then he claimed to his dad, if there is a night lamp which could be delayed off after I push the switch.

Then below picture lamp come out…

If it’s a DIY night light, it will be off after around 1 min after push the switch. It will be enough the old brother climb to his bed.

The hand made experience:

After the welding we found that the lamp was very dark, and the reason could not be found. The schematic and the PCB were not seen once. The difference between the schematic and the physical object was found. The reason was that the triode was packaged incorrectly. 1, 2, and 3 were respectively e. , b, c; and the actual board is c, b, e. Therefore, it is best to do the packaging yourself when drawing pictures. Do not replace the package at will. The simplest circuit must also be checked. Fortunately, the loss of two triodes does not affect the use. The delay is about 1 minute. The components are simple and easy to make, and the children don’t have to go to the toilet after turning off the lights!