Problems with my school project Automatic ON OFF lamp using LDR and MOSFET

[kylie1023]

my transformerless power supply on the left side of the volt meter works just fine until i connect it to my load circuit on the right. the volt coming out just stays 1.5V at most and i cannot figure out why, please help thank you

 

[Harald Kapp]

School project? This type of "power supply" is absolutely not suitable for a school project.

Please do not use this so called "power supply" design. Although the voltage on the secondary is low, the whole circut is connected to mains and thus potentially lethal.

Throw away the power supply section and use a well insulated safe power supply, e.g. a USB wall wart. Or an adjustable wall wart for higher output voltage and power.

 

[Alec_t]

Welcome to maker.pro, but I agree with Harald.

i cannot figure out why

Because R10(?) prevents any significant current flow in the circuit.

What is the lamp rating?
Which MOSFET?
What are the LDR specs?

 

[bidrohini]

I agree with the first answer. I also suggest you check all the parts separately with DC voltage. See if all of them are functional.