Recent content by Gianna

Hey guys Thank you all.. I'm stopping this project now. Will continue using a transformer when i can get my hands on one. Thanks again!

is there any way of removing the square wave?

but we cannot get rid of the zener?

The output waveform looks as if the bridge was only half wave rectified. I checked the diodes, they are fine.

I'm sorry the attchment is given here...

Help! I was trying to build an AC to DC power supply circuit without using transformers. I followed the circuit diagrams given online, which has the 240VAC connected to a resistor at the live and a full wave rectifier whose output was connected to a capacitor and a zener diode. The figure is...

I tried using a laser pointer to do that. It was about 600nm. But it was too focused to let me see any difference. Can u suggest any other light source?

Hello everyone, I want to focus IR on a small rectangular area using a Fresnel lens. I tried trial and error to find the focal point of the lens but can't seem to be able to get the exact point. The frensnel lens is a multiple fresnel lens. Can anyone please help? Thanks =)