cmer

I need to build a portable temperature data logger for a project I am doing for school, I will appriciate any help. Thanks in advance.

I need to build a flasher unit that controls a 220 volts halogen lamp. I have tried to look for some circuits on the net, but the only circuits that I found were only to drive either LEDs or normal lamps. Thanks for your help.

I need an LED flasher circuit. I need to connect 3 LEDs in series with a 5 volts supply. thanks.