Friends, I have 4x4 led arrays. At one time 4 leds can be lighted and at another time it may be 8 or even 12. This I am doing with a help of software and pcb. Say like Letters displaying in an led panel.
I have 100Watts bulb (220v AC power supply) on the other side. I want to light these 100W bulbs as according to the LED panel. If 4 leds glow, the corresponding 100W bulbs must glow. If 12 leds glow, the corresponding 100w bulbs must glow.
Please give me some idea.
I worked with 3v dc relay switches. But in vain. I am not getting above 1.5v dc in the led panel. I have searched for 1.5v dc relay, but is not available (only SSR's are available, which is costly)
Can I use a transistor. Please help me. Thanks.