I need a simple circuit that can light up LED's one by one. Once the next led is lit up the previous one switches off. Use of micro controller would be difficult cause I'll be using at least 200 LEDs.
Thanks in advance
I need a simple circuit that can light up LED's one by one. Once the next led is lit up the previous one switches off. Use of micro controller would be difficult cause I'll be using at least 200 LEDs.
Thanks in advance
It'll take at least 7 micro controllers. Programming each would get more complicated. I'm currently planning to use 4 to 16 decoders with 555 timers, but the counter isn't counting. I'm using T74LS93.
I'd do a row-column diode decoder matrix where the LED itself is the cross-point diode. 16 rows and ~14 columns would do it. Use two 4in to 1 of 16 decoders, two 4 bit counters, and a clock oscillator.
I need a simple circuit that can light up LED's one by one. Once the next led is lit up the previous one switches off. Use of micro controller would be difficult cause I'll be using at least 200 LEDs.
Thanks in advance
I've tried with an 8051. I've used the basic circuit and I'm attaching the program. I didn't make the matrix but connected leds to the port.They didn't glow. What I'm I doing wrong?
I've tried keil and the ports do go in the order required.
I've tried with an 8051. I've used the basic circuit and I'm attaching the program. I didn't make the matrix but connected leds to the port.They didn't glow. What I'm I doing wrong?
I've tried keil and the ports do go in the order required.