...... except for the LED supply.You have the battery backwards.
I don't think that's how the OP intended for the circuit to operate. With a reversed battery, the counter will look like a diode across the battery....... except for the LED supply.
Is the timer working?I turned the poles of battery backwards but it still doesn't work.
No, I did not know it is only a simulation. My LTspice schematic is not covered with the grid on your schematic. Your 555 is powered (backwards) and has power pins but the 4017 is not and does not.Mr. Guru, you do know that's a sim...right?
In an actual circuit I wouldn't recommend using a single resistor to limit the LEDs, with open collector outputs...ok...but not with CMOS outputs.
In this case it's okay because only one output will be HIGH for each count.In an actual circuit I wouldn't recommend using a single resistor to limit the LEDs, with open collector outputs...ok...but not with CMOS outputs.
I don't know the program you are using but I think you have to have a ground somewhere for the simulation to work(?)Hi. I just want to prepare a led roulette circuit. I set it on some programs to make sure it works correct. But it doesn't work at all. What's wrong with it? Looks like it should work shouldn't it?
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Agree. Even though all visible return paths are connected explicitly, there still need to be Vcc and GND named nets for the phantom connections to logic chips that have power pins suppressed.I don't know the program you are using but I think you have to have a ground somewhere for the simulation to work(?)
Must be some cheap Chinese LEDs.I have had LEDs reverse-biased by only 3V actually lighting and needed a series diode to stop the lighting.
by Aaron Carman
by Aaron Carman
by Don Wilcher
by Aaron Carman