Tagged Questions
4
votes
3answers
70 views
Creating a Sequenced Array of 3 Mosfets with Adjustable Timings
I am comfortable with rudimentary 555 circuits and other basics, but I have something a little bit beyond me now.
I need to have three separate mosfets A, B, and C all turn on and off in sequence. I ...
0
votes
1answer
100 views
Testing a CD4018B
I would like to test a CD4018B IC.
I hooked up five LEDs to the Q1 to Q5 pins, Vdd to 5V and Vss to ground.
The five LEDs light up as soon as power is connected.
How can I advance the counter?
I put ...
2
votes
1answer
145 views
An IC that would combine a counter and a decoder
I have a circuit that makes uses of a decoder to command the latch line of 8 latches.
To avoid spurious latching that could occur in transitions, I disable the decoder output while I change the input ...
1
vote
5answers
2k views
alternative to 4017 decade counter for iterating over matrix columns
NOTE: I have made some changes since the original question, the number of columns is 114 not 45, this may affect some of the answers below.
I'm working on a project with a large LED matrix I'm ...
3
votes
1answer
429 views
4017 counter: Why do some LEDs have multiple connections in this traffic light circuit?
Schematic (from here):
Why are four legs connected to the green LED and two to the amber LED in the 4017 traffic light circuit? Shouldn't it be able to do with only one leg per LED?
