All Questions
18 questions
0
votes
3
answers
58
views
How to not output any stage when 4017 clock in is off?
I have this following schematics I made:
When I switch off SW1 the sequence will stay on the last stage that was ON. how can I make all stages to be LOW when SW1 is Off?
0
votes
1
answer
61
views
Can't get 4017 led walker to work
For days I've tried to create a simple led walker using a 555 and 4017 IC, with a 9v battery.
My latest attempt was from the electronics for dummies book:
I'm not using these exact values, instead of ...
- 105
2
votes
3
answers
765
views
NE555 + CD4017 Airplane Strobe Light with LDR
Engineers! I have built a simple airplane strobe light using NE555 and CD4017 in order to flash two LED in a different pattern. I have added an LDR resistor with a transistor in order to switch OFF ...
- 31
0
votes
3
answers
4k
views
Replacement for CD4017 / IC sequencers
I'm building this circuit from the image below, which is an LED sequencer.
My problem is that where I am now I don't have a CD4017 to do the sequential, but I really need to make this circuit to ...
- 17
4
votes
1
answer
509
views
Light bulb lights up in a fraction of time (blinks) using TRIAC-BT136 and MOC3021 (Solved)
I have several days with problems when assembling the circuit of the image (it is a light bulb that turns on when you clap). To briefly describe the operation of the circuit, when the potentiometer is ...
- 41
2
votes
2
answers
180
views
How can I simulate an 8 LED (complemented) pattern device?
How can I simulate an 8 led with timer and ic?
I have tried simulating it like this but still it’s not working, it blinks for less than a second and then it turns off
I want it to work like First all ...
- 21
0
votes
1
answer
180
views
One time blink then turn off circuit
is it possible to change Circuit Diagram for the following example: http://www.redcircuits.com/Page146.htm or https://www.youtube.com/watch?v=mrxdiO1b29A
Original: 4 short flashes stay on light
...
0
votes
1
answer
838
views
3 simultaneous led chaser using only 555 and 4017
I've to design a circuit which consists of 30 LEDs in a row (RED, BLUE and GREEN) followed by a led matrix which spells out IN.
Conditions which I've to follow:
When the circuit is powered, ...
0
votes
2
answers
62
views
Electronic bell for lecture [closed]
please help me about this project. I want to make electronic bell. Which duration time is like
10.45 AM to 11.45 AM ..1st lecture
11.45 AM to 12.45 PM .. 2nd lecture
12.45 PM to 1.30 PM lunch break
...
- 9
3
votes
5
answers
13k
views
Simple Mosfet driver
I need to switch 8 IRF9540 (P-Channel Mosfets) with about 32kHz (so 1 MOSFET about 4kHz) so that only one is On at one time. I thought about using the decade counter 4017 for this, and the 555 Timer ...
- 154
4
votes
3
answers
2k
views
On-- off-- on-- off timer circuit
I want to make a circuit to do something that is relatively simple but I need to find the optimal way to do it in order to take as little current as possible. Here is what I want to do:
When a ...
- 49
1
vote
2
answers
607
views
With a 555 + 4017, how do I light 7 LEDs, then 6, then 5... then 1 then 0?
I'm in the process of turning a Raspberry Pi project into a simpler circuit board powered with 555 and 4017 chips.
I want to be able to start by showing 7 LEDs, then go to 6 then to 5 and so on until ...
- 21
1
vote
2
answers
1k
views
Baby 10 step sequencer help!
I'm a beginner in electronics and am working on a Baby10 step sequencer for a project. It consists of a 555 timer for a clock signal, a CD4017 decade counter and 2 more 555s for an Atari Punk Console ...
- 11
0
votes
1
answer
147
views
How do I get my 555's output to cycle through different paths with just one button?
I'm an amateur so this is a basic question.
I have a 555 in astable mode producing a frequency which I put through a speaker as a musical note ("musical" is debatable). I can get lots of different ...
- 561
1
vote
1
answer
1k
views
Traffic light circuit
There is a traffic light circuit that I have built shown above. It works on circuit wizard just as I want but when bread boarding both the astable and monostable work however my 4017 does not I have ...
- 11
1
vote
1
answer
2k
views
output waveform of CD4017 [closed]
We are trying to create a chaser circuit using a CD4017 counter with the output of a 555 timer as the CD4017's input. The schematic diagram used is here (photo taken from circuit digest):
When ...
- 11
1
vote
3
answers
1k
views
100 LED chaser with multiple LEDs on at the same time
I'm sure this has been covered but I am not finding answers to what I am looking for. Just getting back into electronics after well over a decade...so I'm a bit rusty. :)
What I need is a 100 LED ...
- 11
0
votes
2
answers
440
views
CD4017 Decade Counter Based LED Flasher Question
I am creating a simple LED Flasher with NE555 and CD4017. I am actually dividing the pulse frequency of NE555 by five. Because I have merged each pair of the output pins to finally get 5 outputs.
I ...
- 830