All Questions
Tagged with pulse integrated-circuit
19
questions
0
votes
1
answer
45
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IC 4017 output modification to pulse when released button?
Normally working with 3 output LED,
when press button in first time LED1 on LED2 and LED3 off
then released button in first time LED1 still on LED2 and LED3 still off.
When press button in secend ...
- 1
2
votes
2
answers
224
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How can I generate square pulses of the format shown in picture? The positive part should have smaller time scale
How can I generate pulses of this format? I need to generate a single pulse of 20V as a trigger pulse for performing a microscopy experiment( I couldn't manage to get a programmable function generator ...
- 31
0
votes
0
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23
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Time-adjustable pulsed power debug tool
For debugging DC thermal failures, I'd like to be able to limit power duration to be roughly in the range of 1ms to 5000ms, adjustably. Here is one obvious way to do this:
You can assume that I have ...
- 554
0
votes
2
answers
361
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How can I shorten the width of a pulse?
I am exploring ways to shorten the width of the ON-time of a PWM signal while keeping the switching frequency constant. I intend to use S1 as the signal to the Enable/Disable pin of a gate driver IC ...
- 29
0
votes
1
answer
101
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Slow down a pulse (like 12hz / 3 to a 4hz output) [closed]
I am trying to output a slower pulse than is inputted into this mystery IC or circuit. This input pulse is digital and lasts for 1/10 of a second. Is there a chip that would allow me to proportionally ...
0
votes
1
answer
67
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How does a "pulse dialer" (e.g. IN9151) internally work?
I'm wondering how a so called "pulse dialer" like the IN9151 (https://www.digchip.com/datasheets/parts/datasheet/237/IL9151-3N-pdf.php) internally works, meaning how it is achieved to ...
- 175
0
votes
1
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61
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How to find the exact value of K for SN54LS123
I have a circuit containing SN54LS123 (Datasheet) IC. I want to know the output pulse width but unable to figure out the value of K.
The formula is PW = K * R * C.
The values of K is given in the ...
- 73
0
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0
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43
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Arduino Pulse Generation
I have a Arduino sketch that can rotate 2 stepper motor using a stepper driver that has 256 micro stepping.
I used Arduino MEGA timer 1 and timer 3 with fCLK/8 prescaller for generating step pulse ...
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0
votes
1
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385
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Pulse width stretching of the 0 pulse with a constant T [closed]
I have a digital output with varying pulse sizes and I want to design an IC to stretch the 0 output for a constant T+ "0" pulse time (as in attached picture).
I have tried using a monostable ...
13
votes
1
answer
7k
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Why does this rising edge detector using a capacitor and a resistor work?
So in this video from Ben Eater he makes a rising edge detector using a capacitor and a resistor like the one below.
simulate this circuit – Schematic created using CircuitLab
In the video Ben ...
- 233
1
vote
2
answers
1k
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Long (500ms) Pulse Extender
I have an SPST momentary tactile switch and want the pulse, whatever length, to be extended to 500ms (unless of course the button is pressed for longer than 500ms but we can ignore that if we hold the ...
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-1
votes
3
answers
353
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Building a device to reduce pulse frequency by a variable amount
A speed sensor on the wheel of a mini motorcycle sends pulses as the wheel rotates. It may send 1, 2 or 4 pulses per tire revolution, so let's say that at top speed, it may have 10, 20 or as many as ...
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-6
votes
1
answer
112
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Wake me at 6 AM, respecting daylight savings and time-zone. Possible? [closed]
I'm an electronics noob.
I want to be woken up at 6 AM every morning (irrespective of daylight savings, irrespective of time-zone) by a device which has no visual display, no wires, and works forever....
2
votes
2
answers
1k
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Darlington Transistor functionality
After looking at the schematic for this particular darlington transistor (see picture pasted below) I had some questions about basic functionality.
First, the diode at the top right of the picture ...
- 53
1
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10
answers
7k
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How do I produce a 1Hz clock output using a 555 timer IC? Are there better ways other than a 555 timer IC?
I've been messing up with timer ICs, looked up on how they work and now I want to design a simple digital clock using a 1Hz pulse generator. Is a 555 timer IC sufficient enough to make accurate 1Hz ...
- 727