555 timer

Hello. Im new here. I was thinking about making a 555 timer circuit, but im pretty inexperienced and dont know if using a 555 circuit as a switch will cause skin effect. When i think of skin effect i think of a regular household sinewave but i cant imagine what kind of wave would come out of the...

Hi Guys, So I've been trying to wire up a simple timer circuit on a breadboard. I'm a complete novice so I'm just following youtube Tutorials. I found this one video which shows how to do it but It's a little over simplified so I had to fill in a lot of the gaps which may be a source of...

I have a need to turn off a load after set duration like 3min(have used different value of Capacitor and resistor) I am using a NE555 IC and going ahead with designing as shown below, my application in breadboard is working but I'll to press switch each time the off timer is needed to activated...

Hello I have a pulse wave coming from the photo diode, with T(ON) = 50-60us, and total time period is approx 20ms. Since this is too short a period (T1) to be detectable I want to increase it to 5ms, keeping the total time period same, that means I want to multiply the duty cycle by 20 to 30...

Hi, Just finished doing my first proper schematic(*) and I'm worried that it's a bloated over engineered lump of components. What I'm trying to do is having 3 LEDs, powered by 2-3 AA batteries fade in and out. I've added a 4th LED which will be on when all 3 are off, I realize that could be...

Hi, I want to build an IR transmitter (~ 38kHz). My plan is to use a NE555 timer to generate the carrier wave (A-stable Operation), modulate it with a micro controller, and transmit modulated signal via IR LED. My question: Can I connect the micro controller output pin directly to the CONT...

Hi! Can you help me please? I don't understand why the circuit doesn't work, but it works when the output of timer 555 is also connected to the oscilloscope, although it's the same thing.

I have been working on a circuit to turn a motor on for several seconds, and then off for a longer period, using a 555 astable circuit. The on time needs to be around 5-10 seconds, and the off time needs to be about a minute. To get around the 50% duty cycle issue and allow for a longer off...

I want to make a pwm generator with variable frequency. I notice that the capacitor is charged through R1, but the discharge? I don't know with what formula the duty cycle can be calculated in this case. Thanks!

Hi. I'm trying to make a DPI display to work with my Raspberry Pi. First, I searched around and found out that the 555 timer IC is a good way to control the brightness of the display. And since the background LEDs needs around 23V to function, I've included a step up converter. It's for a LCD...

So I am having some trouble building the circuit I had built in a sim, several to be exact, which all seemed to work the way I wanted them to. Now that I have built the circuit on a board, Im not getting the results expected. Checked wiring and and parts, things look ok. Odds are I have missed...

Hi all, I would like to make a circuit that turns on my two front blinkers on my car permanently, and when the blinker is activated, the lamp should blink as normally. I have no experience in circuit designing, but i was thinking that maybe it's possible to use a transistor, mosfet or maybe a...

Hey, I'm new to electronics, and for one of my projects, I'm supposed to design an Ultrasonic Rangefinder using Analog components only! The components include the 555 timers, SN74HC chips (specifically the 4 bit counter), 7 segment display and etc. Most of the guides I have found online use an...

Hello. I just wanted to give a brief introduction of the type and purpose of my circuit. The circuit is designed to turn on (go high) for a time determined by 0.693R1C1 and do this (go low) periodically after a time determined by 0.693R2C2. I got this operational by using two diodes D1 and D2 on...

Okay, so recently got into breadboards and learning about electrical engineering and computers. And by recently I mean 3 days ago. I have an ne555p chip. I am trying to make an astable clock signa for my projects. lI have no way of showing a diagram. R1-2k R2-100k c1 10uf c2 10uf(across +...

hello, I need to generate 2 signals: a square wave of a pretty low frequency, say 10hz. Right now I'm using a 555 timer to generate the square wave. I also need another square wave 90 degrees out of phase. How can I do this? I've attached a picture of the signals I need. Thank you in advance.

I was just checking a data sheet for the MIC1555 (an IC similar to the NE555 timer), and came across the following circuit: I confess I find following such switching circuits a bit mind mending, but as far as I can see, surely this is at best about a voltage doubler: As the output on pin 5 only...

Hello! I am trying to design a car shade (the thing you put up in your windshield to block the sun) that is automatic with the press of a button. I have an idea of how it will work and the design, but I am struggling with the circuit. Here is some background: The automatic shade will be rolled...

I recently purchased a new 555 ic to generate digital clock pulse it work with +5v reference but not work with common ground reference. If you know whats going wrong please let me know.

I'm pretty inexperienced when it comes to electronics and circuits so bear with any stupid questions I may have. I'm working on a simple DIY project. It is essentially just a box and the high level idea is that when the box is closed, a circuit is completed where it then automatically executes...