Excellent video, my friend! I'd say this and your others videos about the 555 are among the best videos on this topic on RU-vid! You're very didatic! Thanks and congrats!
By far, the most detailed and clear explanation of a 555 circuit. Keep up the awesome work. Please do a detailed explanation of Microcontroller(ATMEGA328 to be precise) Timers and compare registers if possible.
Hi from Argentina ! Excellent explanation, excellent graphics, excellent video. Thank you to do an easy explanation for people who are interested in this. Hope you do more of this videos.
I am amazed that you do not have more subscribers! You're videos are very well put together, thank you so much. I would really appreciate if you could do one of your awesome videos on the bi-stable mode of a 555 timer, and thanks again
Thank you so much for your explanation. I have tried different versions of the monostable circuit, but none worked the way that you have shown. Great! Now I can move on with my project.
If you use this for a stairway light replace the switch with a LDR and an npn transistor.As soon as you open a door and the light hits the LDR the circuit will turn on for a predetermined time. Great video. thank you.
Really well produced and coherent videos. I like the Make: Electronics (Platt) book but actually these videos are better IMHO. Keep up the good work! Greetings from the UK.
You are definitely talented. Students would love you, because this is btec level one in UK. We had to do this, unfortunately back then I struggled. If only your video and youtube were around back in 1994.
I teach in this style because I had to sit through terrible university courses that were more about math and less about engineering with physical components. I hope these lessons help people who are going through similar difficulties.
Jason , video is awesome and well explained keep it up . I am in little trouble with 74LS95 4-bit shift register i am trying to use it as SIPO & SISO but i am trying to setup these on breadboard through button and led only (no external clock ) providing clock input with button manually so can you please do a little video specially on 74LS95 IC ( proteus simulation is running perfect but on hardware it is not doing anything ) explaining the whole setup and working .
Great explanation!!!..I created the similar circuit but there is a problem. The LED is ON by default when connected to power and switches OFF when the button is pressed and then switches ON after the time is up. Any suggestions??
This is great tutorial. So if I want to eliminate the momentary switch in order to only trigger the led once when power is applied to the entire circuit, how can I accomplish that?
I'm trying to learn electronics (and get my 12 yr old grandson interested) and this kind of step-by-step explanation of relatively simple circuits is extremely helpful. Thank you very much. What are the practical limits of the event duration using this circuit and just changing the resistor values? At some point I'm guessing that if the resistance is high enough that the capacitor would probably leak down faster than it can charge and the circuit would fail to work.
Good video. Since this is dc circuit. I want to use this 555 for a spot welding machine. Can I use it with a relay so the 555 Timer one the relay and the relay passes ac current through it to spot welder.
hi.nice video! can i conect IR receiver to this circuit(and where i need to connect?instead of push button?)i want to switch on the light with the remote and i want that light automaticlly off after 10 sec.Thanks for help
The problem I have is I have a trigger pulse from an infra red sensor and I want the state of the trigger to be ignored once it has triggered the timing circuit even if it goes beyond the length of the timing circuit, is this possible? . what is happening at the moment is the sensor is operating the trigger but because it is still pulling the trigger pin down to earth the output of the timer is permanently staying on after the timing circuit length until the trigger goes high again. Any help would be appreciated.
Question: I need to silence an audible alarm for 10 to 15 minutes. I have created a circuit that turns on a flashing LED and very high volume alarm. Once the operator notices the alarm I want a way to silence the very loud alarm audible portion only for a short time like 10 minutes. I had an off toggle switch but the operator would forget to fix problem or turn it back on after repair. I'm thinking a monostable timer would work. Question: 1 creating a veriable RC time constant for 10 to 15 minutes. Would that be practical and coast efficient? 2. Is this the best way? Or do you have another simpler solution? Note; the current circuit monitors two PLC outputs from two different systems. I create a circuit using 24vdc relays, Isocouplers to trigger alarm when the Line is running signal is High and the other devices ready signal goes low. The circuit works very well. I've been given the okay to make 4 more. Once I add the audible alarm reset. Due to time I need to keep it simple inexpensive I'm not a fully educated electrical engineer, I'm form Navy, advanced electronic schooling with 40 yrs experience. It's been a little bit since I've designed at component level. I'm having fun. Thank you.
Does anyone know how to make the trigger event automatic, as soon as it receives power? Without pushing a button and it just reoccurs over and over until the power is removed? I am thinking that a capacitor is needed in place of the resisitor (top left side)?
How can i build i circuit that uses three batteries? Each battery runs for 8 hour by giving power to a device. When the first battery runs for 8 hours then it switch to another battery.
NIce video!!! I know it is old, but I have one question: Is there a way to make a "retriggerable" 555 Monostable? For example, configure the 555 to stay on for 5 seconds when the switch is pressed, but if I press the switch again before it goes off, the 555 will stay on for another 5 seconds, without going off... in other words, I press the switch the first time, the 555 goes on, I wait for 2 seconds and press the switch again, then the 555 will stay on for 7 seconds total. Is that possible? What changes have to be made to your normal monostable circuit?
I'd say it depends. If you're trying to make a multiple circuits then you might want to go with another type of circuit. I'm not sure what values you'd need but it sounds like you'd need higher Resistance and Capacitance (higher resistor value and bigger capacitor), the resistor won't cost a lot but if you're going to need a really big cap like say 2000uf a decent one can cost a couple of bucks, not bad for one circuit but for multiple cost will rise a bit!
Sarah, you could measure the "actual" capacitance (since it has the greatest tolerance) and then calculate the value of the resistor and use 1% resistors. That would get you pretty close. Or use a potentiometer to dial it in and not worry about the capacitances exact value.
If I remember correctly it's about 7.3V. The datasheet tells you the drop based on the current being pulled and the amount of voltage being used as a source.
Gonna try and build a delay pulse circuit (a one shot) and use it to re-calibrate a digital speedometer, so that when bigger rims are used than the stock size, the speed will still be displayed accurately on the digital readout; hopefully.👍
Trying pin 5 to ground with a capacitor helps to prevent false triggering, just small enough to provide a microsecond buffer. This is not necessary for astable modes, but I see people doing it anyway, not knowing why! 😂(cargo culting)
