555 Timer Output Stage 

Really like how clear and understandable you make this. I'll definitely be keeping an eye out for more videos!

Oh man RIGHT when I was wondering "Well what is the current rating for the output on this tiny chip?" you went right into using the transistor on the output. Stellar tutorial!

I've seen circuits on using a 555 timer to drive a Mosfet, which creates an oscillation for a Tesla coil circuit, making it a solid state tesla coil. You can even use the potentiometer to control the length of the lightning coming out

A long time ago, but thanks for the clarity of explanations--beautiful!

Dude, Your the best.That made so much sense. Thank you so much.

best explanation. Thank you soooooooooooooooooooooooooooooooooooooooooooooooooo much skinny R&D!!!!!!!!!!!!

really dig & understand the way you explain things - it makes it all so easy. eagerly awaiting your 3rd part!

Best you tuber ever

Well explained - thanks a lot!

Really clear step by step instructions and explanations, good teaching methods, thank you and keep it up :-)

Great video. Wonderful approach to teaching

"Thank You", thank you very much.

Thank You for helping me understand my world..

You are an amazing teacher.

This tutorial is very helpful thanks you, I'm waiting for more tutorials :)

I like your clear explanation and being a conscientious observer found the '555' name origin interesting also. Because I first discovered the 555 timer to great delight when I was looking to build a comparator circuit to run an automobile alarm I was designing in 2004, which worked perfectly for that application ... and more recently decided on using it in conjunction with a thermo-resistor [... in place of your 'Rb' resistor] ... and in that way control the firing of a discharge capacitor into a magnetic field generating coil which runs my 'Come-No-Go' DC motor, to circumvent 'dead-stop-starts' from burning up my field coils. This motor is projected to be upwards of 500% more energy efficient than any in use today, because it recovers 40% of it's 'input power' invested in powering a magnetic field generating coil which reverses 'one of the three' ... field magnets from 'South Pole' to a 'North Pole, attracting one of the four the south pole faces on the armature. As rotation to 'face-to-face' occurs for these two magnets the coil on the field has gone neutral and so now the magnetic field washes over the first disconnected and then reconnected coil [through a bridge rectifier] ... 'it' now generates a 'reverse EMF that is expected to equal the 40% 're-covered' input power. This design overcomes the fault of 'dumping electrons' which the present design of DC motors strand in 'disconnected coils' in the running of the motor ... meanwhile the C-N-G design recovers them. Message me to know more about it.

"Thank You", thank you very much... 😎

You Great Teacher...

excellent video, helped me out big time.

Power a coil, like I did. Got help from your video.

Is there any way you can emulate the 2015 Mustang's sequential tail lights using two 555 timers and a switch???

Are you able to make a video on a simple 555 timer circuit? Where it flashes a single led with a potentiometer to adjust the speed of the led blink rate. Or a dual led circuit with two adjustable potentiometers.

An excellent intro for someone (me!) taking his first steps. Can you state what units you are using in your calculations, i.e Farads, micro/pico etc., K-ohms, etc. I could probably work it out, but am short of time. Thanks.

Thank you for you explanation but i have a question, i want to use the output stage as control mechanism to connect to optoisolator but my project seems like the current and voltage is too low to trigger the moc3021? Do i have to use a bigger npn transistor?

I like your vids, I watched your 555 series, you are explaining stuff in very clear and concise way. As a beginner in electronics, I'm thinking of building delayed on circuit with MOSFET. If I wanted delayed off, I presume I would just reference gate to ground with pull down resistor and add capacitor in parallel. To make delay-on, the simple way would be to use 555 timer in monostable mode I guess? Btw, I'd like to avoid any fade-in effects. Do you plan making any vids about that?

can you use the 555 as a clock for a microController? in otherwords instead of connecting a crystal or some sort of oscillator

i make my own colloidal silver and i use 27 volts from 3 9 v battery together for 3 min. sometime i forget and leave it too long ergo the silver water is no good.is there a way i can use a 555 timer to cut off after 3or4 mim?

Fantastic... Thanks.

Hi! I just wanna ask about the values of resistors and capacitors?

When the output is low does the system still draws power from the source?

Did you end up making the 3rd part with how to choose the resistors and capacitors?

Hello Shinny R&D will they work as a single shot push button power device in conjunction with mosfet to power dc motors. Button push motor runs, release and motor stops. kinda new to all this but getting there slowy. with help from these videos. keep up the good work P.S - are you going to work with op-amp soon.

Question!!! Lol, you show pin 3 going "hot" to run the gate on an NPN... Can pin 3 going "cold" trigger a PNP alone? I assume it must, but am wrong often enough to ask, lol. Now, assuming a "yes", can an NPN and a PNP be gated alternately on 3 to produce high current potential pulses before load when 3 is grounded (PNP), and post load ground switching when it goes high (NPN)? Kind of a freq lock on 2 channels?

the internal explanation of the timer was just what I was looking for as a noob

These videos are invaluable to me. Please, can you make more videos about basic ICs like Op amps etc. Thank you very much.

thanks

what effect does duty cycle and frequency have on the output from a transformer. with a pwm input? will a longer duty boost output? or a boost in hz give a greater output voltage. also I need to boost the output as battery volts are depleted. to maintain a fixed output. like I said before I am very new to this. I only met the Tran sisters about 8-10 months ago! I heard of them but didn't know what they really did. besides make radios! thanks for another awesome video. hope you never stop. if you ever do a video on everything. Just start over and please! thanks

thanks sir very well explained and we like your videos and shared this video with my frnds tooo

Nicely presented

very interesting

Great vid. If you please I would like an explanation on how to delay pin 3 output by a certain amaount of time.

This is the best series ever for the most important IC ever !! Thank you so much man but one thing I do not understand is why 1.7 V ? The voltage of the output is very important so I really need to understand how to control it. I think you said something like its always like this

Excellent filling in some gaps and lost info for me just now

Very nicely put. Only thing I'm a little confused about is at 3:39 you say that there is a difference of 1.7 volts between the ic and the 9v supply. How come the voltages doesn't add up? Is it because the 9v battery will always have 9v between it's poles? What happens if you add more voltage then what the battery is rated for?

Well done, Mr., thank you! I have to ask you: in a NE555DR circuit based the power limitation is the CI limitation ( 200mA, 5 - 15V), no matter which NPN transistor you use to switch ON/OFF the load, is that correct? I mean, using a single power supply to both, CI PWM controller + load.

how to connect with sensor

can I just ask why you not doing the example on the breadboard instead of paper? just saying this because i did this from paper but it only works with a 10uf capacitor and relatively should blink more or less with different capacitor...what it does for me is that when changing capacitor, it stops blinking, just stays on...now tryed with bigger and smaller than the 10uf and no change? any advice ? many thanks

you promised to post a video of value of Ra and Rb of 555 timer

Fantastic explanations these are awesome so easy to under stand THANKS Now for a question How would you go about having an led blink twice then a different one blink twice then back to the original one and repeat similar to a navigational light system on an airplane wing I have a couple of 555's and a couple of 556's also

Can u explain to me how to make a circuit that will turn a a servo motor slow using a 555 timer

Hi... Just a quick question regarding Pin 5. In part 1 of this video you noted to add a Capacitor at Pin 5 you did not note (that I noticed) what size of capacitor one should use for this pin. Thank you for your innovative instruction, it makes learning; understanding and retaining the of the data much easier. Thanks again keep up the great videos.

Hi, this is tronics again! Please forget my earlier question, as I've sorted it myself, having read your later video on the math. One comment - presumably you measure your actual output frquency with an oscilloscope I guess that most people won't have one of those. Any other way?

Sir! What capacitor and resistor values i will buy? Is it based on the incoming voltage from the battery or based on the voltage needed by the LEDs?

You said that in your project you used the version with the transistor, but how do you keep the ground from the 555 circuit from interfering with the separate circuit? As far as I saw, you only used one battery. Is it possible to power a 12 volt laser, and the 555 timer on one battery? Maybe you could release the schematic for your project. Thanks!

i already asked this the last year xD but i forgot why the number 1.44 exactly? one more thing can you show me how to use the 555 timr to convert a normal motor into a servo?

well I'm back again with another idea if you want . How would you go about creating a sound generator using a 555 timer I want to make it sound like a machine gun for an rc war plane

What am I missing? 100mA is plenty to turn on the LED's. Just use pin 3 of the 555 and limit the current with a resistor. You don't need any external circuitry! I have done this for many years with all sorts of loads requiring currents much greater than LED's!

can you explain whats the difference between a linear IC and a digital IC?

what happens when the capacitor = 2/3 of V+ ? does it produces a 1 or 0 in pin 6?

Great work! But it would have been more precise to say that it sources current (emitter current = collector current + base current) in the BJT case, nevertheless, it doesn't sink current at any rate .. otherwise, you will have to use a MOSFET transistor to completely "isolate" the 555 from the terminal circuit .. anyway, that was just a note .. keep it up any many thanks :)

why it's skinny R&D while you speak about healthy and clear R&D?

वैरी गुड्ड।

i was expecting much more

my 555 burning with 9v dc

Ur cute