Thanks for explaining how it works. This circuit consumes 3x less power then regular astable mode (at least for my unit) If add diode and potentiometer yotu can make very clean PWM signal with stable frequency and onyl control duty cycle.

So another video recommends using a capacitor for this (no R), and another video says just use a diode. What's the difference? These were both limiting flyback sparking or spikes when starting / stopping a motor using a transistor.

I'm watching Your KZbin videos with enjoyment. I too have a Lathe Boxford AUD and I need an information from You. I want to make some Metric Screw and I know I need a Gear 127/100. Please, if you have such a gear, could you tell me the millimetric dimensions of that gear ,I want to make them myself .tnx

O, stop whining ! You misunderstood the assembler userguide and I doubt you are a programmer. PSECT intr_vars,CLASS=BANK1,space=1,delta=1,noexec dummy_a: DB 0h .... PSECT int_vectors,abs,Ovrld,delta=2 ORG 0h res_vect: goto init ORG 4h int_vect: ; save context movwf w_temp&07Fh ....

It is very good video. I want to mention that the capacitor stores energy at 12V instead of 50V used in the calculation of the capacitor size.

Super helpful video - I was struggling to understand how these work and I realized in the course of the video that I had a single misunderstanding that was throwing me off. That was thanks to your clear explanation!

Thanks for such a great explanation of this subject. And I think you have given me a clue as to why believe I have blown a couple of 555s. I wondered if you can help fix what I think is the issue? I’m aiming to trigger a pair of 555s in monostable mode with a rising edge triggers to drive Mosfets which in turn drive an actuator open / close. The external input is a temperature control unit that produces 12v output for so long as actual temp is above set point; otherwise output falls to 0v; and for one of the 555 circuits, this output is inverted to give the desired reversal action. I’ve adapted a circuit published elsewhere to create just one part of a larger project, and would have attached the circuit at issue here in pretty much the same form as the circuit you demonstrated - if I could find a way to post a pic of my circuit, you’d see my differences to yours in yellow…! So to describe, my rising edge section is very similar to yours except: - the switch (in my case - the TCU) is located between R2 and +ve rail - Pin 4 is connected between the switch and R2 (so if the actuator is commanded to reverse, the active 555 resets, and the other becomes active) - I have a pull down resistor from between the switch and R2, to ground. BUT I did not include a clamping diode when I first tested the circuit, as I wasn’t aware of the overshot issue until zi saw your work. And essentially my circuit did not work and after a lot of mucking around, the 555s are not even operating after removing the rising edge sections. I think they are blown as the voltage overshoot would likely have gone to around 26v with my 13v power supply. That I think would have blown the 555s? Correct? So based on your reference to this, I figure I must add a diode. I’m thinking of adding a 1N4742 12v zener diode across Vcc to Pin 2 on each my 555s. Is this correct, or should I add these across Ground to Pin 2. Would really appreciate your thoughts Many thanks John

precise..well done

its a really nice saw . Thanks

A quality bit of kit, used one of these for over 40yrs and its still going strong 👍

Nice. I got a knife I made from an old hacksaw blade from a similar saw. I think it was a thing us apprentices did as old blades were always sought after!

Old machines are beautiful to behold.

Why did it arc like that

Do you have to put the A3 or each last part on the right?

ez finals thanks to you

Did you connect the scope and sig gen directly in parallel with the tuned circuit ?

Where in U.K. can I buy a 0.1 micro F capacitor with 2M ohm resistor as a single unit with two leads . I need it for my vintage sewing machine foot controller/ speed controller. Would appreciate your feedback ASAP. Thanks.

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Hi, in this case would R2 when calculating frequency be 0?

The video was indeed clear and well presented. Thank you very much.

Astonishing explanation, thank you!

This explanation works. Thx

I got confused watching the video. The I read the comment section and read so many people failed their exams because of this video. Just wow.

thanks:)

hey can you do the same with male to female wires and then to a bread board

Thank you :)

Excellent

Nicely done - I'll be showing this to my grandkids

Perfect! Never soldered a diode before and this video worked! Thanks!

nice video thank you

A great video on how the electric motor works I have learnt so much thank you having owned myford lathes since the 90's which use these motors

Helpful

Thank you

thanks

isnt it 8 bits for a character?

just the answer I was looking for. Ta

Best explanation

Very nice.

Absolutely stellar explanations and demonstrations. I'm finally starting to understand! Thank you so much. (ps You used the term "mutual" at one point and I take it that it's the same as "common" - I love it.)

Thank yo for taking time to produce this video. I have been exploring using a 556 setup with the first side creating approximately 24KHz. That triggering the second side as a mono-stable creating a pulse that is variable between 20% and 80% of the 41 micro second wave. I will certainly attempt to apply your theory. However in all humbleness allow me to give some feed back. The video portion is clear, but the audio portion is quite distorted suck as you would find in a musical effect called "phasing or flanging". Some of us deaf old farts up here in the US find that and the accent as a reason to squint our ears : ) IE. It was hard to understand you. I still say thanks for the video just the same.

Best and easy to understand video on this topic i have found so far! Thank you! Would be great to also do an overview of typical anti-sparc measures to protect semiconductors like transistors/mosfets when switching DC with inductors. What about fast flyback-diodes versus RC-snubber? What about varistors and TVS suppressor diodes? What are the optimal measures to protect a mosfet? Can you combine these methods for better results?

I just have a question about the decoding part, how do we identify the code without the spaces ?

hello there, any suggestions on lubricating the gears? i stupidly used oil and now the oil has dripped down the quill and splashes all around when the spindle turns fast (my t shirts now have a horizontal oil line on the chest area😂)… should i reopen it up , remove the oil and use grease instead? thx

Frequency?

thx you mate you saved me A LOT OF TIME liked the video

I guess the smaller should be on the left ?

love the bgm, sounds like a classic 90s porn

What gauge is the wire you are using for mini

Great video, is there anyway for this to work with 4 LEDs?

If I have 12 v supply and want to put 12 led’s of 2V each what resistance I will need? Or 12v supply is to small?