Awesome, man
Worked perfectly. 3nF did the trick. No heating at all.
Good to know about this harmonics handling method (we all know how to get rid of noises, but some of us need a reminder sometimes)
Good to know about this SG3524 too. Although this capacitor trick is an elegant and cheap...
I gave up and migrated to PWM
It works good. Only two FETs totaled on the process (that's a win [dazed])
But as predicted, there is no such a thing as 0% duty cycle, so the light never goes off
There's 1% or something close, but no zero
Kudos to whoever solves this. No idea came out of me.
I...
"The part is rated for 0.6W, and you are attempting to to dump 2W into it?"
I didn't see that !
Or did not remember that controlling only the current was not enough
"Consider using a FET instead."
Heard FETs dissipate too much when working on a linear zone
The following would fix it:
"I...
Despite the risk of being cast back to school, I'll ask help on this dimmer circuit for a LED strip
I have:
- MJE13003 - http://www.onsemi.com/pub/Collateral/MJE13003-D.PDF
- 2N3904 - https://www.onsemi.com/pub/Collateral/2N3903-D.PDF
- 1k and 10k pots available
- Many resistors
This MJE...
>Big correction: it's around 31A (7kW)<
BTA41 is the triac currently present in the circuit I intend to rebuild.
I don't know if the triac is the faulty component, but if it is, an overtemperature might explain the defect. Followed by the spikes caused by the diac.
The good news is that it is...
I've been trying to explain the low peak voltage and found out that a series of factors lead to it, being the series resistor (even a small resistance reduces the voltage that much, depending on the arrangement), the capacitor (it has a resistance in AC, therefore producing a divider), and...
The following pictures are from a simulation. The result/values are very close to reality.
(Excelent and lightweight simulator, by the way: EveryCircuit)
This first picture here is the ideal: Works well from cutoff (not depicted) to span (as represented).
But you can see the current...
Yep. Loudspeaker is the subject [lol]
Blame it on regionalism...
But I've learned a lesson here: I can cheat a similator, not real life
My "infinte resistor" approach that I used on the RC calculator demands in real life a huge capacitor
Let's try your LC idea now. Makes more sense
220V
Availability is the problem
I live in a small town of a sh!t country, and it takes 40 fold or more the price of the pot to ship one of these
I could accomodate a bigger pot, but it would be a lot of plastic breaking and glueing
But was it 1M ohm, wouldn't it suffer the same problem (high...
I need to design a dimmer, but I'm having a problem with the potentiometer, that heats up too much
It's 150k, and it's practically impossible to get a different one
The same problem goes to the diac/zeners: also difficult to get a different one. Right now I'm using the DB3 diac, that conducts...
"There are many (2-way) speaker designs where the only cross-over is that the tweeter has a series capacitor."
That's what I thought. It makes all the sense.
I have no documentation at all. All the components I have been scavenging. The box I'm doing myself
This small speaker is one of those...
I need to make a High pass filter for a twitter (allowing 1kHz or more)
I thought about putting a capacitor in series, but been reading that it needs a resistor too
None of the answers have convinced me of why
Plus, a resistor across (?after or before the capacitor?) will (?) reduce the...
Relay it is, then
[cry]
The volume that comes from the devices are already low IMO, cannot lower it more.
I was thinking about economy and lifespan, but no problem: The relay will stay the very most of the time in one position anyway
Good to know about this FET to ground option. Learned a...
Thank you MacGyver
A specific chip like that is my dream, but far out of reach right now. Hardly accessible/findable in my country.
Now, Skogsgurra's solution seems the ideal solution for the moment, but I have a question about this arrange:
Won't muting a source (grounding it) also mute the...
I'd like to toggle between two sources of stereo audio (each having L, R and Neutral). Who can help ?
I'd also like to do that using one of those basic bistable on/off switches
(https://i.stack.imgur.com/N0LfN.gif)
- And more important, if possible: basic components only. No extra ICs apart...
I'm putting thoughts on heating the thing. Not only because of the ripples, but to reduce stresses and ease the bending.
Thanks for the tip
And thank berkshire for the clarification. I've seen other videos where the only welding is on the beginning. Those wheels looked good enough
Thank you both
That book is probably the most adequate so far. Very specific
By berkshire's video I could count maybe two wheels per minute. Our market here absorbs 2 wheels per hour [tongue]. For that reason, the machine must be economical (a single pass, low production)
I can see that the...
Thank you all
I enjoy the idea offered by many here of calculating multiple simple bending stresses. That's probably what I'll do. My only fear is that the overall shape, which is full of curves, might interfere on each individual calculations. After all, if I don't neglect the radius of the...
