Search found 1562 matches

by CeaSaR
Thu Sep 26, 2019 8:29 am
Forum: General Discussion
Topic: Self entertaining, entertainment system!
Replies: 29
Views: 3562

Re: Self entertaining, entertainment system!

Sounds like a poor design or actual design flaw with said remote. What brand was it, if I may ask?
by CeaSaR
Wed Sep 25, 2019 5:31 pm
Forum: General Discussion
Topic: Self entertaining, entertainment system!
Replies: 29
Views: 3562

Re: Self entertaining, entertainment system!

The thing with the Cell ping is that it usually only affects poorly shielded input cables nearby. If the ping would cause interference of the kind that is intimated, there would be serious problems with their FCC compliance, moreso with the TV than the phone. The standard cell ping has been around f...
by CeaSaR
Wed Sep 18, 2019 8:31 pm
Forum: General Discussion
Topic: Voltage spike
Replies: 9
Views: 512

Re: Voltage spike

You've got AC and an almost direct line from the transformer to the base(s) of the Darlington transistors. When you remove power from the transformer, the collapsing magnetic field(s) can cause a large inductive spike depending where it is on the waveform. If it is at the top of the waveform instead...
by CeaSaR
Tue Sep 17, 2019 6:29 pm
Forum: General Discussion
Topic: Voltage spike
Replies: 9
Views: 512

Re: Voltage spike

From your description, it sounds like a home-brew power supply. Would you be able to provide at least a partial schematic of the transformer to the initial output stage of the PS? If commercial, a make and model would be helpful. Kind of a shot in the dark without some info, though I have an inkling...
by CeaSaR
Mon Sep 16, 2019 6:40 pm
Forum: General Discussion
Topic: Can anyone help this fellow experimenter?
Replies: 2
Views: 278

Re: Can anyone help this fellow experimenter?

Here's the guy's question: ****** James Analytic 2 days ago Great write up. I was wondering about the current waveform and using an inductor say for higher current applications like welding in the same way the capacitor is used. Is there a similar formula like how the capacitor is used to filter and...
by CeaSaR
Sun Sep 08, 2019 6:38 am
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 95
Views: 15033

Re: Odd Commercial Products.........

At first I thought you meant Muzo, but it's yet another one.
Here's a review of Muzo: https://youtu.be/MCW5HUkrr-o

At least the moles and gophers won't be in their walls.
https://www.cleanairgardening.com/solar ... repellent/

CeaSaR
by CeaSaR
Mon Aug 12, 2019 8:34 am
Forum: General Discussion
Topic: I can't think today.. help !
Replies: 10
Views: 3229

Re: I can't think today.. help !

Yep, but it retains some resistance to ground because the LED resistor stays in circuit to prevent overloading the output. Since the signal to turn on is taken from the next step up, it'll turn the lower one off, and as the voltage increases, the lower outputs stay active, continuing to shunt the LE...
by CeaSaR
Sun Aug 11, 2019 9:08 pm
Forum: Computer Programming
Topic: server fan diagram
Replies: 5
Views: 1407

Re: server fan diagram

Only thing I can find is via Digikey:
https://www.digikey.com/product-detail/ ... -ND/665856
by CeaSaR
Fri Aug 09, 2019 4:27 pm
Forum: General Discussion
Topic: I can't think today.. help !
Replies: 10
Views: 3229

Re: I can't think today.. help !

Go back to the "ok, new project time" thread ( https://forum.nutsvolts.com/viewtopic.php?f=45&t=17714 ) and look at the LM 324 circuit. Just use 1/2 of the shown circuit, but insert a NPN transistor and possibly a resistor as a switched path to ground, effectively grounding the input to the led. Her...
by CeaSaR
Fri Jun 14, 2019 7:44 pm
Forum: General Discussion
Topic: Mini amp circuit
Replies: 147
Views: 234521

Re: Mini amp circuit

It's based on the old style Quasi-Complentary AB amps of old when high power PNP transistors were rare. Yes, I could use lovely modern units and not go that route, but, nostalgia, ya know. It all works out in the end.

I was just trying to figure out why it looked like that.
by CeaSaR
Fri Jun 14, 2019 6:14 am
Forum: General Discussion
Topic: Mini amp circuit
Replies: 147
Views: 234521

Re: Mini amp circuit

I think I see why I get that reading. Mostly they are used with a split power supply and a GND point between them. Thus, in this particular case, the negative transistor (PNP) never really has the chance to go more negative than the ground reference point.
by CeaSaR
Thu Jun 13, 2019 6:34 pm
Forum: General Discussion
Topic: Mini amp circuit
Replies: 147
Views: 234521

Re: Mini amp circuit

Well, it's ten years later and I have a question about this and many other very similar circuits. Being that this type of circuit is class AB, wherein the B section is supposed to split the amplified signal in half, with each respective transistor amplifying their respective polarity of the wave for...
by CeaSaR
Fri Jun 07, 2019 6:41 pm
Forum: Computer Programming
Topic: Router issue ( boot loop ) keeps resetting.
Replies: 7
Views: 1792

Re: Router issue ( boot loop ) keeps resetting.

What's the TIMEOUT set to? It may need to be increased. Were there any updates that may have caused the problem? For all you know, it may be on your internet provider's end in that they may not be 100% compatible with your router. My Story: Way back when my kids were in school, we were not happy wit...
by CeaSaR
Wed Jun 05, 2019 8:06 pm
Forum: General Discussion
Topic: Something Wrong with Coupling Capacitor
Replies: 10
Views: 5516

Re: Something Wrong with Coupling Capacitor

These boards are designed to basically be "plug and play" and should work right out of the box. Are you trying to use it in a manner that is not described in the included paperwork? Again, is there a schematic or at least a link to the board you have purchased? Just how are you going to use the boar...
by CeaSaR
Wed Jun 05, 2019 6:45 pm
Forum: Computer Programming
Topic: Router issue ( boot loop ) keeps resetting.
Replies: 7
Views: 1792

Re: Router issue ( boot loop ) keeps resetting.

I see you can use the old router just fine, so it's not necessarily the Internet connection. (That's another story that I think I told a long while back) Did you try to connect to the Amped router with other devices to rule out the main connected device? Can you connect to the Amped device without i...