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Search: Posts Made By: EasyGoing1
Forum: General Electronics Technical Discussion 07-01-2022, 04:10 AM
Replies: 47
Views: 886
Posted By EasyGoing1
Re: BAUN - UVST - 0617,Can anybody Identify these Please?

My daughter lives in Barlaston ... moved out that way when she graduated high school 10 years ago ... got her masters degree in English Lit and creative writing. Has a nice career and a home she and...
Forum: General Electronics Technical Discussion 06-29-2022, 04:44 AM
Replies: 18
Views: 247
Posted By EasyGoing1
Re: Reading input and output of bridge rectifier on the same scope?

My cheap $125 Weller station has a fuse ... I haven't opened my newer one ... and I won't ... just to see if it has a fuse...

Also, here are both ground clips with boots off ... and the cable /...
Forum: General Electronics Technical Discussion 06-29-2022, 03:16 AM
Replies: 18
Views: 247
Posted By EasyGoing1
Re: Reading input and output of bridge rectifier on the same scope?

Honestly, the only reason I want to show the AC signal and the UNFILTERED rectified signal on the same screen is that I have a friend who is basically a metal forger, who is very intelligent but...
Forum: General Electronics Technical Discussion 06-28-2022, 08:42 PM
Replies: 18
Views: 247
Posted By EasyGoing1
Re: Reading input and output of bridge rectifier on the same scope?

The interesting thing is, that the probe wire (talking about the ground lead that's clipped onto the probe) wasn't even warm. The wire that it was clipped onto was just a thin breadboard jumper wire...
Forum: General Electronics Technical Discussion 06-28-2022, 08:24 PM
Replies: 18
Views: 247
Posted By EasyGoing1
Forum: General Electronics Technical Discussion 06-28-2022, 12:23 AM
Replies: 18
Views: 247
Posted By EasyGoing1
Re: Reading input and output of bridge rectifier on the same scope?

So basically, what I ended up doing by connecting the scope the way I did, was making this circuit...

https://i.imgur.com/6yd9jBy.png

Which means that for half of the AC cycle, I created a dead...
Forum: General Electronics Technical Discussion 06-28-2022, 12:09 AM
Replies: 18
Views: 247
Posted By EasyGoing1
Re: Reading input and output of bridge rectifier on the same scope?

That guy pissed me off once ... he did a video where he fried his Weller iron because he plugged it into 220 when it was rated for only 110... and in the beginning of the video, he fully admits that...
Forum: General Electronics Technical Discussion 06-26-2022, 12:52 AM
Replies: 18
Views: 247
Posted By EasyGoing1
Reading input and output of bridge rectifier on the same scope?

I have a 40 volt AC transformer that I put a bridge rectifier on, and I wanted to see the input signal and the output signal on the same screen on my scope, so I set one channel up with the test lead...
Forum: General Electronics Technical Discussion 06-01-2022, 06:07 PM
Replies: 13
Views: 337
Posted By EasyGoing1
Re: Ohms Law question - kind of ...

Look at the amp rating of the batteries I use for my vape...

https://i.imgur.com/rHCt8gY.png
Forum: General Electronics Technical Discussion 06-01-2022, 02:52 AM
Replies: 13
Views: 337
Posted By EasyGoing1
Re: Ohms Law question - kind of ...

esr?

And ohms law HAS to work here because ... being a LAW and all ... just need to figure out what I'm missing ... and Petes in CA mentioned internal resistance of the battery ... that might be...
Forum: General Electronics Technical Discussion 06-01-2022, 02:50 AM
Replies: 13
Views: 337
Posted By EasyGoing1
Re: Ohms Law question - kind of ...

I vape with a "controlled mod" - which is basically the circuit I described only it has a microcontroller and it varys the current through mosfets based on parameters you set.

HOWEVER, I...
Forum: General Electronics Technical Discussion 05-30-2022, 06:59 AM
Replies: 13
Views: 337
Posted By EasyGoing1
Ohms Law question - kind of ...

As most of you are well aware, the whole vaping thing has become fairly popular lately... I was having a discussion with someone in that realm who builds coils and the issue of current flowing...
Forum: General Electronics Technical Discussion 05-16-2022, 05:31 AM
Replies: 4
Views: 279
Posted By EasyGoing1
Re: Anyone know what this is?

So it's basically a crystal with caps already installed? Whats up with the MG ... I think if it would have said Mhz it would have been a dead giveaway .... and yes, it was a USB keyboard.
Forum: General Electronics Technical Discussion 05-15-2022, 06:40 AM
Replies: 6
Views: 271
Posted By EasyGoing1
Re: Power supply noisy with aggressive PWM

Aren't caps like the state of Texas? Go big or go home? ☺
Forum: General Electronics Technical Discussion 05-15-2022, 06:37 AM
Replies: 4
Views: 279
Posted By EasyGoing1
Anyone know what this is?

Pulled this out of a 20 year old Dell keyboard that gave up the ghost ... is this an inductor?

https://i.imgur.com/opvvBZG.jpg
Forum: General Electronics Technical Discussion 05-14-2022, 03:07 AM
Replies: 6
Views: 271
Posted By EasyGoing1
Re: Power supply noisy with aggressive PWM

Yes, it is a switching power supply - This one here (https://www.amazon.com/gp/product/B07SS77N7K)



That's a good idea... I'll try that.
Forum: General Electronics Technical Discussion 05-12-2022, 01:56 AM
Replies: 6
Views: 271
Posted By EasyGoing1
Power supply noisy with aggressive PWM

Hello,

I was reading an article ... or a blog or something about a student and his professor who designed a power supply that would over drive an LED with a .005 duty cycle ... it basically turned...
Forum: General Electronics Technical Discussion 05-12-2022, 01:41 AM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

I'm curious ... define "slow"...
Forum: General Electronics Technical Discussion 04-26-2022, 03:43 PM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

Yeah, but wouldn't the first "customer" in line simply empty the box?

:uzi:
Forum: General Electronics Technical Discussion 04-25-2022, 10:39 AM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

I don't really know ... a friend of mine asked me if I could make this so this is the proof of concept... you can unlock it with a UDP datagram with the word "open" in it ... WiFi-controlled lockbox....
Forum: General Electronics Technical Discussion 04-25-2022, 04:10 AM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

Pictures of final ... umm ... er.... "product" - if anyone's interested.

https://i.imgur.com/9tyw0IW.jpg

https://i.imgur.com/38zqtJa.png

https://i.imgur.com/INxsHA5.png
...
Forum: General Electronics Technical Discussion 04-25-2022, 12:37 AM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

So are you saying that this is the correct way to connect the diode, that WILL provide fly-back protection? Cause the way it looks to me, it will permit current to flow into the collector.
...
Forum: General Electronics Technical Discussion 04-24-2022, 06:27 PM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

OK, I was remembering incorrectly ...

THIS - DOES NOT WORK

https://i.imgur.com/BB3oxW5.png


But THIS DOES!

https://i.imgur.com/qUZOwAZ.png
Forum: General Electronics Technical Discussion 04-24-2022, 02:09 PM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

I literally tested at LEAST 4 different brand new diodes in both directions and I could not get the solenoid to actuate when the diode was in parallel with it.

And it's ok if the latch gets stuck...
Forum: General Electronics Technical Discussion 04-24-2022, 02:07 PM
Replies: 39
Views: 1,520
Posted By EasyGoing1
Re: TIP120 Question

I'll tell you what really upsets me throughout this project is the fact that I spent $30 on 4 stinking fuses for my Fluke ... WTF is going on that they can charge so much for some lousy fuses?
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