« first day (3073 days earlier)      last day (2161 days later) » 

Mikhail
Mikhail
06:29
Want to buy some DC/DC buck converters to go from 12V to 5V but I can't find a reliable item. Was thinking of this guy. Reviews look suspicious, what do you folks think? amazon.com/gp/product/B01ENT1O62/…
 
8 hours later…
W5VO
W5VO
14:02
Digikey has a pretty good selection
but be really wary about what you buy on amazon/ebay - A lot sellers take advantage of sealed electronics that are difficult to inspect
Marla
Marla
14:56
@ThePhoton . . . There are a couple of people who ask questions and I just sit back amused. Because I have seen them ask before. No matter what is suggested, they argue or say that they cannot use whatever is suggested.
It makes me think that in doing their refusal, that later on they can come up with the idea themselves and self congratulate that they are creative.
 
2 hours later…
Eggi
Eggi
16:35
Hi guys,
I need to design a fixed voltage drop which should be controllable with a µC.
The load where I want to enable/disable the voltage drop is capacitive and the voltage is about 130V. So no programable poti for me.
Do you have an idea?
I thought about diodes, I saw some circuits with thyristors for AC control and resistive load, but I am not too sure if it fits my application.
I have to add, 2 Amps over 2µs
Marla
Marla
@Eggi . . saturable core reactor?
 
3 hours later…
W5VO
W5VO
20:02
@Marla Or the corollary: "I knew it was impossible"
@Eggi Are you trying to drive a high side MOSFET? Because that sounds like a round-about way of describing that.
laptop2d
laptop2d
20:30
I want a PCB made with clear FR4: hobbyking.com/en_us/…
 
2 hours later…
Marla
Marla
22:03
@laptop2d . .years ago, we introduced a product with black satin color PCB. In our industry, induction heating (industrial), everyone always wanted to look in the cabinet.
And I cannot find a single photo of that first unit.
W5VO
W5VO
Heh, does the black solder mask change when it burns?
Marla
Marla
I think we didn't use a solder mask back then, 1991. Just a white silkscreen. @W5VO
W5VO
W5VO
Just the same, I'm guessing it hid any burn marks relatively well
Marla
Marla
It had to be really clean because left over rosin made it look very ugly.

« first day (3073 days earlier)      last day (2161 days later) »