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Time for a New PC - Speed Specs?
... and if any of the ghosts eat you, we shall take it out back by the woodshed and it'll never be seen again.  S.
Thursday, 30 July 2020 - 16:45
Algorithm to determine if any number appears more than once in list
awneil wrote: Brian Fairchild wrote: 5. Prototype your solution   Amazing how many people - both here & elsewhere - leap straight to a custom PCB without ever having...
Thursday, 30 July 2020 - 16:06
Algorithm to determine if any number appears more than once in list
js wrote: The water is contaminated.   Certainly is if you've left a lot of dead leaves soaking around in it.    S.
Thursday, 30 July 2020 - 05:46
Referring laptop USB to Mains ground - bad idea?
I have personally blown boards doing exactly this.  Fortunately, the boards went before the controller PC did.   Having an isolation transformer on your bench is a...
Tuesday, 28 July 2020 - 22:15
How many watts of solar would I need?
There is no worthwhile energy storage system such that, when the energy stored therein is rapidly released, doesn't go boom.  That's sorta the very definition of energy...
Tuesday, 28 July 2020 - 06:09
How many watts of solar would I need?
There's a roaring research field in using magnetically-levitated flywheels as energy storage, but I don't really think any are quite ready for prime-time.  A Google search on...
Monday, 27 July 2020 - 20:54
How many watts of solar would I need?
Kartman wrote:Interestingly, due to the proliferation of solar systems, there is a lot of hard data to draw from. The solar companies have this, so they can estimate fairly...
Sunday, 26 July 2020 - 10:23
328P sleep current wildly different between two copies
Speaking of picking things up from Digikey, they sell quite a variety of current sensor ICs with shunt resistance in the milli (and micro I think!) ohm range.  Might take a...
Sunday, 26 July 2020 - 01:17
Requesting advice: MOSFET or IGBT in place of BJT?
Krupski wrote: It's no fun to watch $60 swirl down the drain because some idiot (me) stuck a toe outside the SOA...    Oh, it may be no fun for you, but it's great fun...
Saturday, 25 July 2020 - 03:44
Requesting advice: MOSFET or IGBT in place of BJT?
ki0bk wrote: Use an MJ11033 if you need more current. Jim   They have "interesting" Safe Operating Area curves too.  Ask Me How I Know...    S.
Friday, 24 July 2020 - 03:20
Power BJT strange functioning - am I doing something wrong?
There has also been a LOT of development work in BJTs since the heyday of the 2N3055, but as the graphs show, it has been towards high currents at low voltages.  Your other...
Thursday, 23 July 2020 - 21:31
Power BJT strange functioning - am I doing something wrong?
ron_sutherland wrote: From memory (>20 years ago, so probably wrong), I seem to recall something about current crowding is a problem with large BJT. Once an area of the silicon...
Thursday, 23 July 2020 - 21:16

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