Help required with 22V10 - Using a pin as Input an Output

Started by Dave Hitchins in sci.electronics.basics9 months ago 1 reply

I'm having problems with the SDA part of an IIC implementation in a AMD 22V= 10C (not from China!). I can Output data, to the SDA output, but I'm...

I'm having problems with the SDA part of an IIC implementation in a AMD 22V= 10C (not from China!). I can Output data, to the SDA output, but I'm not ab= le to read the SDA input! My CUPL equations, as a whole, compile OK using W= INCUPL and the .JED file programs OK. These are the intermediate declarations: FCD7=C2=A0=C2=A0=3D !nPFC & A7 & A6 & !A5 & A4 & !A3 & A2 & A1 & A0; SCLH=C2=A0...


? on old electrolytic caps

Started by Dave in sci.electronics.basics9 months ago 23 replies

I have an LCR meter which shows the ESR for electrolytic caps, but I have no idea how to interpret this number. How do you know if a cap is...

I have an LCR meter which shows the ESR for electrolytic caps, but I have no idea how to interpret this number. How do you know if a cap is shorted or boardering on that status? I mean, if it gives me a reading of zero Ohms, that's obvious, but what if a small (4.7uF), medium voltage (35V) cap comes up with a reading of, say, 3 Ohms? Is that too low, like I expect, or should it be co...


PSU for valves

Started by Peter in sci.electronics.basics9 months ago 12 replies

I thought I'd experiment with a few valve circuits (just for fun). So I'll need an H.T. power supply and I'm looking at...

I thought I'd experiment with a few valve circuits (just for fun). So I'll need an H.T. power supply and I'm looking at this: https://www.timstar.co.uk/el120300-high-tension-ht-power-supply.html It supplies up to 300V at 60mA. My question is, is 60mA sufficient? -- When, once, reference was made to a statesman almost universally recognized as one of the villains of this century, in order...


Why So Many Products With Poorly Designed Parts Still Do the Job

Started by Bret Cahill in sci.electronics.basics9 months ago 3 replies

At first you wonder how they got the difficult part correct and screwed up the easy part. The parts that fall apart aren't really necessary so...

At first you wonder how they got the difficult part correct and screwed up the easy part. The parts that fall apart aren't really necessary so you can still use the thing. Often it is better stripped of the unnecessary junk. So why are only the frivolous extras breaking? This is easy to explain. They put the bright people on the essential difficult part and the less competent people o...


Thermostat

Started by Olden in sci.electronics.basics10 months ago 7 replies

Best to ask here or ? My gas furnace is a Holly. It has an old mercury two wire thermostat. I want to change the thermostat so that I can...

Best to ask here or ? My gas furnace is a Holly. It has an old mercury two wire thermostat. I want to change the thermostat so that I can set the same two temperature ranges, day / night, for every day. I do not understand thermostats. The local store does not know how to advise me. Thermostat suggestions please and maybe a little tutorial.


Really Basic Power On Question

Started by Bret Cahill in sci.electronics.basics10 months ago 1 reply

This must be a really really common problem and the only reason it is diffi= cult to find on youtube is the wrong search terms: If a device...

This must be a really really common problem and the only reason it is diffi= cult to find on youtube is the wrong search terms: If a device has a power on button latch switch and you want it to turn on a= nd off like a light bulb, i. e., when the power supply is plugged in or a r= elay connects the power, or for solar, when the sun comes up, is it a commo= n solution to run a wire from th...


Use resistor instead of regulator?

Started by John Doe in sci.electronics.basics10 months ago 35 replies

I can put a resistor after a voltage that's too high for the circuit? Of course the resistor must handle the current. A decoupling capacitor...

I can put a resistor after a voltage that's too high for the circuit? Of course the resistor must handle the current. A decoupling capacitor after the resistor. Any problems with that? Thanks.


3 phase AC to DC

Started by malua mada! in sci.electronics.basics10 months ago 5 replies

I am running 3 phase AC into a set of transformers, Y config, and thence into bridge rectifiers . One leg of the output side of the transformers...

I am running 3 phase AC into a set of transformers, Y config, and thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes. the other leg to the Y connection. That Y connection gets warm. (why?) Should it be connected to DC ground?


Ten 860v Electric Eels Wire Themselves In Series

Started by Bret Cahill in sci.electronics.basics10 months ago 1 reply

"For The First Time, Electric Eels Have Been Seen Hunting And Zapping Prey as a...

"For The First Time, Electric Eels Have Been Seen Hunting And Zapping Prey as a Group" https://www.sciencealert.com/for-the-first-time-electric-eels-have-been-recorded-hunting-in-a-sh oal/amp Maybe not.


AI Facial Recognition To ID tRUMP Terrorists On the Mall

Started by Bret Cahill in sci.electronics.basics11 months ago 3 replies

It might not be that difficult for AI to ID aggrieved violent expressions with high accuracy, much like the app developed at MIT that can ID a...

It might not be that difficult for AI to ID aggrieved violent expressions with high accuracy, much like the app developed at MIT that can ID a covid cough 97% of the time. That way when the crazies get near the perimeter set up around the Mall, Park Police can separate them from normal folk, tear gas them if they try anything cute. tRUMP will never pardon the ijiots because as H. Stern point...


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