barry
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Yesterday, 17:16Why a resistor in parallel? That will just change the voltage scaling.6 replies | 129 view(s)
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Yesterday, 16:29Your attachment tells us nothing, other than the physical dimensions of the transformer and that there are a 330 and 470 ohm resistors on the...6 replies | 129 view(s)
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Yesterday, 14:28It says right there : maximum current, 5 amps. What’s your question? If you exceed the PLAINLY STATED manufacturer’s spec, you’re on your own....6 replies | 129 view(s)
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14th September 2019, 06:47I’m not about to analyze 5000 lines of code, but it looks like your problem is that it multiplexes the 4 digits properly and then blanks them for a...3 replies | 198 view(s)
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13th September 2019, 23:01barry replied to a thread FYP ideas suggestion on FPGA, or FPGA based network processing/network on chip in PLD, SPLD, GAL, CPLD, FPGA DesignI don’t know what a ‘fyp tittle’ is. Could you explain?5 replies | 257 view(s)
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13th September 2019, 21:46barry replied to a thread [SOLVED] Diode performance specification in Elementary Electronic QuestionsWhich is telling you that if those are critical parameters for you, you shouldn’t be using that particular device. It’s like asking what the 0 to 60...4 replies | 381 view(s)
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12th September 2019, 18:56barry replied to a thread Operating four Tx-Rx pairs in close proximity in Hobby Circuits and Small Projects ProblemsI'm a bit confused. If your input scanning rate is slow, you can sample an input, transmit the appropriate data, and then wait an eternity before you...7 replies | 290 view(s)
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12th September 2019, 17:39barry replied to a thread Operating four Tx-Rx pairs in close proximity in Hobby Circuits and Small Projects ProblemsCan you synchronize the transmitters so that only one is transmitting at a time?7 replies | 290 view(s)
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12th September 2019, 16:46barry replied to a thread Operating four Tx-Rx pairs in close proximity in Hobby Circuits and Small Projects ProblemsI'm not an RF guy, but I have to believe that if you've got four transmitters running at the same frequency, a receiver is going to get garbage.7 replies | 290 view(s)
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11th September 2019, 21:37barry replied to a thread Lamp Test Circuit with some other indications. in Service Manuals, Requests, Repair TipsThere are thousands of diodes that would work. The two I recommended are extremely common; cheap and plentiful. What’s wrong with those? If you don’t...15 replies | 801 view(s)
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11th September 2019, 16:06barry replied to a thread Lamp Test Circuit with some other indications. in Service Manuals, Requests, Repair TipsThose are Schottky diodes. If you had actually gone to the trouble of reading the data sheet, you’d see that they have 1ma of reverse leakage...15 replies | 801 view(s)
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9th September 2019, 20:57barry replied to a thread Lamp Test Circuit with some other indications. in Service Manuals, Requests, Repair TipsThe ONLY possible current path is through reverse biased diodes. Either you've got something wired wrong, or those diodes are leaking.15 replies | 801 view(s)
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9th September 2019, 14:46barry replied to a thread Change colors of liquid crystal display in Hobby Circuits and Small Projects ProblemsWHAT??? You had a white LED which gave a blue background and white numerals. Then you changed the LED to red, which gave you a red background with...5 replies | 455 view(s)
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8th September 2019, 04:10barry replied to a thread Lamp Test Circuit with some other indications. in Service Manuals, Requests, Repair TipsI’m not even sure WHAT this circuit does. Just a whole bunch of diodes.15 replies | 801 view(s)
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8th September 2019, 01:33barry replied to a thread Lamp Test Circuit with some other indications. in Service Manuals, Requests, Repair TipsYou don’t tell us switch positions or component values or what that “volt meter” is, but I suspect you’ve got some leakage through your diodes, or...15 replies | 801 view(s)
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5th September 2019, 18:51barry replied to a thread Spacing Between PCB Pad and HEATSINK in PCB Routing Schematic Layout software and SimulationI've seen the breakdown voltage of air listed as 1.1KV/mm; and as 30KV/cm. Not sure where those come from, and they're quite different. There's also...3 replies | 382 view(s)
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5th September 2019, 02:10Your MUX will also have some resistance. And a tolerance.9 replies | 494 view(s)
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3rd September 2019, 16:17barry replied to a thread Digital Storage Oscilloscope - newbie questions in Elementary Electronic Questions1) what do you mean "normal"? Yes, there will be ripple on a regulator output. It depends on load, input, filtering...15 replies | 578 view(s)
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3rd September 2019, 16:14barry replied to a thread Generating the waveform as in the image in RF, Microwave, Antennas and Optics1) buy a signal generator with burst function. 2) use a dds chip 3) use an fpga with a DAC and create your own dds. 4) use a 3KHz oscillator and a...6 replies | 315 view(s)
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3rd September 2019, 16:09barry replied to a thread Electrical type for pins in Altium Designer in PCB Routing Schematic Layout software and SimulationWhat error?1 replies | 242 view(s)
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3rd September 2019, 16:07It shouldn't do that; either you're doing something wrong or your part is defective. Show your schematic.1 replies | 218 view(s)
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3rd September 2019, 02:04barry replied to a thread large slack (Reg2Reg) after placement (IC Compiler & Physical design) in ASIC Design Methodologies and Tools (Digital)More slack is a good thing, not a bad thing. Why do you want to reduce it?3 replies | 426 view(s)
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2nd September 2019, 19:57I turned off subscriptions, and it seemed ok for a while, but it’s back again. Seems it re-occurred after somebody responded to a thread I had...19 replies | 2052 view(s)
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1st September 2019, 21:04barry replied to a thread Homemade music lighting system with controller board(s) in Hobby Circuits and Small Projects ProblemsWithout knowing how much current each device draws, it’s impossible to answer your question.8 replies | 622 view(s)
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31st August 2019, 19:53barry replied to a thread [SOLVED] obtaining dielectric constant for of a polymer in Elementary Electronic QuestionsMaybe you should be asking how to do an internet search. This took me nearly 10 seconds to find: ...1 replies | 190 view(s)
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31st August 2019, 16:53barry replied to a thread [SOLVED] Problem in designing proper voltage shifter in Elementary Electronic QuestionsYou make no mention of required accuracy or ADC resolution; THAT will determine what opamp you need. But you certainly don’t need TWO GHz amps.5 replies | 371 view(s)
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31st August 2019, 03:11The “My Account “ field has a padlock on it. I can’t select it.19 replies | 2052 view(s)
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31st August 2019, 02:09Logged out. Deleted cookies. Fixed time zone. Don’t know how to change subscription action. But same problem still exists.19 replies | 2052 view(s)
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30th August 2019, 16:39Yes. This happens on my desktop, laptop and iPad, and different browsers, so it’s apparently something to do with my account.19 replies | 2052 view(s)
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