BradtheRad
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Yesterday, 23:31BradtheRad replied to a thread UA78M33CDCY 3,3 volt regulator will not regulate at input voltage above 12 volt... in Analog Circuit DesignThere is always this ordinary voltage regulator made from an NPN and zener diode. The zener can be a string of led's and/or diodes. It can even...10 replies | 137 view(s) -
Yesterday, 03:25Files less than 500kB are more likely to get through the upload routine. This is not a rigid rule but a glitch during upload could cause the system...13 replies | 275 view(s)
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15th June 2019, 23:32Nowadays the 'Insert Image' icon seems to be the reliable method. Once your image uploads successfully, submit your message within a minute or...13 replies | 275 view(s)
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15th June 2019, 19:01BradtheRad replied to a thread How to make cluster computer with MSI desktop and MSI laptop in General ComputerCan you find (or write) software that simply sends and receives data via USB at each computer? If you can gain control over such communication then...2 replies | 165 view(s)
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14th June 2019, 05:23Shortcircuit protection circuit - post#15 ] A few years ago forum administrators decided it was too easy for any spammer to post a message, then...4 replies | 140 view(s)
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13th June 2019, 14:20Is your initial power source 12V? If so then the step-up ratio is 2 which leads to the option of a voltage doubler based on capacitors. This...12 replies | 283 view(s)
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11th June 2019, 07:17Buck converter controlled by transistors. NPN & PNP arranged as a sziklai pair. They provide high gain, resulting in snap action. The waveform...5 replies | 155 view(s)
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11th June 2019, 02:51Consider interleaving two or more boost converters. By staggering On-times, it lets you operate additional mosfets yet stay within limits.12 replies | 283 view(s)
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11th June 2019, 02:32BradtheRad replied to a thread Speakers make a loud noise when turning off. Is there a way I can eliminate it? in Service Manuals, Requests, Repair TipsSince the loud pop is heard in both channels, it suggests a power supply problem. (Whereas if it were in only one channel, then you could try...15 replies | 379 view(s)
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9th June 2019, 04:46BradtheRad replied to a thread [moved] Digital Transition Capture in ASIC Design Methodologies and Tools (Digital)I wonder whether some kind of flip-flop detector would work. However I'm not certain whether you can get it to it work on a single up or down...11 replies | 398 view(s)
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9th June 2019, 03:51You have two diode bridges across a tapped transformer. It looks okay on paper but it needs close checking to be certain you avoid a short circuit...29 replies | 1236 view(s)
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7th June 2019, 06:29BradtheRad replied to a thread [SOLVED] Operation of variable inductance in Elementary Electronic QuestionsWere these installed in old-fashioned radios? I've read how regenerative receivers were built for a while. They had an extra tuning knob attached to...7 replies | 206 view(s)
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7th June 2019, 05:36It's suitable to stay with this thread since its title still describes the purpose of your project. And topologies being considered, in hopes to...10 replies | 377 view(s)
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7th June 2019, 05:26Your screenshot shows the Capacity selector having a pop-down arrow to the right. What options do you see when you click the Capacity selector? If...18 replies | 552 view(s)
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7th June 2019, 04:56BradtheRad replied to a thread How to move metal elements via magnetic waves? in Hobby Circuits and Small Projects ProblemsA grid of electromagnets under the table might do the job. Make the metal piece globe-shaped, or else floating on water. Turn on a nearby...7 replies | 245 view(s)
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7th June 2019, 04:39BradtheRad replied to a thread Spread spectrum clock generator using dcdl in PLD, SPLD, GAL, CPLD, FPGA DesignTo delay a pulse train, one easy method is to send it through an RC integrator. This results in a ramping (or quasi-triangular) waveform. Restore DC...6 replies | 212 view(s)
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5th June 2019, 07:43BradtheRad replied to a thread TL431 temperature compensation method question in Analog Circuit DesignA 5V zener diode is relatively unaffected by temperature. At that volt spec, the effect of avalanche breakdown and tunneling breakdown are about...18 replies | 630 view(s)
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5th June 2019, 06:48BradtheRad replied to a thread Voltage inverter feedback for microcontroller (TL431 and 4N25) in Power ElectronicsYou have 12v going through 220k ohms (R54). This results in 55 uA which is available to light the led in the optocoupler. It's a miniscule amount....9 replies | 271 view(s)
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5th June 2019, 03:52Don't some tv's perform degaussing briefly every time you turn it on? Then if your degaussing circuit draws overmuch current, the power supply...8 replies | 535 view(s)
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5th June 2019, 03:39BradtheRad replied to a thread simple proximity sensor, help needed in Hobby Circuits and Small Projects ProblemsTo be useful your project ought not send an alert in total darkness even though IR is absent then. I think you want a circuit which has two...5 replies | 228 view(s)
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4th June 2019, 02:51I lean toward calling them 'switched-coil' converters because it is more specific and more descriptive (seeing that they contain one or more...5 replies | 193 view(s)
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