BradtheRad
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Yesterday, 19:47BradtheRad replied to a thread matching network design question in Analog Integrated Circuit (IC) Design, Layout and FabricationSome definite amount of ohmic resistance ought to be ahead of your filter. Looking closely, that appears to be a resistor just above the waveform...8 replies | 168 view(s) -
Yesterday, 07:19BradtheRad replied to a thread Help needed; Check of PCB and some other questions in Hobby Circuits and Small Projects ProblemsThen what you installed may be sufficient. The source of noise isn't much different from the buzzing that comes through an amplifier when the...12 replies | 602 view(s)
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27th March 2020, 21:26The hatched area is the region that generally works for low voltage, low current circuits (I think). The upper and lower limit are approximate (obere...5 replies | 442 view(s)
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27th March 2020, 09:49BradtheRad replied to a thread PAC and PSTB for switched capacitor integrator in Analog Circuit DesignI think your schematic ought to include some amount of resistance at each incoming voltage. And for good measure put a resistance in series with...1 replies | 154 view(s)
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27th March 2020, 09:34BradtheRad replied to a thread Help needed; Check of PCB and some other questions in Hobby Circuits and Small Projects ProblemsIt sounds as though you have 50kHz pulses running through tracks separated by 1 mm, for a few feet of length. There is a certain amount of inductance...12 replies | 602 view(s)
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27th March 2020, 09:04BradtheRad replied to a thread Looking for an non-invasive sensor for a fitness machine in Hobby Circuits and Small Projects ProblemsI imagine there's a metal arm or pivot moving just inside the housing, which you could detect with a strong magnet. And the magnet may produce...4 replies | 282 view(s)
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26th March 2020, 05:57BradtheRad replied to a thread need translation from Chineese to English in Service Manuals, Requests, Repair TipsThere are free translation websites. One method is to highlight the characters (by mousing through them), then copy and paste. (Example,...2 replies | 283 view(s)
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26th March 2020, 00:29BradtheRad replied to a thread Help needed; Check of PCB and some other questions in Hobby Circuits and Small Projects ProblemsI can see why all led's and sensors must point 90 degrees from two flat PCB's facing each other. The length of your narrow circuit board (1050 mm)...12 replies | 602 view(s)
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24th March 2020, 23:01BradtheRad replied to a thread Help needed; Check of PCB and some other questions in Hobby Circuits and Small Projects ProblemsYour image is a long, thin pcb. Detail is visible by enlarging it. Did you intend for your sensor data sheet to be a duplicate of your pcb? Is...12 replies | 602 view(s)
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24th March 2020, 10:59vivekroy replied to a thread Differential comparator with reference comparison voltage level in Analog Integrated Circuit (IC) Design, Layout and FabricationThe paper references to Razavi's textbook for the comparator xD5 replies | 393 view(s)
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24th March 2020, 10:15vivekroy replied to a thread Differential comparator with reference comparison voltage level in Analog Integrated Circuit (IC) Design, Layout and FabricationIf it was a common mode feedback circuit, it would have compared (voutp+voutm)/2 with VR. From the description by the author it seems like it...5 replies | 393 view(s)
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24th March 2020, 08:25BradtheRad replied to a thread [SOLVED] Effect of LC filter in simulation of BTL H-Bridge inverter? in Power ElectronicsThe screenshots are Falstad's animated simulator. Free to download and use at (your computer needs to have Java installed): falstad.com/circuit ...12 replies | 476 view(s)
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24th March 2020, 06:37Yes, there it is, looking at the graph in the Elemente book link (looks like page 211). The graph relates frequency to Zo... and Zo is...5 replies | 442 view(s)
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24th March 2020, 00:41Diluted hydrogen peroxide is germicidal and non-allergenic. There are claims that ultra-violet lamps disinfect surfaces. A review article is in...7 replies | 793 view(s)
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24th March 2020, 00:32A high L:C ratio takes more cycles to grow to a steady state from power-up. It also rings for a longer time after shut-off. The reason is that it...5 replies | 442 view(s)
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24th March 2020, 00:20BradtheRad replied to a thread [SOLVED] Effect of LC filter in simulation of BTL H-Bridge inverter? in Power ElectronicsThose capacitors to ground provide a direct path for damaging high current, if LC resonance was instigated by switching at certain frequencies. ...12 replies | 476 view(s)
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22nd March 2020, 06:41Yes, if it's available. What is your power source? It may be easier to convert that. It's likely the laptop can operate on 19V... maybe even 18V or...10 replies | 568 view(s)
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20th March 2020, 18:56I guess the join node of your coils is ground? It would be best if your schematic includes a power source and wiring, as well as current return paths.3 replies | 307 view(s)
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20th March 2020, 06:03BradtheRad replied to a thread Non Overlapping Clock Generator(4 outputs with same frequencies as the input clock) in PLD, SPLD, GAL, CPLD, FPGA DesignA shift register provides non-overlapping pulses. It's made from D flip-flops (as you first mentioned). Classic digital logic. Works at any clock...17 replies | 868 view(s)
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19th March 2020, 22:54BradtheRad replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsCorrect. Lamp dimmers started early to be a common role for triacs decades ago. Where there was a diac, schematics often substituted a neon bulb....49 replies | 1678 view(s)
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19th March 2020, 09:49BradtheRad replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsSince it's not easy to find thorough instructions about triggering SCR's, it implies they're not the easiest devices to work with. Each must be...49 replies | 1678 view(s)
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19th March 2020, 08:56To some extent you can gauge speaker quality by the size of the magnet. A small magnet (say 1.5 inch diameter.) suggests it's for low volume and low...2 replies | 281 view(s)
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19th March 2020, 03:00BradtheRad replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsStart with the simplest possible simulation to trigger an scr. Apply increasing voltage to the gate (referenced to ground). See what level of current...49 replies | 1678 view(s)
About BradtheRad
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- Born 1953. Some college.
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