BradtheRad
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Yesterday, 10:25BradtheRad replied to a thread water flow detection in a pipe in Hobby Circuits and Small Projects ProblemsTry a microphone in contact with the pipe. When flow rate becomes fast enough water makes a noise in pipes, say 1/2 to 1 inch diameter. It's most...6 replies | 193 view(s) -
1st April 2020, 17:07Consider using 2 of the modern Energizer Advanced Lithium type. The AA size puts out 1.8 volt new (regardless of being labelled 1.5V). The...3 replies | 217 view(s)
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1st April 2020, 07:10All evidence favors the long wire antenna. I suppose we would say the longer the better... And then I wonder if we should add, within reason?...6 replies | 261 view(s)
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1st April 2020, 06:04BradtheRad replied to a thread How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot in PCB Routing Schematic Layout software and SimulationSince 'Link reactivation' stands out... Could it have to do with either: performing startup process again, or to restore recognition of a device/...3 replies | 331 view(s)
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31st March 2020, 20:19BradtheRad replied to a thread Off-the shelf transformer for push pull converter in Power ElectronicsTo carry a desired spec Watt level, the transformer needs to have: sufficient metal thick enough wire gauge correct number of turns per winding...9 replies | 410 view(s)
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31st March 2020, 12:45The commercial AM band. For long wavelengths it's better (theoretically) to have a longer antenna high in the air as is practical. But then...6 replies | 261 view(s)
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31st March 2020, 12:14BradtheRad replied to a thread Off-the shelf transformer for push pull converter in Power ElectronicsA simulator makes it easy to experiment with component values. My simulation provides insight about the primary winding inductance value. (Although...9 replies | 410 view(s)
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31st March 2020, 08:30BradtheRad replied to a thread Circuit with an integrated FLIP FLOP in Hobby Circuits and Small Projects ProblemsSince output changes after a time (although inputs are unchanging)... Then it suggests there's a capacitor and resistor creating a time delay. This...9 replies | 462 view(s)
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31st March 2020, 01:08BradtheRad replied to a thread computer parallel port external relay control in Hobby Circuits and Small Projects ProblemsProgress means we gain something but something may be lost too. With parallel ports gone, we wonder how to send control signals from modern...9 replies | 442 view(s)
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30th March 2020, 19:10BradtheRad replied to a thread Samsung GT-P5210 10.1 inch Tablet repair in Service Manuals, Requests, Repair TipsIt's essential that you measure voltage coming from the charger when it's plugged into the tablet. It may not be easy to find suitable test points. ...1 replies | 205 view(s)
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30th March 2020, 02:35BradtheRad replied to a thread Dimmer lamp 220v ac (resistor values) in Elementary Electronic QuestionsSimilar projects are discussed in related threads listed further down this page. A halogen bulb is different from ordinary incandescent type....2 replies | 212 view(s)
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30th March 2020, 01:33BradtheRad replied to a thread Resistance of component bag made of "reddish" ESD plastic? in Elementary Electronic QuestionsConsider building this static charge detector. Made from a 4011 quad NAND gate. Red led lights for positive polarity, green led for negative. The...17 replies | 640 view(s)
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29th March 2020, 08:02BradtheRad replied to a thread How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot in PCB Routing Schematic Layout software and SimulationYou probably know about installing drivers for new hardware, and looking at Device Manager to see if any device causes an alert. Several...3 replies | 331 view(s)
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28th March 2020, 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...9 replies | 362 view(s)
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28th March 2020, 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...14 replies | 919 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 | 560 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 | 211 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...14 replies | 919 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 | 377 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,...3 replies | 407 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)...14 replies | 919 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...14 replies | 919 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 | 454 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 | 454 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 | 593 view(s)
About BradtheRad
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