KlausST
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Today, 08:04KlausST replied to a thread Harmonics in a 12 V brushed DC Motor in Electromagnetic Design and SimulationHi, Only you know whether this is true or not. My concerns: * How do you know your "highest frequency"? Like HF noise cause by the sparks. It...8 replies | 89 view(s) -
Today, 07:45Hi, I don't know what you want to achieve with your circuit. Please tell us your ideas. My view: You overcomplicate things ... and sadly this...23 replies | 2208 view(s)
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Yesterday, 20:55KlausST replied to a thread Connecting the load to VCM or to ground in single supply operation in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, If you want bipolar output you need to use VDD/2. If you just need unipolar output you may use GND. ... it depends on your application's...1 replies | 81 view(s)
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Yesterday, 20:50Hi, Ah is just charge, but you need to calculate with energy. Energy = Wh = Ah x V. Example. A 12V, 55mAH may deliver the same energy as a...3 replies | 101 view(s)
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Yesterday, 20:42KlausST replied to a thread Harmonics in a 12 V brushed DC Motor in Electromagnetic Design and SimulationHi, Without detailed information about your test and measurement steup we can only guess. RPM, anti aliasing filter, measurement time, sampling...8 replies | 89 view(s)
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Yesterday, 07:26KlausST replied to a thread My 12V DC Vending Machine motor rotates 1 extra 360 degree rotation sometimes. in Analog Circuit DesignHi, I just recognized that your wuring diagram shows the microswitch NC and NO to be shorted. This makes no sense, it makes the switch useless,...13 replies | 348 view(s)
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Yesterday, 07:15KlausST replied to a thread F151A 3204CRT Desktop motherboard IC in Analog Integrated Circuit (IC) Design, Layout and Fabrication(Sorry for the wrong order of posts now) Hi, I vote for standard logic IC: SN74F151A Of you don't think so: * show a better detailed photo...4 replies | 155 view(s)
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Yesterday, 06:52KlausST replied to a thread My 12V DC Vending Machine motor rotates 1 extra 360 degree rotation sometimes. in Analog Circuit DesignHi, Depending on microswitch wiring...at STOP position: * it can make the motor to free run (open) * or it can make the motor to break (short...13 replies | 348 view(s)
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22nd September 2019, 22:23David_ started a thread USB PD Lab Power Supply, flyback- vs forward-converter, pro's vs con's? in Power ElectronicsHello. I have what I think is a pretty neat idea, the latest laptop I bought feature a USB Type-C port which supports USB Power Delivery(USB...2 replies | 146 view(s)
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22nd September 2019, 09:21Hi, An OPAMP is an amplifier, it has an analog output. To detect "= logic output" you should use a comparator. (Although OPAMP and comparator...6 replies | 267 view(s)
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21st September 2019, 21:14Hi, Some think in LSBs. They like to use right aligned ADC values. I like to think in "full scale" ...i like left aligned. Some ADCs are...3 replies | 225 view(s)
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21st September 2019, 20:55KlausST replied to a thread Portable headphone amp w. batteries in Hobby Circuits and Small Projects ProblemsHi, There are class D headphone amplifiers. They will consume less power, which increases battery lifetime. Klaus14 replies | 410 view(s)
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21st September 2019, 07:58KlausST replied to a thread Runtime of clock using alkaline D cells instead of AA batteries in Elementary Electronic QuestionsHi, Please use correct units. * capacity is 15,000 Mah. --> 15,000 mAh * device using 120 Mah --> 120 mA (without "h") * and so on.. How...11 replies | 285 view(s)
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20th September 2019, 20:51Hi, Digital filters are relatively simple and precise. Maybe the bigger problem is the ADConversion. The correct sampling rate, resolution and...4 replies | 201 view(s)
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20th September 2019, 20:37Hi, Is all the isolation really necessary? It's more fast without optocouplers. And it's more fast when you don't feed the overcurrent signal...6 replies | 267 view(s)
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19th September 2019, 20:35KlausST replied to a thread Transimpedance amp for DC only (bandwidth limited) in Analog Circuit DesignHi, But the voltage across the diods should be only a couple of millivolts. Klaus12 replies | 351 view(s)
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19th September 2019, 07:15KlausST replied to a thread Transimpedance amp for DC only (bandwidth limited) in Analog Circuit DesignHi, No. Only the leakage of the capacitor may cause problems.. Use high quality polystyrene, if possible. * The diodes are for...12 replies | 351 view(s)
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18th September 2019, 07:55Hi Please confirm that you talk about current harmonics (and not voltage harmonics). (The difference is, that with "current" you simply can focus...11 replies | 875 view(s)
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18th September 2019, 07:34KlausST replied to a thread Operational amplifier driving capability test in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, I don't expect a 5% voltage drop on a non saturated, feedbacked OPAMP. Thus I expect the test setup was either in "non feedbacked"...11 replies | 344 view(s)
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18th September 2019, 06:52Hi, You already have recognized one important thing: The voltage across the battery does not tell much about charging status. Thus there are...1 replies | 166 view(s)
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17th September 2019, 23:30KlausST replied to a thread Operational amplifier driving capability test in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, What happens on overcurrent? Is the output weak, an thus the output voltage drops? Or is the ouput strong and the Opamp overheats? Klaus11 replies | 344 view(s)
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17th September 2019, 23:27KlausST replied to a thread li-ion voltage reducer to 3volt - help needed in Hobby Circuits and Small Projects ProblemsHi, The problem with this shunt voltage regulator is, that it draws a lot of current. Li-ion voltage is above 3.6V even when it is discharged to...7 replies | 505 view(s)
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17th September 2019, 07:38KlausST replied to a thread Higher Current Consumption than expected with AFE and embedded Flash in IoT - Internet of ThingsHi, As already said (and if not otherwise mentioned): close to VCC or close to GND. It is written in the datasheet, and I assume the IC...6 replies | 294 view(s)
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17th September 2019, 06:51KlausST replied to a thread Higher Current Consumption than expected with AFE and embedded Flash in IoT - Internet of ThingsHi, Please confirm that at any time no pin is left floating, neither a used pin nor an unused pin. Usually input pins where the voltage level...6 replies | 294 view(s)
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16th September 2019, 07:32KlausST replied to a thread Li-ion Battery charger need help in Hobby Circuits and Small Projects ProblemsHi, May I ask why you didn't read the datasheet? It is no Li-Ion, it specifies the charging method, it specifies the charging current, which is...4 replies | 282 view(s)
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16th September 2019, 06:27KlausST replied to a thread Li-ion Battery charger need help in Hobby Circuits and Small Projects ProblemsHi, What exactly does the datasheet say? 1C is typical or recommended charge current, or maximum charge current? (Why don't you post a link to...4 replies | 282 view(s)
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15th September 2019, 14:17KlausST replied to a thread How can I tell if my laptop screen is LED or LCD? in Elementary Electronic QuestionsHi, There are laptops with OLED display. Thus I recommend to look into the operating manual of the laptop or consult the manufacturer's...5 replies | 281 view(s)
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15th September 2019, 02:48KlausST replied to a thread li-ion voltage reducer to 3volt - help needed in Hobby Circuits and Small Projects ProblemsHi, There are linear LDOs. And there are switch mode step down converters, also called buck converters. All have their benefits and drawbacks....7 replies | 505 view(s)
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15th September 2019, 02:20Hi, There are electronic devices called capacitors. Do you know them? Klaus Added: Your schematic violates general rules how to use gate...26 replies | 901 view(s)
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14th September 2019, 07:55Hi, Basically every overvoltage protection includes: * a serially connected device to limit the current (even wiring) * a parallel connected...8 replies | 406 view(s)
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