KlausST
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Today, 13:07KlausST replied to a thread Minimum switching current for Mechanical switch in Miscellaneous EngineeringHi, You say it is 10mA "minimum" switching current. But you treat it as "maximum". I doubt that 10mA is the "maximum allowed" switching current -...3 replies | 90 view(s) -
Today, 12:58Hi, Since you have two data per clock period (one per edge): DCO of 455MHz gives 910MBPS. --> low margin. Klaus5 replies | 253 view(s)
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Yesterday, 21:46Hi, For sure. Your control unit is not able to decide whether the load is in delta or star connection (besides the magnitude of the current) ...13 replies | 647 view(s)
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Yesterday, 15:37Hi, I know what you mean. Just to be more exact: * DC means infinite time. * If time is finite ... better talk about a "pulse" And...12 replies | 452 view(s)
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Yesterday, 14:58Hi, YES, but only theoretically with an infinite big core. NO, for real transformers. The bigger the core, the lower the frequency you may...12 replies | 452 view(s)
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Yesterday, 02:31Hi, I agree with asdf44. You have contradicting requirements: * applying DC * non saturating * no output If you apply DC... then there...12 replies | 452 view(s)
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19th October 2019, 17:17...sorry for the wrong order of posts *************************** Hi, Again: We donīt see your system. Please give usueful informations. ...6 replies | 248 view(s)
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19th October 2019, 15:04Hi, Since we donīt know your circuit and your requirements ... we can only tell you the "usual" way. (And so do the internet documents) If your...6 replies | 248 view(s)
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19th October 2019, 13:05Hi, at first you need to test WHAT is causing this delay. Microcontroller? Modem? Access point? Routers? Server? Then you need to test WHY...1 replies | 151 view(s)
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19th October 2019, 11:06Hi, when I do an internet search for: "stm32 spi flash bootloader" I get about 250,000 hits. (Didnīt you do this already on your own?) There...6 replies | 248 view(s)
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19th October 2019, 07:22KlausST replied to a thread How to find cutoff frequency of the circuits in RF, Microwave, Antennas and OpticsHi, Circuit2 includes two "L", but your formula does not. According to your formula the cutoff frequency is independent of L .... I don't...3 replies | 279 view(s)
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18th October 2019, 08:06Hi, Maybe it's time to start from the beginning ... An engineer should start with specifying the requirements (forget about all the ADC and SPI...38 replies | 1698 view(s)
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17th October 2019, 18:17Hi, Maybe a production problem .. some 32768 Hz XTALs donīt like ultrasonic cleaning. Klaus12 replies | 549 view(s)
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17th October 2019, 16:31KlausST replied to a thread Getting trigger signal for 555 timer from elevator button. in Elementary Electronic QuestionsHi, there are millions. For a million of different requirements. But the most important - IMHO - is a proper PCB layout. The next important is...7 replies | 284 view(s)
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17th October 2019, 13:03KlausST replied to a thread Getting trigger signal for 555 timer from elevator button. in Elementary Electronic QuestionsHi, then itīs most probably an EMC problem, not a problem of the schematic. Use: (urgent) * PCB with solid GND plane * proper decoupling...7 replies | 284 view(s)
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17th October 2019, 12:25Hi, I donīt understand. Isolated but with no switching regulator. Due to the RS-422 you need energy to drive the 50 Ohms impedance signal...3 replies | 356 view(s)
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17th October 2019, 07:32KlausST replied to a thread Getting trigger signal for 555 timer from elevator button. in Elementary Electronic QuestionsHi, There are many solutins. I'd go this way: * use a 10k pullup on TRIG pin to 12V * use a diode from TRIG (A) to the pushbutton (C) Klaus7 replies | 284 view(s)
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16th October 2019, 23:19Hi, Datasheet says: Did you read and follow the application note? Klaus12 replies | 549 view(s)
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16th October 2019, 23:12Hi, I agree. But the OP asks about series connection. Klaus20 replies | 774 view(s)
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16th October 2019, 23:08Hi, Please read all my posts...especially those with "sampling rate" and what is meant with "toggle NSS". It's all written already. Klaus38 replies | 1698 view(s)
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16th October 2019, 22:34KlausST replied to a thread L293d - Input Voltage (motor operation) in Hobby Circuits and Small Projects ProblemsHi, General rule: Don't leave any inputs floating, neither at digital ICs nor at analog ICs...as long as it is not mentioned otherwise in the...3 replies | 510 view(s)
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16th October 2019, 13:39Hi, The two resistors are no "15V" generators. They just divide the input voltage by 2. --> If your supply voltage is 10V then the voltage at...20 replies | 774 view(s)
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16th October 2019, 07:58Hi, What advice do you expect? Cutoff voltage depends on battery, not on application. For sure you may measure the battery voltage...but it...5 replies | 290 view(s)
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16th October 2019, 07:01Hi Try this: * NPN, PNP, 2x R = 4k7 Wire it this way: * 30V --> NPN_C * NPN_E to PNP_E = 15V output * PNP_C to GND * resistors in series,...20 replies | 774 view(s)
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16th October 2019, 06:27KlausST replied to a thread Holding button for 2s to trigger 555 timer in Elementary Electronic QuestionsHi, On button press: the capacitor gets slowly discharged by a high ohmic resistor On button released: the capacitor fastly gets discharged via a...2 replies | 224 view(s)
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16th October 2019, 06:21Hi, read my previous posts that's the wrong way round Klaus38 replies | 1698 view(s)
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16th October 2019, 00:55Hi, If I need to know that, I'd compare the datasheets. I'd focus on voltage levels, timing... Klaus2 replies | 161 view(s)
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16th October 2019, 00:49KlausST replied to a thread L293d - Input Voltage (motor operation) in Hobby Circuits and Small Projects ProblemsHi, You should not guess, better read the datasheet. It clearly says every input voltage above 2.3V is valid HIGH level. Better than long...3 replies | 510 view(s)
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15th October 2019, 22:22Hi, A power voltage divider could be made with two equal resistors, an NPN and a PNP... Not very precise, but good enough for fans Klaus20 replies | 774 view(s)
About KlausST
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