KlausST
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Yesterday, 06:40Hi, Before we talked about V_ce of the first bjt (to safely switch OFF the second bjt), now you talk about the V_ce of the second bjt. We have...7 replies | 223 view(s) -
21st July 2019, 21:17Hi, Why no Mosfet? Klaus7 replies | 237 view(s)
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21st July 2019, 21:13Hi, Another post asking for a "best" device.... Ask 10 designers for the "best" part and get 10 different answers. Klaus4 replies | 159 view(s)
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21st July 2019, 21:03Hi, ...and where are your requirements? Voltage, LED current range, input signal type and range, precision, settling time... Klaus3 replies | 201 view(s)
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21st July 2019, 11:44Hi, Without additional information I see no reason why not to decrease R215 .. maybe increase C214 to get the desired timing. It should improve...7 replies | 223 view(s)
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21st July 2019, 11:35KlausST replied to a thread What is the difference between IRF510 and IRF510N? in Analog Circuit DesignHi, You buy a "unbranded" electronic device, made in china, from an unreliable source, without datasheet. So what do you expect from us? All we...7 replies | 218 view(s)
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21st July 2019, 10:38Hi, No, just to minimize the count of modifications to the given schematic... There are so many ways and so many reliable and proven circuits...24 replies | 949 view(s)
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21st July 2019, 10:17KlausST replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsHi, Don't stress. This is not a "very" diffucult to solder device. I even don't see the need for extra flux, since a good solder (wire as well...10 replies | 360 view(s)
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21st July 2019, 09:44Hi, ...or use a HCT595... Klaus24 replies | 949 view(s)
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21st July 2019, 08:44Hi, It does not work ... how can it be correct? Klaus24 replies | 949 view(s)
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21st July 2019, 07:57KlausST replied to a thread SVPWM crooked 3-phase inverter output. What is wrong with the circuit ?[PROTEUS] in PCB Routing Schematic Layout software and SimulationHi, Without the information what the scope pictures show, they are about useless. Where dud you connect "input" and "output"? If possible show...1 replies | 117 view(s)
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21st July 2019, 07:39Hi, A standard procedure for debugging circuits: * Measure the HIGH and LOW voltage levels at the HC595 inputs... * cross check with datasheet...24 replies | 949 view(s)
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21st July 2019, 07:18KlausST replied to a thread [moved] 74HC4060 Oscillator/Counter Frequeny Problem in Analog Circuit DesignHi, Show a photo of your circuit, where we can see all your connections. There are many manufacturers that produce HC4060. Please tell us the...1 replies | 153 view(s)
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21st July 2019, 00:16KlausST replied to a thread ELECTRICAL AND ELECTRONICS Instrumentation in Elementary Electronic QuestionsHi, RMS+RMS = RMS is only true for signals of same waveform, same frequency and sane phase. Now you ask: "Why all the extra...23 replies | 692 view(s)
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20th July 2019, 19:25Hi, To the circuit. I think it should work. Some ideas that come into my mind: * the current through the zener is much lower than specified...7 replies | 223 view(s)
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20th July 2019, 19:00Hi, 50uA base current isn't extremely low. And the datasheet tells a lot of low curents: Look at "ON CHARACTERISTICS" -> "DC current gain"...7 replies | 223 view(s)
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20th July 2019, 09:40Hi, Spacing? I don't know what you want to achieve, but in case you want some IMD simulation, both frequencies need to be at the same time. ...2 replies | 134 view(s)
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20th July 2019, 09:31KlausST replied to a thread Identify capacitor with marking code L62 104 in Service Manuals, Requests, Repair TipsHi, OK, why not think the other way round? You say the capacitor is defective ... then maybe it wa not the best suited capacitor for this...10 replies | 307 view(s)
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20th July 2019, 09:25KlausST replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsHi, It seems on your PCB the center pad is not connected to GND.. I don't think using loads of solder paste is a good idea. Maybe use the...10 replies | 360 view(s)
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20th July 2019, 08:40Hi, Please be more specific, give examples. Klaus4 replies | 191 view(s)
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20th July 2019, 06:58Hi, Documents may use the abbreviations in different ways.... Did you read the datasheet(s)? * If NO, then do this first. * If YES, then...4 replies | 191 view(s)
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19th July 2019, 22:25KlausST replied to a thread Identify capacitor with marking code L62 104 in Service Manuals, Requests, Repair TipsHi, Of course. 100n. 10 x 10^4 = 100,000 pF. Maybe it's a bit late today for me. Klaus10 replies | 307 view(s)
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19th July 2019, 20:57Hi, There are datasheets... telling you the measures. Klaus4 replies | 295 view(s)
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19th July 2019, 20:55KlausST replied to a thread Identify capacitor with marking code L62 104 in Service Manuals, Requests, Repair TipsHi, I agree with: "104 means 10,000 pF" = 10 x 10^4 pF (can be found million times in the internet) But it's 10nF then... Klaus10 replies | 307 view(s)
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19th July 2019, 20:27Hi, I'm confused, too. I also don't understand, why an FPGA comes into play...and boot time of it, and where the 5A are... From post #1: ...12 replies | 437 view(s)
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19th July 2019, 07:23Hi, Why do you say "big capacitor"? .. and what does it mean? Physically big, or big capacitance value? What are your requirements? There is...12 replies | 437 view(s)
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19th July 2019, 07:16KlausST replied to a thread Hand soldering a 6x6mm QFN (28pin) in Hobby Circuits and Small Projects ProblemsHi, Yes, homebrew soldering with a stencil, solder paste and a heating plate. But if you are asking about a soldering iron with a single...10 replies | 360 view(s)
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19th July 2019, 07:03KlausST replied to a thread [SOLVED] LM741 Amplifier not working with IR2110 IC [PROTUES] in PCB Routing Schematic Layout software and SimulationHi, The arduino output is "digital", and so is the IR2110 input. But the Opamp is an "analog" circuit. Don't mix analog and digital this way. ...6 replies | 351 view(s)
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18th July 2019, 23:46KlausST replied to a thread Source of resistors without buying bulk in Hobby Circuits and Small Projects ProblemsHi, Farnell for example sells resistors. But without knowing the package....we even don't know whether you want THM or SMD... Klaus2 replies | 125 view(s)
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18th July 2019, 20:59KlausST replied to a thread Problem with my echo circuit using PT2399 in Hobby Circuits and Small Projects ProblemsHi, My idea: The echo is inverted (for low frequencies). Klaus3 replies | 196 view(s)
About KlausST
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