KlausST
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Today, 15:05KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, Eventually we see the voltage at the capacitor rising until the diac triggers. But - according datasheet - I can't see why it should stay at...85 replies | 2806 view(s) -
Today, 10:22Hi, Posting a schematic from a datasheet is useful to discuss the correctness of this schematic. But I assume this schematic is correct ... and...9 replies | 426 view(s)
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Today, 10:11KlausST replied to a thread Waht is the name of ATX connector on motherboard? in Hobby Circuits and Small Projects ProblemsHi, I did an internet search "atx power supply connector type". And guess what: The first hit gave manufacturer and exact type of the...2 replies | 88 view(s)
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Today, 10:04KlausST replied to a thread Please help me avoid a disaster with my first pcb in Hobby Circuits and Small Projects ProblemsHi, As a raw rule: put a decoupling capacitor at each power supply pin of every IC. For sure, if the modules have integrated Cs, you may omit...9 replies | 309 view(s)
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Yesterday, 19:10Hi, a FET has three connections * Gate * Source * Drain in your case the left FET`s source is conneted to VDD and gate and drain are joined...3 replies | 164 view(s)
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Yesterday, 19:02KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, Please tell which of Brianīs posts are you talking about. Canīt remember he talked about oscillation. But maybe... Klaus85 replies | 2806 view(s)
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Yesterday, 12:40KlausST replied to a thread Please help me avoid a disaster with my first pcb in Hobby Circuits and Small Projects ProblemsHi, Oh yes, thanks. Indeed itīs the (red) "VCCIO" net connected to pin1 (square pad) of DHT22 (I was confused by the double side assembled...9 replies | 309 view(s)
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Yesterday, 07:57Hi, * IRef pulls down the voltage of node N * Left side Mosfet tries to pull this node up ... with it's R_DS. Now let's assume R_DS is...3 replies | 164 view(s)
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Yesterday, 07:46KlausST replied to a thread Please help me avoid a disaster with my first pcb in Hobby Circuits and Small Projects ProblemsHi, I agree with the others. For a first PCB layout it's not that bad. I'd add power supply decoupling capacitors. SMD. Regarding THM...9 replies | 309 view(s)
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Yesterday, 02:38KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, When the switch is open, then node may be seen as "floating". Floating means "undefined" .... anything can happen. That's why I wrote "2)...85 replies | 2806 view(s)
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3rd April 2020, 22:02KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, .. and the diac in series to the scope makes no sense at all. Your conclusion is completely wrong. Klaus85 replies | 2806 view(s)
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3rd April 2020, 07:00KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, Press the "one shot" button at the scope. Klaus85 replies | 2806 view(s)
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3rd April 2020, 00:16KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, You still repeat not to strictly follow the recommendations. You modify the circuit, you modify the part values... 1) May I ask why you used...85 replies | 2806 view(s)
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2nd April 2020, 09:34KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, I clearly talked about the "resistor to measure the current" and wrote it should be not higher than 10 Ohms. * but you removed all the...85 replies | 2806 view(s)
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2nd April 2020, 09:14KlausST replied to a thread water flow detection in a pipe in Hobby Circuits and Small Projects ProblemsHi, good idea, Brian. Speed of sound in water is about 1500m/s. if there is water flow, then in one direction the speed of water flow adds to...6 replies | 368 view(s)
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2nd April 2020, 08:47Hi, My hint: dBm refers to 1mW. Now you want to refer it to the voltage on a 50 Ohms resistor. This leads to the question: How much...3 replies | 248 view(s)
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2nd April 2020, 08:33KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, Yes, luck. Sadly luck, because it seemed you forgot all we tried to teach you. Designing electronics has nothing to do with luck. Itīs...85 replies | 2806 view(s)
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2nd April 2020, 07:59KlausST replied to a thread water flow detection in a pipe in Hobby Circuits and Small Projects ProblemsHi, Yes, for sure. Everybody wants this. :-) Then it's time to invent it. Do you have an idea? Let's say I have an idea, then I need a...6 replies | 368 view(s)
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2nd April 2020, 01:29KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, From post#55: But you inverted both! Regarding the resistor to measure the current. The resistor value should be low, low enough not...85 replies | 2806 view(s)
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1st April 2020, 21:15KlausST replied to a thread Enable circuit for backup battery boost converter in Analog Circuit DesignHi, Add two resistors an NPN BJT. Two resistors as voltage divider from 8V Center of divider to bjt_base Bjt emitter to GND Bjt collector to...3 replies | 246 view(s)
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1st April 2020, 06:46Hi, The voltage of the capacitor is also limited by the available energy. E = 0.5 Ũ V Ũ V Ũ C --> V = sqrt( 2 E / C) When the energy comes...10 replies | 360 view(s)
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1st April 2020, 06:31KlausST replied to a thread PIC16F877 interface with ds1307 ...RTC running 10 sec slow in MicrocontrollersHi, Honestly, I see absolutely no use in simulating the accuracy of an RTC. Simply trust the datasheet. The datsheet specifications should be...12 replies | 649 view(s)
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31st March 2020, 23:29Hi, You mean a MOSFET? N-channel or P-channel? Draw a schematic (hand drawn) of your idea. What does "it doesn't work as expected" exactly...2 replies | 225 view(s)
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31st March 2020, 20:03KlausST replied to a thread How to convert CMRR in DB to Numerical Value in Professional Hardware and Electronics DesignHi, What about doing an internet search on your own: "online dB calculator"... Klaus3 replies | 219 view(s)
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31st March 2020, 19:07KlausST replied to a thread Circuit with an integrated FLIP FLOP in Hobby Circuits and Small Projects ProblemsHi, "my first approach" of post#3 should give all you need to know. If not, then do an internet search with the given informations. Klaus13 replies | 641 view(s)
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31st March 2020, 07:07KlausST replied to a thread BMS Circuit design using a BMS IC. in Analog Integrated Circuit (IC) Design, Layout and FabricationHi, All we could do is an internet research...the only useful information we have is "10S" or "20S". So it's a rather unelaborated question. ...1 replies | 194 view(s)
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31st March 2020, 06:55Hi, If I had to debug it I'd use a scope to see the signals. With it you exactly see the signals on the bus...you are able to detect software...20 replies | 809 view(s)
About KlausST
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