KlausST
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Today, 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...1 replies | 38 view(s) -
Today, 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...3 replies | 119 view(s)
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Today, 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)...80 replies | 2626 view(s)
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Yesterday, 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. Klaus80 replies | 2626 view(s)
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Yesterday, 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. Klaus80 replies | 2626 view(s)
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Yesterday, 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...80 replies | 2626 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...80 replies | 2626 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 | 328 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 | 227 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. It´s...80 replies | 2626 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 | 328 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...80 replies | 2626 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 | 228 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 × V × V × C --> V = sqrt( 2 E / C) When the energy comes...10 replies | 322 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 | 631 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 | 214 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 | 214 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. Klaus12 replies | 552 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 | 186 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 | 787 view(s)
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31st March 2020, 06:19Hi, There is no best solution. * no free pins at all * internal pullup / pulldiwn * programmable pullup / pulldown * keeper * external...5 replies | 417 view(s)
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30th March 2020, 21:01KlausST replied to a thread computer parallel port external relay control in Hobby Circuits and Small Projects ProblemsHi, The only question of post#1 is Klaus9 replies | 472 view(s)
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30th March 2020, 17:09Hi, my recommendation: Read the datasheets. Both datasheets specify accuracy. At least this is the way I`d do it. Klaus12 replies | 447 view(s)
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30th March 2020, 16:58KlausST replied to a thread Circuit with an integrated FLIP FLOP in Hobby Circuits and Small Projects ProblemsHi, can you please draw a truth table, your 1) violates your 2) --> I assume: when pinA = 1 and pinB = 1: do nothing = hold mode = no change...12 replies | 552 view(s)
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30th March 2020, 13:09Hi, This all makes no sense to me. --> Show a sketch/circuit about your idea. Klaus5 replies | 305 view(s)
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30th March 2020, 11:49Hi, This circuit makes more sense: It differs to the first one: * Now there is no capacitor beween A nd C of the LED. It is between pin2 and...5 replies | 305 view(s)
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30th March 2020, 11:12Hi, this is an inclomplete circuit. I don´t think it is correct. It does not make sens to discuss abut an incomplete circuit. Where is it from?...5 replies | 305 view(s)
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30th March 2020, 00:55KlausST replied to a thread Where to get schematics about SCRs full-wave triggering circuits ? in Power ElectronicsHi, As already mentioned: You don't measure the gate current. --> If you want to know the gate current, then measure the gate current. ...80 replies | 2626 view(s)
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