KlausST
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Yesterday, 20:17Hi, Why the zeners across GS? The drive voltage is 15Vmax and the Mosfets can widthstand 20V. I see no reason for the zeners ... also zeners...5 replies | 202 view(s) -
Yesterday, 19:36Hi, I can't open a .rar file on my tablet... Klaus5 replies | 202 view(s)
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Yesterday, 16:15Hi, a common mode choke may be very high impedance for common mode signals, but it may be very low impedance for differential mode signals. You...3 replies | 131 view(s)
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14th December 2019, 19:49Hi, Thanks a lot for this ... But first you need to give all your informations: (for sure also - as soon as possible ;-)) * complete...11 replies | 728 view(s)
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14th December 2019, 10:36Hi, With "input" I meant the signal in your circuit that is marked "Vin". And yes it goes to the inverting input of the amp. Note: In your...10 replies | 380 view(s)
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14th December 2019, 09:03KlausST replied to a thread White residue after solder mask develope!!! in Miscellaneous EngineeringHi, What exactly do you mean? Add some marks on the pictures. Klaus3 replies | 210 view(s)
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13th December 2019, 22:00Hi, Yes you miss the characteristic impedance. You just need to drive the 75 Ohms of the cable impedance, that's it. This already includes the...8 replies | 328 view(s)
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13th December 2019, 16:12KlausST replied to a thread [SOLVED] Transformers on a PCB in Hobby Circuits and Small Projects ProblemsHi, No! Repeated: Klaus10 replies | 451 view(s)
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13th December 2019, 16:07Hi you missed the brackets: ((5V7-V_in-v_d1)*R2/(R1+R2))/R2 then you may simplify it: --> ((5V7-V_in-v_d1)*R2/(R1+R2))/R2 -->...4 replies | 245 view(s)
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13th December 2019, 15:38KlausST replied to a thread [SOLVED] Transformers on a PCB in Hobby Circuits and Small Projects ProblemsHi, We are talking about HF. Thus this still is far away from being a GND plane. All the traces have the same length as before ... and for HF...10 replies | 451 view(s)
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13th December 2019, 15:20Hi, hard to say without values. I guess 300 uA. No - joke aside. do you really want us to go give you a mathematical solution for all cases...4 replies | 245 view(s)
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13th December 2019, 12:34KlausST replied to a thread [SOLVED] Transformers on a PCB in Hobby Circuits and Small Projects ProblemsHi, It does not depend on whether your circuit produces HF or not, it depends whether your circuit reacts on HF. And this depends on what exactly...10 replies | 451 view(s)
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13th December 2019, 12:23Hi, we have more modern ones like JBC for example, but I can see no benefit against the "old ones". They claim about longer tip liefetime - but...7 replies | 328 view(s)
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13th December 2019, 12:06Hi, according ohm´s law. 5V input will give 50uA, this is half of 100uA. So this should be linear. Nobody can tell whether your meter works...6 replies | 176 view(s)
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13th December 2019, 10:24Hi, In our company we design multilayer PCB, do prototype soldering, rework, repair, low volume production. In our whole company we only have...7 replies | 328 view(s)
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13th December 2019, 09:29KlausST replied to a thread PROCESSOR IS REBOOTING when hotplugging usb console to processor's Board through UART in Professional Hardware and Electronics DesignHi, I didn't talk about "onboard" either... Before you just talked about a laptop and FTDI....but now I have to assume it's not the laptop...4 replies | 239 view(s)
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13th December 2019, 08:32KlausST replied to a thread PROCESSOR IS REBOOTING when hotplugging usb console to processor's Board through UART in Professional Hardware and Electronics DesignHi, You talk about RS232 signal lines. But I think the signal lines do not cause the problem. I'm even not sure if it's a hardware problem at...4 replies | 239 view(s)
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13th December 2019, 08:19Hi, There are still a lot if issues..already discussed. A new one is Q5. What does it do? It disconnects GND to U1 in a live system. GND is...24 replies | 890 view(s)
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13th December 2019, 01:14Hi, Do the timings really make sense? * discharging C_Hold typicaly takes a microsecond or so, discharging it for 250us won't do anything.. *...3 replies | 224 view(s)
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12th December 2019, 18:42Hi, A2 has a defined gain of -1, thus it should work. A1 has an input impedance of 1600 Ohms @ 1kHz (C7). This causes a gain of -32 @ 1kHz. But...10 replies | 380 view(s)
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12th December 2019, 16:22Hi, I think the circuit could work. But why do you use a pulse input ... of that high magnitude.? --> Use a sine shape waveform of 1kHz and...10 replies | 380 view(s)
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12th December 2019, 08:49Hi, Why not simply switching low side = GND of the peltier? Why not using a dedicated Highside_switch? Why not using standard P_channel circuits...24 replies | 890 view(s)
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12th December 2019, 08:44KlausST replied to a thread Supercap charging using load switch and current limit resistor in Analog Circuit DesignHi, Yes. Turn ON starts at about 1.8V, but one can not see this, becayse the signal is chip internal. But after the turn ON delay you see the...1 replies | 103 view(s)
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12th December 2019, 00:11Hi, "keyboard" has many meanings. Please clarify which one you mean. And describe the expected function. Example: computer keyboard. Do you...2 replies | 279 view(s)
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11th December 2019, 23:54KlausST replied to a thread How to access Micron MT25Q nor flash in Embedded Linux and Real-Time Operating Systems (RTOS)Hi, A lot of text, no clear question, not much we can verify... Please give * (a link to) the datasheet * your code * the scope picture *...4 replies | 408 view(s)
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11th December 2019, 11:22Hi, Do you think you find a single person in this forum who does not think reading documents is boring? There´s no way around. Klaus8 replies | 500 view(s)
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11th December 2019, 11:15Hi Then you don´t need to accumulate something, you just need to measure the phase difference. If phase difference is 5us --> show 5us (= "1"...12 replies | 462 view(s)
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11th December 2019, 09:18Hi, What about a sketch and/or timing diagram? "Phase should be accumulated", means:at the beginning, if phase is 5us then the result is "5us"...12 replies | 462 view(s)
About KlausST
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- Digital Signal Processing, Microcontrollers, Power Electronics
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