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KlausST
KlausST
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17th April 2014
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Yesterday,
20:17
KlausST
replied to a thread
IR2130 problems in Proteus
in
Analog Circuit Design
Hi, 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...
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5 replies | 192 view(s)
Yesterday,
19:36
KlausST
replied to a thread
IR2130 problems in Proteus
in
Analog Circuit Design
Hi, I can't open a .rar file on my tablet... Klaus
see more
5 replies | 192 view(s)
Yesterday,
16:15
KlausST
replied to a thread
Coupled inductors for filtering
in
Power Electronics
Hi, 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...
see more
3 replies | 114 view(s)
14th December 2019,
19:49
KlausST
replied to a thread
What is default slave address for the ACS71020
in
Microcontrollers
Hi, Thanks a lot for this ... But first you need to give all your informations: (for sure also - as soon as possible ;-)) * complete...
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11 replies | 715 view(s)
14th December 2019,
10:36
KlausST
replied to a thread
What's the rpoblem of this MIC circuits?
in
Analog Circuit Design
Hi, 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...
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10 replies | 368 view(s)
14th December 2019,
09:03
KlausST
replied to a thread
White residue after solder mask develope!!!
in
Miscellaneous Engineering
Hi, What exactly do you mean? Add some marks on the pictures. Klaus
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3 replies | 196 view(s)
13th December 2019,
22:00
KlausST
replied to a thread
Coaxial cable capacitance
in
Elementary Electronic Questions
Hi, 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...
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8 replies | 311 view(s)
13th December 2019,
16:12
KlausST
replied to a thread [SOLVED]
Transformers on a PCB
in
Hobby Circuits and Small Projects Problems
Hi, No! Repeated: Klaus
see more
10 replies | 435 view(s)
13th December 2019,
16:07
KlausST
replied to a thread [SOLVED]
how to calculate ib of PNP
in
Mathematics and Physics
Hi 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 -->...
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4 replies | 236 view(s)
13th December 2019,
15:38
KlausST
replied to a thread [SOLVED]
Transformers on a PCB
in
Hobby Circuits and Small Projects Problems
Hi, 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...
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10 replies | 435 view(s)
13th December 2019,
15:20
KlausST
replied to a thread [SOLVED]
how to calculate ib of PNP
in
Mathematics and Physics
Hi, 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...
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4 replies | 236 view(s)
13th December 2019,
12:34
KlausST
replied to a thread [SOLVED]
Transformers on a PCB
in
Hobby Circuits and Small Projects Problems
Hi, 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...
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10 replies | 435 view(s)
13th December 2019,
12:23
KlausST
replied to a thread
Soldering Iron recommendations
in
Elementary Electronic Questions
Hi, 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...
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7 replies | 315 view(s)
13th December 2019,
12:06
KlausST
replied to a thread
0-100uA analogue meter (needle) to show 0-10v
in
Analog Circuit Design
Hi, 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...
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6 replies | 173 view(s)
13th December 2019,
10:24
KlausST
replied to a thread
Soldering Iron recommendations
in
Elementary Electronic Questions
Hi, In our company we design multilayer PCB, do prototype soldering, rework, repair, low volume production. In our whole company we only have...
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7 replies | 315 view(s)
13th December 2019,
09:29
KlausST
replied to a thread
PROCESSOR IS REBOOTING when hotplugging usb console to processor's Board through UART
in
Professional Hardware and Electronics Design
Hi, 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...
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4 replies | 230 view(s)
13th December 2019,
08:32
KlausST
replied to a thread
PROCESSOR IS REBOOTING when hotplugging usb console to processor's Board through UART
in
Professional Hardware and Electronics Design
Hi, 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...
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4 replies | 230 view(s)
13th December 2019,
08:19
KlausST
replied to a thread
[PIC] Car Cooling System PSU Design Related
in
Microcontrollers
Hi, 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...
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24 replies | 879 view(s)
13th December 2019,
01:14
KlausST
replied to a thread
Simple ADC code in XC8 for PIC16F18856
in
Microcontrollers
Hi, Do the timings really make sense? * discharging C_Hold typicaly takes a microsecond or so, discharging it for 250us won't do anything.. *...
see more
3 replies | 224 view(s)
12th December 2019,
18:42
KlausST
replied to a thread
What's the rpoblem of this MIC circuits?
in
Analog Circuit Design
Hi, 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...
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10 replies | 368 view(s)
12th December 2019,
16:22
KlausST
replied to a thread
What's the rpoblem of this MIC circuits?
in
Analog Circuit Design
Hi, 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...
see more
10 replies | 368 view(s)
12th December 2019,
08:49
KlausST
replied to a thread
[PIC] Car Cooling System PSU Design Related
in
Microcontrollers
Hi, Why not simply switching low side = GND of the peltier? Why not using a dedicated Highside_switch? Why not using standard P_channel circuits...
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24 replies | 879 view(s)
12th December 2019,
08:44
KlausST
replied to a thread
Supercap charging using load switch and current limit resistor
in
Analog Circuit Design
Hi, 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...
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1 replies | 101 view(s)
12th December 2019,
00:11
KlausST
replied to a thread
automated physical keystroker
in
Mechanical Engineering and Design
Hi, "keyboard" has many meanings. Please clarify which one you mean. And describe the expected function. Example: computer keyboard. Do you...
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2 replies | 273 view(s)
11th December 2019,
23:54
KlausST
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 *...
see more
4 replies | 402 view(s)
11th December 2019,
11:22
KlausST
replied to a thread [SOLVED]
problem with coding 123
in
Microcontrollers
Hi, Do you think you find a single person in this forum who does not think reading documents is boring? There´s no way around. Klaus
see more
8 replies | 497 view(s)
11th December 2019,
11:15
KlausST
replied to a thread
Tracking Phase comparator Logic
in
PLD, SPLD, GAL, CPLD, FPGA Design
Hi Then you don´t need to accumulate something, you just need to measure the phase difference. If phase difference is 5us --> show 5us (= "1"...
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12 replies | 457 view(s)
11th December 2019,
09:18
KlausST
replied to a thread
Tracking Phase comparator Logic
in
PLD, SPLD, GAL, CPLD, FPGA Design
Hi, 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"...
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12 replies | 457 view(s)
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About KlausST
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Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.
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