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KlausST
KlausST
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17th April 2014
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22:10
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Analog Design Engineer
AVR Microcontroller
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Power Electronics
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Today,
19:26
KlausST
replied to a thread
Embedded project needs devices which can work continuously at +125 degree C
in
Microcontrollers
Hi, No problem. Itīs just useless. Klaus
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70 replies | 1848 view(s)
Today,
19:24
KlausST
replied to a thread
How to measure current with a digital oscilloscope?
in
Power Electronics
Hi, How Iīd do it: Resistor I canīt see why you canīt use it. Tell us more about it. alternatively: use a current probe. Klaus
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1 replies | 59 view(s)
Today,
18:26
KlausST
replied to a thread
3.7V lithium ion battery charger
in
Analog Circuit Design
Hi, Please keep in mind: The generated heat will always be the same. LM317 with / wihtou pass transistor, or any resistor solution or any other...
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2 replies | 55 view(s)
Today,
17:36
KlausST
replied to a thread
Troubles with latched counter
in
PLD, SPLD, GAL, CPLD, FPGA Design
Hi, I didnīt go through the complete thread. But it seems you are doing some frequency measurement. For this you use a "gate" time of 100us....
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17 replies | 261 view(s)
Today,
17:24
KlausST
replied to a thread
Embedded project needs devices which can work continuously at +125 degree C
in
Microcontrollers
Hi, No, because the HC138 outputs are push/pull and never high-Z. Klaus
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70 replies | 1848 view(s)
Today,
17:16
KlausST
replied to a thread
Voltage Drop Issue across Diode Bank.
in
Analog Circuit Design
Hi, Mind: itīs not (like expectable) "Max forward voltage vs forward current" it says: "max. forward current vs forward voltage". It is the...
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4 replies | 79 view(s)
Today,
13:48
KlausST
replied to a thread
Stepper motor doesn't have a brand or model number!
in
Elementary Electronic Questions
Hi, I canīt see how you want to connect it nor how it can work. Can you draw a schematic? Klaus
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13 replies | 326 view(s)
Today,
13:45
KlausST
replied to a thread
Voltage Drop Issue across Diode Bank.
in
Analog Circuit Design
Hi, I assume you did not read the diodeīs datasheet. According your measurement you get 3V across 30 Ohms --> 0.1A. Now use Figure 7 of the...
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4 replies | 79 view(s)
Yesterday,
20:32
David_
replied to a thread
Simplest way of converting 240Vrms mains into 450VDC?
in
Power Electronics
This is for a single-phase motor(fan). I have been thinking about voltage doubler directly at the mains but I don't know math good enough to be...
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12 replies | 428 view(s)
Yesterday,
18:37
KlausST
replied to a thread
Opamp slew rate measurment
in
Analog Circuit Design
Hi, Instead of "somewhere" I recommend to look for such informations at the OPAMP manufacturers. They write the specifications and they can tell...
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3 replies | 105 view(s)
Yesterday,
07:57
KlausST
replied to a thread
Choice between Buck and Regulator
in
Elementary Electronic Questions
Hi, There are overvoltage protection devices as well as overvoltage protection circuits. Just do an internet search. My recommendation still...
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7 replies | 101 view(s)
Yesterday,
07:54
KlausST
replied to a thread
Is Raspberry Pi is better than Arduino?
in
IoT - Internet of Things
Hi, Raspberry Pi is a computer. There are different types. If you want to compare it, then you should give the exact type. Arduino is an IDE....
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5 replies | 187 view(s)
Yesterday,
07:45
KlausST
replied to a thread
Choice between Buck and Regulator
in
Elementary Electronic Questions
Hi, --> the part does not need 5V. It may be supplied with 3.3V. Klaus
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7 replies | 101 view(s)
Yesterday,
07:43
KlausST
replied to a thread
Stepper motor doesn't have a brand or model number!
in
Elementary Electronic Questions
Hi, If I understand correctly, then you don't have any specification of the motor. --> What makes you think that it is rated for 12V? If the...
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13 replies | 326 view(s)
Yesterday,
07:35
KlausST
replied to a thread
Choice between Buck and Regulator
in
Elementary Electronic Questions
Hi, Your informations are confusing. The max. rated input voltage of a buck converter does not depend on output voltage. (unless you use...
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7 replies | 101 view(s)
17th February 2019,
19:13
KlausST
replied to a thread
Circuit for NPP-301A 100PSI IC (Pressure sensor) combined with MAX1472 RF Transmitter
in
Hobby Circuits and Small Projects Problems
Hi, Your question is too general. We can't design all the apllication for you (and we don't want to). --> draw a flow chart. Divide your...
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3 replies | 145 view(s)
17th February 2019,
19:01
KlausST
replied to a thread
PIC18F and PWM problem
in
Microcontrollers
Hi, My idea: It's a measurement problem - and no real problem. It is called "alias frequency" when the sampling rate is less than double of...
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4 replies | 148 view(s)
17th February 2019,
18:54
KlausST
replied to a thread
RF Detector not detecting cellular phones
in
RF, Microwave, Antennas and Optics
Hi, I have to agree with Brian. I also find it hard where to begin. Like this comment or not: it is no HF design. I can see any design at...
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24 replies | 795 view(s)
17th February 2019,
18:19
KlausST
replied to a thread [SOLVED]
Reed solomon encoder in vhdl
in
PLD, SPLD, GAL, CPLD, FPGA Design
Hi, Makes no sense to me. You don't show the tiniest effort of your own. We don't see what you have done so far. --> Do a simple internet...
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5 replies | 183 view(s)
17th February 2019,
18:01
KlausST
replied to a thread [SOLVED]
Reed solomon encoder in vhdl
in
PLD, SPLD, GAL, CPLD, FPGA Design
Hi, It seems you misunderstood how a forum works. It is not meant that others do your job. It is meant that you do your job and if you...
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5 replies | 183 view(s)
17th February 2019,
11:37
KlausST
replied to a thread
Op-amp design to use in 8 bit R-2R ladder DAC
in
Analog Circuit Design
Hi, What about an internet search " R 2R DAC schematic" ? Klaus
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6 replies | 178 view(s)
17th February 2019,
11:35
KlausST
replied to a thread
Phase shifted pwm using stm32f103
in
Power Electronics
Hi, Now I'm confused. This sentence clearly says you want two triangular waveforms...--> I assume this is not possible without additional...
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3 replies | 170 view(s)
17th February 2019,
08:37
KlausST
replied to a thread
ESD problem solved by using aluminium covered floor tiles?
in
Elementary Electronic Questions
Hi, You may see it like this: * The person is one electrode of a capacitor. * the other electrode is the floor, the walls, any other - even...
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17 replies | 265 view(s)
17th February 2019,
08:18
KlausST
replied to a thread
Op-amp design to use in 8 bit R-2R ladder DAC
in
Analog Circuit Design
Hi, A R-2R DAC may be built without Opamp, but it has relatively high ohmic output. And relative low ohmic reference input. You should be...
see more
6 replies | 178 view(s)
16th February 2019,
23:01
KlausST
replied to a thread
Stepper motor doesn't have a brand or model number!
in
Elementary Electronic Questions
Hi, The torque depends on current. No current, low torque, just caused by the magnetic remanence. Klaus
see more
13 replies | 326 view(s)
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