barry
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8th November 2019, 15:53The amplifier is obviously unstable. But is it because of the plane? Perhaps the additional capacitance of the plane is the problem. You need to...5 replies | 316 view(s)
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5th November 2019, 20:20barry replied to a thread [SOLVED] How to generate a sine waveform using a STM32 Nucleo-64? in MicrocontrollersYou can also generate a sinewave with a lookup table and counter (DDS). You don't have to use rational functions. But that 1MHz DAC will be a...4 replies | 223 view(s)
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5th November 2019, 16:39I, for one, never use separate clocked/combinational process for state machines. I know all the literature says this is the way to do it, but I find...6 replies | 225 view(s)
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5th November 2019, 16:36barry replied to a thread [SOLVED] How to generate a sine waveform using a STM32 Nucleo-64? in MicrocontrollersYou're going to have a pretty rough sinewave since the maximum sampling frequency you can have is 48MHz. (Not even sure if the onboard DAC can run at...4 replies | 223 view(s)
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5th November 2019, 16:23You need to have "count<=count+"01" in a clocked process, not a combinational process. And have you included ieee.numeric_std? Have you observed...6 replies | 225 view(s)
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5th November 2019, 02:16I disagree. If there is ANY optimization, your intermediate sum, "a+b", is going to be optimized away. If you keep that intermediate sum for the sole...7 replies | 455 view(s)
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4th November 2019, 20:28barry replied to a thread Properties of material ( silver and copper ) in Electromagnetic Design and SimulationALL the properties? Maybe you could narrow it down a bit; like electrical properties or mechanical or chemical properties or crystal structure or...2 replies | 218 view(s)
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3rd November 2019, 22:13barry replied to a thread NPN having its VBE protected against reverse voltage....but unecessary? in Analog Circuit DesignI suppose if the output (emitter) is sitting at some positive voltage and the opamp output suddenly went to zero you’d have a reverse bias. But why...21 replies | 594 view(s)
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31st October 2019, 14:58I'm not really a C guy, but that is not a function, it's a structure. Two totally different things. Look it up.10 replies | 403 view(s)
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30th October 2019, 14:44The phase of the PLL is relative, either to its input clock or a secondary output clock. Once you route those signals, with no constraints, there’s...4 replies | 325 view(s)
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30th October 2019, 06:01This is NOT a good method. What may work for one build may not work for the next. Change one little thing and the routing can change completely and...4 replies | 325 view(s)
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29th October 2019, 23:59And then there's that talking Dutch pot cover... Sleep well.9 replies | 539 view(s)
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29th October 2019, 21:53What? WHAT??? I understand the first part of your question; the second part, not at all. You could use a simple microprocessor to provide the...9 replies | 539 view(s)
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29th October 2019, 14:40barry replied to a thread Connect 32 serial lines to uC (eg. ESP32) over I2C or SPI? in Digital communicationIt’s sounding more and more like you should use an FPGA. What you’re proposing, daisy-chained uCs, 9bit UARTS, etc. just sounds like a nightmare to...16 replies | 582 view(s)
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28th October 2019, 18:55barry replied to a thread Connect 32 serial lines to uC (eg. ESP32) over I2C or SPI? in Digital communicationWell, maybe now is the perfect time to learn about FPGAs! There are megatons of information about FPGAs out there. Try one of the vendor sites...16 replies | 582 view(s)
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28th October 2019, 17:50barry replied to a thread [SOLVED] filtering a output of xor-ed signal in Elementary Electronic QuestionsDepending on your design, those glitches may not be a problem at all. Or they may. You don't tell us anything about your design other than there's an...9 replies | 391 view(s)
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28th October 2019, 15:41barry replied to a thread Connect 32 serial lines to uC (eg. ESP32) over I2C or SPI? in Digital communicationEither you need all 32 channels active at the same time, or you don't. You seem to be unsure about this. Personally, I'd probably just do this in an...16 replies | 582 view(s)
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28th October 2019, 15:36Let me answer your question with a question: Your net delay is greater than your logic delay; so what? Does your design meet timing? If so, don't...6 replies | 269 view(s)
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28th October 2019, 14:39barry replied to a thread [SOLVED] filtering a output of xor-ed signal in Elementary Electronic QuestionsYou have discovered the reason for using synchronous (clocked ) signals. When you have both signals transitioning simultaneously, there will be...9 replies | 391 view(s)
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27th October 2019, 11:33A lot of undefined parameters... Do you want to stream sound in real-time or send sound files? What frequency range? How accurate? Compressed?3 replies | 301 view(s)
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27th October 2019, 00:52How can you be both unfamiliar with circuit design and still able to design simple circuits? How do you know its working? Your picture of your...12 replies | 569 view(s)
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26th October 2019, 23:19Absurd. I cannot explain how it is working because I don't believe it IS working.12 replies | 569 view(s)
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26th October 2019, 21:50Dude, you are all over the place. To quote your original post, in case you forgot, "I am not familiar with circuit designing". Your resistors do, in...12 replies | 569 view(s)
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26th October 2019, 20:06If you're admittedly not familiar with circuit design you should, maybe, LEARN something about circuit design before you just randomly throw some...12 replies | 569 view(s)
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26th October 2019, 14:17barry replied to a thread Need a Paper: Electronic Circuit Diagnosis with No Data in Analog Circuit DesignHuh? You can buy it right from the website. Do you want someone to buy it for you?3 replies | 311 view(s)
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24th October 2019, 14:14Why would you post a complaint about others’ spelling errors when your own post is filled with errors in punctuation, capitalization, grammar and...4 replies | 645 view(s)
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23rd October 2019, 17:05RX of device to TX of MCU and TX of device to RX of MCU. I'm not really sure I understand your question.3 replies | 268 view(s)
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23rd October 2019, 15:39It depends on what you want your design to do. WE sure don't know. RTS and CTS are handshaking signals. Maybe you need them. Maybe you don't. Are...3 replies | 268 view(s)
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22nd October 2019, 15:34barry replied to a thread Rigid flex Cross section OrCAD PCB Designer in PCB Routing Schematic Layout software and SimulationMaybe, just maybe, you should tell us what software you are using. Showing a picture of the dialog for selecting layer colors is useless. Maybe you...12 replies | 973 view(s)
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21st October 2019, 19:21Why do you say: "The 820 of course tells me the value of the res"? Maybe the 820 tells you reference designator and 1K is actually the value. Maybe...3 replies | 260 view(s)
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