betwixt
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Yesterday, 09:14betwixt replied to a thread cooler master silent prp 500w pc psu in Service Manuals, Requests, Repair TipsThere is a "prp 500W" which is a power inverter and there is a "pro 500w" which is a modular PC power supply. I'm guessing from the title this...3 replies | 123 view(s)
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Yesterday, 09:07I'm not sure I understand the question. The algorithm is the same regardless of the format the digits are presented. I think this is written in...3 replies | 163 view(s)
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28th May 2020, 18:40The HTML to PHP interface says everything after the '?' is passed to the interpreter and the '&' delimits individual parameters. There is nothing...15 replies | 2629 view(s)
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28th May 2020, 14:46I looked at the link, it very clearly shows a white 'strirrer' in the bottom of the flask and it even 'explodes' the base contents where you can see...3 replies | 252 view(s)
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28th May 2020, 09:18A far better alternative would be to buy a Raspberry Pi, the cost is almost the same and you get a more modern HDMI connection for A/V as well as...6 replies | 291 view(s)
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28th May 2020, 09:04betwixt replied to a thread Yes-Circuit: Misunderstood or malfunction in Hobby Circuits and Small Projects ProblemsBe careful, transistors can be damaged by swapping their connections over and they will only work when wired correctly. What Audioguru said is...4 replies | 213 view(s)
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27th May 2020, 10:41betwixt replied to a thread Yes-Circuit: Misunderstood or malfunction in Hobby Circuits and Small Projects ProblemsYour language skills are perfect! From what I can see, you have built it correctly and the values look good. If pressing the button makes the...4 replies | 213 view(s)
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26th May 2020, 22:22I think we need to see how it connects to your circuit. The answer to your problem depends on whether the sensor side is connected so it lifts the...2 replies | 221 view(s)
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26th May 2020, 16:07A small disk with a fin or a small propeller sit in the bottom of the glass. In the base there is a small motor spinning a magnet around. The...3 replies | 252 view(s)
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26th May 2020, 13:23betwixt replied to a thread Circuit don't work in Microcap (555-based class-D) in Elementary Electronic QuestionsDon't expect particularly good results from that circuit. In astable mode the control pin can change the frequency as much as the pulse width and...6 replies | 406 view(s)
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26th May 2020, 08:46betwixt replied to a thread Questions about the components in a circuit (metal piece) in Elementary Electronic QuestionsMost likely a negative ion source. Some 'purifiers' generate small levels of ozone, claiming it makes the air purer although more likely it...1 replies | 142 view(s)
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25th May 2020, 22:24Wouldn't this do the same thing: delay(((rand() % 6) * 1000); Brian.5 replies | 315 view(s)
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24th May 2020, 22:53The resistor and LED seem OK but what is the supply voltage (VDD) to the PIC. It needs to be a little higher than the LED needs to allow for some...7 replies | 421 view(s)
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24th May 2020, 15:37Are you sure? 1 << (twint) shifts a '1' left by '(twint)' times, it creates a value but does it change the contents of a register? Brian.6 replies | 293 view(s)
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24th May 2020, 14:16betwixt replied to a thread Measuring voltage drop across a diode in a switching circuit in Elementary Electronic QuestionsSo if you did this: (forgive the crude graphics) +8V ------ Diode ------- (no connection) 0V ---------------------------------------- And you...6 replies | 364 view(s)
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24th May 2020, 09:52betwixt replied to a thread Measuring voltage drop across a diode in a switching circuit in Elementary Electronic QuestionsOnly when the diode is conducting and passing enough current. If the voltage can't drop below 7.7V after the diodes it probably means there is...6 replies | 364 view(s)
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23rd May 2020, 21:33betwixt replied to a thread Variable Resistor clamping and output behaviour for LM2596-ADJ in Power ElectronicsI've never seen a regulator that takes it's feedback from the input voltage! I suspect R36 should go to ground instead of the input. To get the...4 replies | 293 view(s)
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23rd May 2020, 08:41betwixt replied to a thread Will a filter block this waveform? in Hobby Circuits and Small Projects ProblemsI think the bottom line is this: If you want a clean 40MHz signal it is best to generate one as near a sine wave as possible then use minimal...25 replies | 687 view(s)
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23rd May 2020, 08:29That suggests you are becoming part of the signal path. Can you check that the PSU you are using really has a ground connection. There should be one...17 replies | 670 view(s)
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22nd May 2020, 22:51Only that there is no frequency modulation on the carrier. When receiving in CW mode you probably wouldn't hear very low frequencies because of the...17 replies | 670 view(s)
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22nd May 2020, 22:42You are not noticing the resistor symbols on the diagram. The pull-up and pull-down are not direct connections to VDD or VSS, they enable a weak...2 replies | 164 view(s)
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22nd May 2020, 18:59betwixt replied to a thread Will a filter block this waveform? in Hobby Circuits and Small Projects ProblemsNot necessarily, but probably. If the module produced a pure sine wave output it would not have any harmonics. A sine wave is a single frequency. If...25 replies | 687 view(s)
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22nd May 2020, 18:49betwixt replied to a thread RFID Transponder transmission and reception working in RF, Microwave, Antennas and OpticsA bit over simplified but this will give you the general idea: In RFID systems, the transmitter sends pulses at the chosen frequency, it also...1 replies | 136 view(s)
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22nd May 2020, 18:34betwixt replied to a thread Will a filter block this waveform? in Hobby Circuits and Small Projects ProblemsDoes not compute Will Robinson. (with apologies to 'Lost in space' fans). A crystal oscillator generally can't be used for FM transmission. I'm...25 replies | 687 view(s)
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22nd May 2020, 14:46It is a pointer, usually to a structure member. Brian.12 replies | 400 view(s)
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22nd May 2020, 14:07You sent us three fragments of mystery code with only one comment between them. We don't stand a chance of working out what is wrong if we don't...1 replies | 157 view(s)
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22nd May 2020, 14:02Standard C language. The '|' means logic OR. The '=' means 'becomes' in this context. '|=' means the left value becomes itself OR'ed with the...12 replies | 400 view(s)
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22nd May 2020, 11:57Sounds like a ground hum loop to me then. There is a difference in voltage between your audio input ground and the LM317 ground. You should have a...17 replies | 670 view(s)
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20th May 2020, 21:56betwixt replied to a thread Dont need a super accurate, super high bandwidth In Amp... in Analog Circuit DesignCan't you just scale the two voltages and feed them differentially to the two amps inputs, one with low gain (or unity) to give the difference and...6 replies | 352 view(s)
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