betwixt
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Today, 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 | 163 view(s)
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Today, 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 | 229 view(s)
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Today, 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 | 189 view(s)
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Yesterday, 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 | 189 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 | 177 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 | 163 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 | 356 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 | 125 view(s)
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25th May 2020, 22:24Wouldn't this do the same thing: delay(((rand() % 6) * 1000); Brian.5 replies | 276 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 | 383 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 | 282 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 | 342 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 | 342 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 | 274 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 | 662 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 | 643 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 | 643 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 | 153 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 | 662 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 | 130 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 | 662 view(s)
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22nd May 2020, 14:46It is a pointer, usually to a structure member. Brian.12 replies | 374 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 | 146 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 | 374 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 | 643 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 | 338 view(s)
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20th May 2020, 20:31My thoughts exactly FvM. That and because the same device running as a high power oscillator has to work in linear mode as well. Even the idea of...12 replies | 537 view(s)
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20th May 2020, 18:08betwixt replied to a thread Problem with current loss with increasing length of wire in Hobby Circuits and Small Projects ProblemsThe only option is to use thicker wires I'm afraid. The voltage drop is caused by the resistance of the wire (Voltage drop = Current * Wire...7 replies | 550 view(s)
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20th May 2020, 11:57You are getting the idea! The best you could achieve with the present circuit is a 50% reduction in power usage because as you now realize, the...12 replies | 537 view(s)
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