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  1. Learner

    Help needed on electronic relay LH1500AT

    Hi guys, I was wondering if anyone knows what the DC pin is for and stands for? I've tried to asked Vishay tech support unfortunately there was no reply.... Data sheet can be found here https://www.ortodoxism.ro/datasheets/vishay/83804.pdf Thank you for your help!
  2. Learner

    Millitary part no. crossreference

    Does anyone know how I can find out the equivalent commercial part number of a millitary part number?
  3. Learner

    Coupled inductor question

    coupled inductor equation Hi everyone, I was wondering if someone could help me figure the state space equation for this circuit, according to the coupled inductor equation V1 = L1 di1/dt - M di2/dt V2 = -M di1/dt + L2 di2/dt which gives me V1 = 1 di1/dt - 1/2 di2/dt V2 =...
  4. Learner

    2 Quadrant and 4 Quadrant Multiplier

    2 quadrant multiplier Hi, Can anyone help me understand what is the main difference between a 2 Quadrant and a 4 Quadrant Multiplier? Thanks!
  5. Learner

    MPLB and ICD2 for testing circuit

    mplb icd2 Hi guys, I am looking to get an ICD2 and was wondering if anyone could help me with these questions. Coming from a motorola hc11 background, I use Jbug11 talker to test my ciurcuit connected to the hc11 eg. by placing values to port A and B etc... then examine if the circuit is...
  6. Learner

    Electric force Coulombs Law

    Quote~"If two one-second collections of 1 Coulomb each were concentrated at points one meter apart, the force between them could be calculated from Coulomb's Law. For this particular case, that calculation becomes The density of metallic copper is about 9 grams/cm3 and one mole of copper is...
  7. Learner

    Help needed to use Maple!!

    Hi, Does anyone knows how to use the math software Maple? I am having problems finding the right commands to do what I need to do..... Help would be very much appreciated!!
  8. Learner

    Looking for an equivalent of PIC16C73A which is a flash chip

    Hi guys, I was wondering if anyone could give me any suggestions on what I should do, at the moment I have a batch of PIC16C73A and these are one time programmable(OTP) micros and because they are OTP micros, I would not be able to develop programs using this chip without wasting them and I...
  9. Learner

    What is a multiplying DAC and what is it used for?

    Hello friends, I was wondering if anyone can explain what is a multiplying DAC and what is it used for? Can a normal DAC be used as a multiplying DAC by simply adding a Rf to Iout ? Thanks in advance! :D
  10. Learner

    Where can I buy CRT sockets?

    Hi guys, I was wondering if any knew where I can buy CRT sockets?? I am looking for the CRT socket for Wells Garder K6100 monitor, CRT model 19VLUP22. Would be greatly appreciated if anyone can give me a lead, thanks in advance!
  11. Learner

    Euler's rule e^iQ = cosQ+ isinQ

    Hi guys, Current doing math and having problem understand the relationship between trig and euler's rule, how does one represent/convert to the other term? **broken link removed** **broken link removed** Any good ebooks here at eda download you would recommand?? I have tried the university...
  12. Learner

    Constructing a super heterodyne??

    74hc4066 mixer Hello friends, I am looking to construct an audio spectrum analyzer (bandwidth ≤ 20khz) using super heterodyne but I am not quite sure what part I should use, I am aware of mixer ICs on the market but their purpose are mainly focused for communication use. After reading the book...
  13. Learner

    using reactive components to build a battery??

    Dear friends, I am poundering on the idea to use reactive components such as inductors and capacitors to build a temporary power storage medium such as a battery but I an not quite sure if this is possible, can anyone give me any advise and guidance to see if this is possible?? My aim is to...
  14. Learner

    Definition of transient??

    Hi guys, I was wondering if anyone can explain what transient is or what exactly is the definition of transient in electrical engineering?
  15. Learner

    PCB prototype links......

    Hi guys, A while back I saw banner on the forum for PCB prototyping in china but I can no longer find the link, can anyone direct me to the link for this? or Are there any other cheap fast turn around PCB prototype service available that you would recommand?? Thank in advance!
  16. Learner

    Using CRT monitor as x-y monitor for HP 3581 wave analyzer

    monitor x y Hi guys, I have a HP 3581 wave analyzer and I am looking for BIG x-y monitor for it, I was wondering if it is possible to use computer CRT monitor for this purpose? eg. connect x-y to certain pin of the CRT connector? Does any one know if waveform monitor can be used for this as...
  17. Learner

    Why I can see supply voltage pins of the chip in Protel ?

    Prot*l 99SE question Does anyone know why when place an op amp eg. TL074 chip in the schematic it does not show supply voltage pins of the chip? I am trying to make a PCB layout but just wondering why the chip does not have Vcc pin so I can place power ports to the pin.
  18. Learner

    PCB freeware that allows to design schematic and import the netlist for track routing

    Hi, I am looking for a free ware that allows me to construct the schematic and import the netlist to PCB layout for track routing, I don't need more than 2 layers. However, I would like to be able to assign/change the pin number to customise an opamp in case they do not have the particular op...
  19. Learner

    "Best" DSP EVM for FFT

    Hi guys, I was wondering if anyone can recommand a EVM for performing DFT? So far I have looked at the TI and AD's EVM packages and am trying to decide between the AD BF533 EZ-KIT Lite and the BF561 EZ-KIT Lite, since they both have audio/video input and output which makes them very handy...
  20. Learner

    Need advice on DSP EVM kits!

    dsp evm Hi guys, I am looking to decide to get a DSP EVM kit and am looking for some advise on which one to dive in, my main application will be audio and LCD/video eg. sample audio and apply FFT to display on LCD much like a spectrum analyzer. Currently I am looking at TI's TMS320C6713 DSP...

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