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  1. Arouse1973

    New LTspice

    Just a quick one to those of you that use LTspice. If you weren't already aware, a newer version of LTspice in available. Not much of an update but the changes might be of use to some. http://www.linear.com/designtools/software/?gclid=COeHia-lxM8CFWkz0wodHdYI_A#LTspice Thanks Adam
  2. Arouse1973

    Audio Circuit Collection

    Arouse1973 submitted a new resource: Audio Circuit Collection - Predominantly circuit diagrams for music related equipment like guitars, but site has many others Read more about this resource...
  3. Arouse1973

    Component Identification

    Arouse1973 submitted a new resource: Component Identification (WIP) - Some useful component identification information Read more about this resource...
  4. Arouse1973

    DC2132A

    I saw this in the latest LT Journal and I have requested a FOC sample. I thought it might be something you guys are interested in. LT are very good for free development PCBs, if you say you are interested in having a look at their products. Some of you might know a rep who could get one for you...
  5. Arouse1973

    DipTrace PCB software

    Found a nice free PCB software easy to use and is limeted to 300 nodes for lite version. I am designing a new power supply using it. It has a very comprehensive library of parts. www.diptrace.com Adam
  6. Arouse1973

    Measuring Batteries in Series

    I was involved in a recent thread regarding measuring the individual battery voltage of series connected cells. The original OP didn't have the experience to design or construct anything too complex, so he was looking for an off the shelf solution. Nothing could be found so he opted for taking...
  7. Arouse1973

    Write Only Memory (WOM)

    Hi Guys Came across this data sheet and was wondering if you could help me with how I could have used the device? And also they don't seem to make it anymore, I wonder why? See attached data sheet. Thanks Adam
  8. Arouse1973

    Op Amp Stability

    Arouse1973 submitted a new resource: Op Amp Stability - Information and solutions to stability problems you can get with op-amps Read more about this resource...
  9. Arouse1973

    Poles and Zero's

    Hi Guys Does anyone know how to work out the position of the poles and zeros in the s plane of a simple LCR filter. I would like to see a step by step example on how they are derived. The internet does not explain the steps good enough for me. Here is what I understand so far. the transfer...
  10. Arouse1973

    Meat Balls

    Made some meat balls for tea tonight, very nice. Although the misses said my balls were quite small but nice and tender. Does anyone know a formulla for bigger balls? Am I squeezing them too much? I was thinking RMS root meat squared but not sure. Is it the squeeze ratio to meat quantity. Com on...
  11. Arouse1973

    Crystal Balls for sale

    Got an offer on Crystal Balls if your interested. Buy one get one free. Free p+p. Seem to need them to work out what some people are on about. Then they give a two page explanation of what they want after you ask for more details. Being a so called noob doesn't shouldn't stop them explaning...
  12. Arouse1973

    Over done I think?

    Do you think they over did it with the regulators?
  13. Arouse1973

    Solenoid Back EMF

    Hi Guys What is the best formula for working out the back EMF of a solenoid. Now I have the results but wanted to calculate it for fun to see how close I can get to real life. This is a sealed unit so I can't see the coil. The coil is 24.6 Ohms and has an inductance of 20.6mH. The voltage...
  14. Arouse1973

    Optics Help

    I have an interesting problem I need help with. I have an Opto Reflector that I need to detect the presence of a metal surface 50mm away. Circuit works fine, but if I put certain transparent objects in its path as a cover to protect it from dust it reflects of it. Now you might think this is...
  15. Arouse1973

    pictures

    What is the easiest way to put pictures on this forum? Thanks Adam
  16. Arouse1973

    Xmas Puzzle

    Hi Guys thought you might like to have a go at a puzzle. Take a 1V battery (Theoretical) and add two series resistor from + to - first resistor 100R and second resistor 900R. The point where they join we will call point A and where the 900R connects back to the battery - we will call point B...
  17. Arouse1973

    555's are terrible, no they're not, yes they are, no they're not

    edit: This thread extracted from here: https://www.electronicspoint.com/electronics-newbie-controlling-led-illumination-t266361.html 555 timers are rubbish and should be banned any crediable engineer would not use them. You could try a constant current charging a capacitor as part of an osc...
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