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  1. OLIVE2222

    Linear RF power amplifier

    80° seems acceptable, but it' s not optimum for the amplifier life. In the document here under they claim that package with a 25% improvement in thermal resistance which corresponds to a operating life improvement of approximately 400%...
  2. OLIVE2222

    Creating an ASIC chip in a lab

    For Actel even analog blocks are available: http://www.actel.com/products/fusion/default.aspx Olivier
  3. OLIVE2222

    PCB manufacture

    Hi Alex, I have a quick look on your files. Unfortunately you put the tracks on the top layer. This will be OK electrically put a pain to solder. better to select all the tracks and to set them to bottom copper layer. Olivier
  4. OLIVE2222

    PCB manufacture

    Hi, looks more to be a warning. Just double check with a gerber viewer. Olivier
  5. OLIVE2222

    Old VCR's

    Hi Sudden, If the tuner as a test swith, you can build a poor man TV signal generator with. Olivier
  6. OLIVE2222

    Creating an ASIC chip in a lab

    Hi dcharters, welcome to this forum. ASIC are almost only intended for big companies having needs for large IC amounts and ready to pay high setup costs. Universities can however have sometimes access to semiconductors foundry facilities via research agreements. I guess you maybe just want to...
  7. OLIVE2222

    PCB manufacture

    Hi, No i am not with designspark. Just having a PCB file should be OK The NC drill file is "self contained" no need to tell anything, see here under: http://www.apcircuits.com/resources/information/nc_sample.html. If you want the large pads to be drilled you must place pads with holes...
  8. OLIVE2222

    Digital Thermostat Circuit Help Please

    Hi robbstech, welcome to this forum. Well if you ask for a schematic and the code (firmware) you will be close from a kit and you will not learn that much. Maybe better to go for a kit or even a ready build product. if you want guidance and advices to enjoy building you own stuff, you probably...
  9. OLIVE2222

    power button dont need

    Ok Lovehack no idea about the Cerf board 250 if it's push button powered give a try to the short solution anyway, will not hurt. Hopping that the board will not power-up then power down because the button stay in "pushed" position. Olivier
  10. OLIVE2222

    Light bulb vertical scale circuit

    Hi dr.redgog, welocme to this forum, The easier is to use a solid state relay as this one: http://www.futurlec.com/Relays/SSR5A.shtml the led output of your LM3914 (or any other led output) is directly compatible with this kind of component. Olivier
  11. OLIVE2222

    power button dont need

    Hi lovehack, welcom to this forum. Normally you just need to short the power button (I guess a momentary contact one). This should correspond to the green wire (power on) of the ATX power supply . Olivier
  12. OLIVE2222

    PCB manufacture

    Hi, and welcome to this forum. The standard file format file to be used for export is Gerber. You need to generate a gerber file for each layer used. Indeed you need a NC drill file, with all holes positions and diameters. Your undrilled pads just need to have 0 as hole diameter. Olivier
  13. OLIVE2222

    Pls help decode

    good damned I am still to slow to wrote my posts ! Yep and m stand for milli not micro
  14. OLIVE2222

    Pls help decode

    Hi bazzel, mcd stand for micro candela, see http://en.wikipedia.org/wiki/Candela 2.1Vf The V stand for Volts and the f for forward. ist's the used voltage Ifmax I is the electric current used, here 15mA = 15 milli amperes So it's give the light brightness under defined conditions.
  15. OLIVE2222

    high amp 12v Power Supply

    Hi Dr Pinky, I guess that a welder supply have maybe a less "clean" output then a lab power supply, should be OK however for rotating lights when passed through the 24/12v converter, to be checked for the alarm system. Other unknown thinks (to me) is how the regulation will behave with such...
  16. OLIVE2222

    modify flashing dog collar to solid on

    Hi Burty, Is there is only one operation mode there are not many thinks to do. The circuit is based on a small chip located under the small epoxy drop, no access so. Many visible components are 0 ohms resistor, mean just act as plain wire. The timing can maybe be changed if we alter the value...
  17. OLIVE2222

    programmable version of a 555 timer?

    Hi Dave, They are indeed many product on the market ! Atmel and Microchip made the most popular 8-bit products on amateur level.Both have almost the same possibilities for comparable devices to make it simple. Which one is the best is almost a religious affair, so here under some...
  18. OLIVE2222

    One switch two light bulbs.

    sheldonstv, A satisfying answer was already provided to the OP. The only thinks it can probably be done is to provide any other working solution just for the technical beauty, or something cheaper or smaller. Olivier
  19. OLIVE2222

    how to make buzzer only beep once.

    Dear sheldonstv, The first schematic is useless as the OP as drawed a reed switch as trigering element, no inverting function for the set/reset available so, moreover it's just a flip-flop, no temporisation available. The second schematic is also useless as he is 12 volts powerd where only 4.5...
  20. OLIVE2222

    programmable version of a 555 timer?

    Hi Dave, Welcome to this forum! I find this one: http://www.hightechips.com/Download/htc555.pdf It's more a programmable clock with some 555 pinout compatibility. maybe others are availables but they probably will not allow you to do thinks link 3 consecutive blinkings. To achieve...
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