Search results

  1. O

    want mobile jammer circiut

    Hello all, I didn't read the individual schematics, but the key here is "the maximum RF output power".  The FCC states that anything that transmitts RF over 500mW output power must be approved, for private or public use, regardless of frequency.  (I can find my FCC-Part 95- rules and regs...
  2. O

    EPROMs and "Don't Cares"

    Kain, In short, No. (over simplified-----) Basicly, regardless of type, ROM's are just that- Read Only Memory.  You supply an address, and the data is what you have programmed into that address.  If there is a point in the rom that you do not want to use, or "don't care" what it has, don't...
  3. O

    Drilling PCB?

    MP, I honestly don't remember my Dremmel speed rating.  I have it put away right now.  (Had back surgery last year and haven't dug alot of my stuff out yet.) As far as your statement about carbide -vs- HSS, yep!  If you are ANYTHING more than a hobbiest, carbide is the way to go.  I'll even...
  4. O

    Inverter Question

    MP, As far as "buying -vs- building"--- maybe!  I get a lot of scrap parts in my job.  except for a few parts, I may be able to build cheaper.  I don't know until I look at a schematic.  I am considering building an analog ESR meter that I know is cheaper to build than buy. Yeah, as far as...
  5. O

    Capacitor Voltage

    MP, Although I can't show this, I can guess: If there is a circuit where the ESR of the cap is critical, it would be different between the voltage ratings, even though the cap's value is the same.  Even caps with the same rating and voltage, from the same batch, can vary in ESR. How's that as...
  6. O

    VHS tape to VCD

    Do a Goggle: VHS to CD-R You will get too much info about video capture equiptment and software. oldgrandpainmi
  7. O

    Paint &electronics.

    Hey Guy's, Can I add my 2 cents? Andodizing and painting are just one aspect.  Here is a thought: If color is not a major concern, why not get some gun bluing or browning for steel parts, and/or, gun aluminum bluing for aluminum?  I had to check this out, but I threw my meter across the...
  8. O

    Inverter Question

    I have been a member just a short time at this forum.  I run across many different ideas, schematics, opinions, etc., about 12vdc/110-220vac, xxxWatt inverters.  Enough to create its own thread.  So many, I have to ask: Has anyone compiled or analyzed all of the different info on inverter...
  9. O

    Hobby lathe, metal turning.

    Sounds like another attempt at Cold Fusion.
  10. O

    Flex sensor

    I know the thread is a year old, but these sensors are also used to measure muzzle pressures in weapons.  Reloaders and manufacturers are the biggest users. oldgrandpainmi
  11. O

    Digital radar speedometer

    2 quick things- A great source of d-Flip flops-  DigiKey.  Order their free catalog on cd or paperback (almost 2"thick).  They also have most or all of your laser diode needs. Also, I use ScreenHunter to screen capture.  It is free, saves everything as a .bmp file (which you can save as...
  12. O

    12 to 220V 200Watts Power Inverter

    Boy oh boy, it been a while. Remind me, please. My father and I developed a smaller inverter years ago, based on 6 PLL's, to control motor speed in a telescope tracking system.  The voltage I believe, was 110ac, but we changed the freq to adj speed.  We had to smooth the square wave outputs...
  13. O

    Drilling PCB?

    Tech_101, Depending on the number of holes to drill, I've used High Speed Steel bits for years.  Carbide may last longer, but can cost 400-600% more than HSS.  I get my numbered bits at a local "You-Do-It" center for a buck or so each. (up to #70) Since you are drilling thru fiberglass with...
  14. O

    ABS Plastic

    Rhonn' I have a plastics supplier near me that sells PVC and ABS plate plastic.  I have never asked if they deal in mail order, but you could ask.  They will also take almost any design you have and manufacture what you want. Soltis Plastics,  White Lake, MI,  PH: 248-698-1440 I have used the...
  15. O

    Hobby lathe, metal turning.

    Dazza, Having gone thru this receiently, I want to pass this on. If you are considering constructing a part with .001" tolerances, or better, there are a couple machinist forums out there that have CRC lathe operators that will do work on the side, at reasonable prices. I was considering...
  16. O

    Shutter Mechanism

    Ante, I've only owned 1 pin and 1 video.  The pin was Playball and the Video was Gyrus.  The pin was a one player game with relay contact controls, numbered wheel scoring and chimes.  Put both on my porch and the neighborhood kids played the H*** out of them.  In one summer, I made the money I...
  17. O

    Shutter Mechanism

    Hello all, YEP, you are close when you speak of pinball machines!  I've been repairing them for 18+ years now.  The idea DOES look like a specific layout in a pinball.  This is what I thought of also when I read this artical!! Oldgrandpainmi (Pinball Doctor on eBay)
  18. O

    PCB Etching Tank - Do it yourself

    Hello All, Just wanted to put my two cents in on this subject.  I didn't read all of the replys on this tank, so I hope I don't repeat too much! I built this exact tank (12"x12"x1") 15 years ago with much success.  I used it with Photo Etching and standard copper etching with standard copper...
  19. O

    Hobby PCB Design question.

    gogo, For you, and anyone else who reads this topic, I got a reply from Radio Shack in TX, and a guy named Wade who replied back, said that the rub off transfers that Radio Shack carried are now discontinued and no longer available over the counter, nor available by special order. If you want...
  20. O

    6vac Transformer design question

    Hello all, I am looking for anyone who has information on how to build a 6vac, 250-500mA output transformer.  I am also looking for a Amidon form # to build it on.  Appreciate working designs.  Must be on form of no bigger than 1" square. Anyone have any ideas and/or web address where I can...
Top