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  1. roughshawd

    3 jumper pinouts on R3 Arduino Uno

    There are 3 pinouts that look like bridge connectors. There are 3 of them next to the SDA-SCL pinouts on the edge of the board. Do I need to jump these for the SDA-SCL to operate, or what are they used for?
  2. roughshawd

    Ancient Adeptness of Hidden Powerworks

    Boy am I confused now !!! My furnace broke down, actually the blower motor gave up, the shaft is about 10k ground out on the fan end but what the heck, it's a real old 220v coleman, what do you expect right? So I go online and feel real lucky finding a direct replacement for it at this real...
  3. roughshawd

    Transformer wrapping

    I have read alot of articles on transformer wrapping, and I am really worried about attempting to make one for a specific purpose. That is to say that most of them talk about the linear value of the wire and that if you need more signal use more wraps, if you want more power use bigger wire(or...
  4. roughshawd

    Large chip with no markings

    This was in a pm144mt II practical periferals old phone modem.. It sits over where chip 99 is supposed to go.. What is it? A multi M resistor? A chunk of magnetite to induce current? Should I put it back on the board? [Mod edited - resize huge image]
  5. roughshawd

    Laser fence notes....

    Does anyone in know the distance that a small modular laser can be separated from a modular eye before it fails?
  6. roughshawd

    Small motor with 104 cap bridge between terminals.

    I have wanted to ask this question for years!!! I have encountered this quite a few times in my tinkering. What is the capacitor between the terminals on little motors for? I am thinking like...to slow the RPMs down... or make sure the motor is getting a constant flow of current?
  7. roughshawd

    Power supplies and exchanging boards

    Will a complicated electronics device such as a musical organ, work if the power supply is changed out for a PS with the same voltages outputs ?
  8. roughshawd

    SD-1 Ensoniq Battery low message test

    In my synth theres a program that reads the voltage in the battery and posts a value. I read about this type of circuit in high school, it just identifys a condition and then translates it into a value that that is posted by LED display or guage. This allows the equipment to warn the user that...
  9. roughshawd

    2k long shank pot

    I have a die harder diing but not yet a star treasure hunter All Vision Pro metal detector, that has taken a hard knock and needs a new pot, but I cant find one. It still beeps and the detection depth function still seems to work, but the discriminator circuit that tells the difference between...
  10. roughshawd

    Mainboard with reworks need comparison to same type

    I have an SD-1 electronic synth production system that has a failed battery problem. After reading through the repair book, it gave me a key in code that gave me a final numerical answer... that I need a new main board for it. Problem is that the main board has rework on it, there is a yellow...
  11. roughshawd

    Gulbransen Power Supply Redux

    I have a burned up transformer from a Gulbransen organ. The power supply delivers multiple voltages to the system, but is going to be costy to repair to original. Can I replace the PS with multiple power supplys, one for each of the voltages and bridge them or something?
  12. roughshawd

    Fixing old 50ohm antenna

    I asm fixing the old radio antenna off a boat. The old antenna cable broke off at the mount, its a screw in antenna,fiberglass. But it is so decomposing, I think I will put a new coat of fiberglass resin over it to rebuild the covering on it. I took the antennas whip base, which is a male...
  13. roughshawd

    combo jack GPS, extrernal speaker

    The Standard horizon Intrepid VHF marine radio has a multi-plug system in it that allows a microphone with controls on it to control the radio from a remote location like a fly bridge, while keeping the radio safe and warm in the cabin. It also has a 7 pin accessory jack that is used to input...
  14. roughshawd

    ancient boat toys

    I have in my lap and dirty hands, a Coastal Navigator C/Nav 9300. It was made in the USA, and has no other markings on it. It has an 8 pin TRIDUCER plug in and a 2 pin POWER plug. I have the original installation but havent found the TRIDUCER yet. What I need is a manual as to what this...
  15. roughshawd

    The legality of cloning, simulating and decompiling

    I went to a garage sale. I found a really great paintball gun there for only a few dollars. I couldn't pass it up. I went home and found that these new paintball guns have small circuit boards that are powered by a 9v battery that allows them to fire in rapid succession or like an automatic...
  16. roughshawd

    Marine Beacon schematics for project

    I need to build an emergency beacon so If I sink, someone will come and get me, and frankly I can't afford to sink! So maybe I should build one? I have to agree that this is a professional project that should probably be left to engineers and tech savy hackers, but I can't resist my little...
  17. roughshawd

    Detecting IR beam

    Tell me please... Why can't an IR beam be detected sideways?
  18. roughshawd

    IR and seeing it...

    If I shine an IR projection light straight up, can I see it with an IR sensor a long distance away? I want to build a marine emergency beacon based on this idea.
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