Recent content by Externet1

  1. Externet1

    Amplify the smartphone headphone port voltage

    Plug to cell phone earphone jack and to your home stereo auxiliar input...
  2. Externet1

    how to make a mailbox light? guys

    Drill a hole on top of the mailbox and insert a ----> Without its pole.  Optional, add a door switch for the LED.  Done fast for $1.  Some silicone sealant may help.
  3. Externet1

    Hot Wire Anemometer

    If you end giving up on the design and construction,  hot wire air flow meters are dumped daily by the many hundreds. You can obtain them for few $ at a car boneyard.  They are called MAF sensors and in many flavors and sizes.  There is at least two types; one outputs a frequency and another...
  4. Externet1

    OK.. So i have a difficult project...

    This kind of sturdy photocell switch seems a good choice, I have used it with no problems. Available at electrical suppliers.  Sensitivity can be varied by sliding its cover partially. ----> http://pmcontrols.com/shop/photo-controls/lumatrol-t-30-wire-in-photo-control-3000-watts/ Override...
  5. Externet1

    Sliding Socket Outlets

    Remember having many years ago, a solid rubber power strip, about 2 feet long, two inches wide, 3/4 inches thick. Had two slits with the same separation of a power plug terminals (no ground) its full length.  Deeper in the slits, there were flat metal strips providing power at ANY place along...
  6. Externet1

    Motorola R2600...

    Am unable to download such Motorola R2600 service manual (Or General Dynamics R2600) supposedly available as .rar at a few places on the web, tried with different compfusers and all choke at every try.  :(    -I do have the operator's manual- Please, does anyone have it or has the skills to...
  7. Externet1

    fuse checker problem

    There is no green LED circuitry on the schematic.
  8. Externet1

    li-ion charger circuit

    That is NOT the way to recharge Li-Ion cells.  >:( Each cell must be taken out of circuit and placed on a dedicated charger and recharged individually with a 4.100V fixed voltage regulator.  No 7812 regulators to be used there.
  9. Externet1

    Communications spectrum analyzer with all bells and wistles for sale...

    Hi all. My Motorola R-2600 communications system analyzer; does a buunch of things: Spectrum, modulation scope, signal generator, duplex, modulation display, sweep, bar graphs, oscilloscope, tracking, AM-FM, speaker, 0.4MHz to 1000MHz, and more... Picture taken today, showing spectrum mode...
  10. Externet1

    RF linear amplifier for sale...

    HF 2 to 30 MHz;  12-14 VDC, with additional reception preamplifier built in. -In perfect working condition- With schematics and data sheet from Motorola RF finals. AM, SSB, 100-140Watts, aluminium heat sink. Believe this are just the output transistors...
  11. Externet1

    Spectrum analyzer for sale...

    Perhaps someone is after one of these instruments. Am not actively using it any more. Need $135 cheap for it. It is an oldie ISA ECR-1 in good working order, 1000 MHz; powers on 120VAC or 12VDC or with a couple of 6V sealed lead batteries inside, which are removed now. All dings , scratches...
  12. Externet1

    Wanted: CD22204 or MC145436 ICs

    Anyone having a couple of these, new or used please ?  It is a 14 pin DTMF decoder; usually canibalizable from older answering machines. Let me know what you need, I may have it.  Am in USA Other numbers may be SSI204;  UM9204
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