Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by GromTag

  1. GromTag

    NASA Apollo 11 space mission to the moon.

    Nah I don't hash run in packs particularly into dark tunnels even if there was mentioning of free ice cream at the other end! :sorry: all that free ice cream.... Placed something out of context unto
  2. GromTag

    NASA Apollo 11 space mission to the moon.

    Post #19.... Yup. Here I go. (Runs into the tunnel with tracks that has a strange loud rumble and an air horn? And ohh look a light way down there, wonder what that could be? ) :woot: Issues locally near me have resulted in the abbreviated terminology (Female terminal / Male Terminal) that...
  3. GromTag

    Why does my computer have high magnetic fields - only in certain houses?

    No two houses are alike, bad wiring methods are vast. And a loose .... line can cause EM leakage. No existing Earth connection can as well result in more noisy equipment. Or ground faults if the operating device requires an active Earth line. On another note, EM fields do seem to be a growing...
  4. GromTag

    120vac LED light bulb

    Irrelevant post.
  5. GromTag

    120vac LED light bulb

    BP5131D is an example LED driver that may be similar to that bulb. Or a close example. This one can handle some voltage tho. Some other types not so much.
  6. GromTag

    120vac LED light bulb

    Hmm, 16 LED at (if around 120V A/C) ... rectification can result up to 130 or so volt. LED should be around 8 or 9 V drop each. The full bridge rectifier and capacitor result a DC Voltage and the "Chip" is a current limit regulator with an external resistor or resistor divider to set the...
  7. GromTag

    Motion-detector-sensor-circuit

    (restate) PIR sensors trigger when ambient temperature is shifted enough from stationary or humidity changes in erratic behavior. Humidity can throw temperature as well. Some types of clothing are invisible to PIR, Rayon, and some Nylon blends leaving only small exposed areas to be potential...
  8. GromTag

    What is this solder blade tip for when this other one already exists?

    Yes all ready soldered parts that just need a touch up. Also a tool is often used in ways that were not intended for can apply as well. Just in case others have found ways to use reworks and similar in other ways I can't think of. If I found my self with a flat tipped wide soldering tip like...
  9. GromTag

    What is this solder blade tip for when this other one already exists?

    No I do not work for any soldering iron company. Have seen similar to those JBC tips used before.
  10. GromTag

    What is this solder blade tip for when this other one already exists?

    An attempt at adding this info in via edit resulted an error. The C245-914 can be used for both applications, tho the tapered end could cause an IC to lift if the adjacent rows if any and has not been latched down (board glued or soldered). The 730 tip can press flat with a width for more...
  11. GromTag

    What is this solder blade tip for when this other one already exists?

    C245-914 tapered - sloped - wedge Blade, general soldering, ability to control the solder and move pin rows aligning SOIC - 8 pin,14 pin, and so on with multi pin IC's. Apply to a row and apply solder pin to pin adhering to thermal limit and time for part. And can scrape / relocate solder on...
  12. GromTag

    Multi-turn Trimmer Pots - Locking the Adjustment?

    Multi turn trimmers have some issues with the design in itself. Vibrations can cause adjustments tho not unless the method is precise as in vertical frequency and circular horizontal axis. Altho the internal components would resonate, (don't know the frequencies) and bend slightly (similar to...
  13. GromTag

    Making an old tractor new (ish)

    Recall a plow tractor with those axles types, had a rubber hose with 2 large hose clamps on the outer ends of each. Wondering on how far the wheel would be permitted to travel along the axle shaft. That for a 70's model is in better shape than the ones residing locally here. These nearby are...
  14. GromTag

    Touch sensor circuit

    I see the images and documentation now, the information provided in post #2 match up.
  15. GromTag

    Touch sensor circuit

    Can not see the image for the type of board, is it the blue one or the red board? The blue one I've found has LC on the development boards sensor pad. Or The red, Touch printed on the sensor pad on the back of the board? Tho both use a TP223 chip. Note this chip directly is limited to 8mA...

Latest threads

Back
Top