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  1. Delta Prime

    IR transparent pigment

    Sounds like fun. To meet your specific optical density and light transmission requirements from your initial developmental stage., I would invest in an spectrophotometer. which is a device that measures light transmittance through a material and from that absorbance can be inferred & It also...
  2. Delta Prime

    USB 3.1 gen 1 port wiring for charging

    This is how it works if there's no communication between the device and your power supply through the data lines then by default your phone will think that it's hooked up to a dumb charger, which it is, & will charge at 500 milliamps or one half of an amp. Do you have the USB ports, USB cable...
  3. Delta Prime

    Noise generator

    More information is needed. Are you trying to down convert amateur television broadcasting signal into the UHF tv spectrum.If So than Only a 625 line television would work . Also,., Are you trying to make the noise generator amplifier with the bfr 91 transistor? I think that's older than 741...
  4. Delta Prime

    Cannot get this circuit to work

    Get rid of the 741 & "86" the 386. talk about dinosaurs. Make it complete and throw 555 in there. I don't know what that is but it's not a squelch circuit. A squelch circuit is to mute or silence the audio output of the receiver in the absence of the desired radio signal. A"open" receiver may...
  5. Delta Prime

    Comedy Thread

  6. Delta Prime

    CIRCUIT BOARD FOR BLUETOOTH SPEAKER THAT INCLUDES LED DISPLAY OUTPUT

    Does it look something like this? https://www.ebay.com/itm/373571561072...
  7. Delta Prime

    CD4017B has the jitters

    Know nothing? Then I know even less.. Thank you for your explanation. In return. Tell Bruce... Playing around with 120VAC will not only kill him it will hurt the whole time he is dying. I have seen it with my own eyes. If Bruce can remember that then he'll have fun the rest of his life playing...
  8. Delta Prime

    CD4017B has the jitters

    This is a trick question right? You have 120 volts RMS applied directly to the 4017b my apologies via a relay to the 4017b. "Max Smoke!" :eek:
  9. Delta Prime

    fm generator 10.7

    The circuit was originally used for testingof I F amplifiers and demodulators. It was taking from a post on this site. Good stuff. This schematic was found locally. https://maker.pro/forums/threads/10-7-mhz-oscillator-with-transistor.291486/post-1788466
  10. Delta Prime

    Measuring magnetic waves from coil

    If you want to measure the intensity and direction of the magnetic field use a magnetometer. Sorry I should just said that in the first place, By the way a magnetometer is also referred to as an EMF field strength meter, so when you get bored playing around with magnetic fields you can go catch...
  11. Delta Prime

    Measuring magnetic waves from coil

    The picture is in anticipation for your next question. o_O
  12. Delta Prime

    Measuring magnetic waves from coil

    It's not that simple. you may not know exactly what strength means in terms of magnetic properties. Units used in magnet strength measurements. Tesla : density of an magnetic field, flux density. T = kg / (A * s2) A = amperes and s = seconds. My favorite: T = V * s / m2 or T = (N * s)/(C * m) or...
  13. Delta Prime

    USB 3.1 gen 1 port wiring for charging

    Wrong. When a voltage spike appears on your power mains 127VAC. That Spike will be 127v +the amplitude of the spike itself example (lightning strikes near your home this lightning strike is 10,000 volts and catches a ride on your power mains going to your equipment that is plugged in or...
  14. Delta Prime

    help fixing audio amplifier no sound out

    I'll let that one go! Looks to me like a parts board. Reference data sheet TDA7057AQ provided below. Check supply voltage Vp, pin# 4 For the dual operational amplifier 4558 Check supply voltage VCC+, pin# 8
  15. Delta Prime

    Problem with Code Composer for TI MSP430

    Hello there! :) // delay.h - delay library providing MSP430 delay macros and functions. These // are for convenience and shouldn't be considered 100% accurate, especially if // timing is important. For the most accurate delays, make sure F_CPU matches // the operating frequency of your MSP430...
  16. Delta Prime

    Comedy Thread

  17. Delta Prime

    Comedy Thread

  18. Delta Prime

    TFT touchscreen lcd display replacement info

    Make & model the device , the TFT display came out of. Please. This is the best I can do using my crystal ball..
  19. Delta Prime

    Hello, Welcome! (Introduce yourself)

    In the middle of difficulty lies opportunity -Albert Einstein Your business partner, your friend, the technologist. I bet he had a fundamental understanding of electrical theory. But at the time you were probably in the middle of something difficult. You will fit in nicely... Welcome to...
  20. Delta Prime

    Rumble 150 power problems

    Okay... but it will cost you a nickel every time you use it. I'll even throw in a vacuum cleaner. .
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