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  1. Delta Prime

    Comedy Thread

  2. Delta Prime

    Cellular Playground

    I have heard of open BTS by MIT. I'm rather biased, I prefer ⁸"Cal-Tech." GSM frequencies are from 890MHz to 915MHz for downlink. and, from 935MHz to 960MHz for the uplink,with a channel dimension (or channel separation) of 200KHz. GSM transmission is performed on a "For profit" licensed...
  3. Delta Prime

    DAB Radio no longer producing sound

    Sounds like a case for the old headphone jack trick. Does it have an headphone Jack input? When you keep the radio in the Garden shed, mother nature will slowly corrode, oxidize, rust the unused input jack for the headphones. The symptom would be as you described muting the audio amplifier...
  4. Delta Prime

    Need to find where i can get a ceramic cement resistor or equivalent please. The white 2W 3ohm 3K in photo

    Madisound 3.0 Ohm, 5 Watt Wirewound Resistor 5 watt cement resistor Tolerance: 5% Tinned copper leads: 29mm + 3mm long Dimensions: 10mm H x 10mm W x 22mm L Flame proof ceramic case with flame proof cement Ceramic core Press fitted end cap The alphabetic code F,G,J,K,M Is the resistance...
  5. Delta Prime

    Joe From Derby

    Welcome to Maker Pro! :) “We do not chat here; we give answers”. If you wish to chat, please soldier your thoughts in a frame of a question so we may respond in a form of an answer. Loopholes! Got to love them...:cool:
  6. Delta Prime

    Loudspeaker as an indoor FM aerial

    It was only that you had it hooked up to a piece of metal...your speaker. I have made VHF FM dipole antennas out of mechanical spring toys...called slinkies. even boat anchors . Never tried a speak her before. It would be an unbalanced Ariel antenna or a mismatched 300 Ohm's Impedance...
  7. Delta Prime

    Cable voltage drop - capacitor reservoir

    Capacitors store electrostatic energy...E=CV squared÷2. current-voltage relationship is given by i(t) C×dv÷dt. For a capacitor a instantaneous changing voltage dt=0 requires an infinite current; "Good Practice" in electrical engineering states, this cannot be achieved. The change in voltage in a...
  8. Delta Prime

    MIDI Sound module no output.

    I'm on a stupid phone can't read the numbers they're upside down can you just write them thank you
  9. Delta Prime

    Cable voltage drop - capacitor reservoir

    Neither. Your scenario sucks. instantaneous current through a capacitor is ( I=C*du/dt). (Strike one).The capacitor acts as a short circuit when it is discharged . You say" transient" that implies time. How long is this transient (du/dt)? Your capacitor needed is based on energy. It has to...
  10. Delta Prime

    Cases chasms and crooks.

    6 You have answered your own question. Anatomically speaking... one is an output. Use your imagination for the input.
  11. Delta Prime

    Sallen Key Low Pass Filter, bandpass filter

    Another 412 threads! A bit of a day off is a nibble... I can only hope once you have achieved your goals and mass produce these things. You give a significant portion to charity.
  12. Delta Prime

    Comedy Thread

    I can read between the lines! Your subtle innuendos posted in other unrelated threads. You attack me... I have stated I am here on this particular site to work on my humility. Not to be humiliated. Which in itself is a lesson and I recognize that! But with that said. One thing I do not...
  13. Delta Prime

    Comedy Thread

    It's on now! I got your winky right here! I want to make this absolutely clear. You are my intellectual Superior! That's the only reason why I don't like you! The information you provide is indispensable and I am at your disposal. But you are the same herald that is on physicsforms.com And I...
  14. Delta Prime

    Sharing hardware projects like code on GitHub

    I envy everyone who provides information to the best of their abilities, ideally a repository of knowledge: Is there for the taking. It's called the internet. Have you ever walked into a library? (Rhetorical Question) All the answers to your questions are there... but you don't know how to look...
  15. Delta Prime

    Excellent video on how electricity branches

    I'm only saying this cuz I'm jealous of this guy! He explains his analogies in such a convincing way. I thought for a femtosecond. "This man has chosen an O'scope, that was his first mistake." To each his own. For electronic circuit theory, that's good enough; It paints a picture using...
  16. Delta Prime

    Comedy Thread

    I would like to know... Which moderator took out my post? My fence fell over.
  17. Delta Prime

    Maximum circuit size posting

    I hope this helps. https://maker.pro/forums/threads/uploading-pictures-to-the-forum.294979/
  18. Delta Prime

    AC generation

    This is the part where I don't completely understand the question. So for DC I would use a optoisolator and a power mosfet for 120 volts DC. For AC I would use a optoisolator Driving a triac for 120 volts AC And for both I would use a SSR or solid state relay. Does that ring any bells? This...
  19. Delta Prime

    Custom LED Lightbulb circuit

    Welcome to Maker Pro! :) Just be safe amigo! I wish you well...
  20. Delta Prime

    Help 1 mars 48v 500w 12.5ah ebike bat 1 36v hoverboard motor with 3 10g green blue green , 5 16g, black blue yellow green red and 1 16g white wire

    This motor controller is engineered for a 36 volt battery pack. There is a minimum voltage to which the controller will cut power from the battery to the motor when the battery is low so it does not cause a fire! If You put a 48 volt battery pack connected to a 36 volt motor controller the low...
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