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  1. S

    how to read relays?

    hey guys, so for my amp project, i need a relay. Problem is, i don't know the pinout, but problem is, parts express didn't put the pinout on their website, and the datasheet wasn't helpful at all. heres the relay...
  2. S

    Need opinions on regulation.

    Don't use a LM7805, those aren't really good, instead use the Reference voltage version of the LM317( it think its tl317) that produces around 50ma i think.
  3. S

    Drilling pcbs

    sweet man thanks, just to be sure, you used a hand drill right
  4. S

    Video surveillance

    There are lots of mini action cams that you can connect a component video cable to, some of those are in 1080p hd, wide angle, and all that good stuff.
  5. S

    Drilling pcbs

    Bru, thats so siiiick. how did you connect the motor to the drill bit?
  6. S

    Some LEDs Not Lighting

    he is right, @Sloan5556
  7. S

    Drilling pcbs

    Thanks guys for the replies, but i really want to avoid buying a drill press, especially since i have limited space in my garage. whats the price range for the carbide drill bits, and how often do they break?
  8. S

    Drilling pcbs

    hey guys, what drill bit type and size do you guys use to drill your pcbs? The small ones always break, and the big ones are too big, and i can't find any suitable ones. thanks
  9. S

    HDMI switch

    yeah i do need audio and video switch thanks for input
  10. S

    HDMI switch

    hey guys, for one of my projects, i need a hdmi selector switch, but it is very impractical to put like a 20P10T switch. I need help with selecting a readily available for sale chip that will do the job for me. some specs: 19 pins (hdmi) about 10 channels thanks
  11. S

    high current solder

    thanks for the reply.
  12. S

    high current solder

    as said in this thread here: https://www.electronicspoint.com/threads/pre-amplifier-line-in-mixer-chip.272880/ i am building a HIFI amplfier. the current is gonna be big so I need some solder that will carry at least 4 amp of 100v current efficiently. WIll regular solder work? or is there some...
  13. S

    Smoothing the waveform

    IDK, i think hes talking about high frequency waves that leaked into the output of whatever his device does, and hes trying to filter it out. agreed with your last sentence
  14. S

    Smoothing the waveform

    LR circuit or RC circuit would do. LR is low pass and RC is high pass (most efficient way) http://www.learningaboutelectronics.com/Articles/High-pass-filter-calculator.php http://www.learningaboutelectronics.com/Articles/Low-pass-filter-calculator.php
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    pre amplifier/ line in mixer chip

    well, i guess everyon has their own opinions. My dad knows how to buy genuine parts from china because he used to live there... so yeah
  16. S

    pre amplifier/ line in mixer chip

    wait, hearing aids? whats the bluetooth for? listening to music? i wouldn't use bluetooth, as its sound quality is limited to like 48k hz bitrate i think. using another type of transmission would be better, but the problem is that stuff thats on the market isn't high quality enough, so you...
  17. S

    pre amplifier/ line in mixer chip

    heres what im doing: LME49811 for subwoofer amp, highs arent really good, but lows are siiiick, its basically a flat line thd across most frequencies lower than 10k. circuit: http://www.elisanet.fi/ch/gainx2.html (courtesy of chris) LM4702B (4702A if possible) for main amp, designing something...
  18. S

    pre amplifier/ line in mixer chip

    never mind, i found one here: http://pdf.datasheetcatalog.com/datasheet/texasinstruments/opa2134.pdf OPA2134 0.00008% thd (yes! its 4 zeroes!)
  19. S

    pre amplifier/ line in mixer chip

    its not like i can hear a difference, and i know that, i am an audiophile. But my power amp is .0003 % thd, and putting a inline mixer thats 0.01% will kill the purpose of the power amp being an overachiever in THD. but, once you crank up the power amplifier or the inline mixer, the distortion...
  20. S

    pre amplifier/ line in mixer chip

    hey guys, so i'm building a super hifi power amplifier from a chip amp, the harmonic distortion is 0.0003%, and i need a line in mixer. but all the line in mixers they sell in stores are => .01 harmonic distortion. i'm curious if anyone knows a weak hifi chip amp that'll do the job. thanks!
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