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  1. jknightandkarr

    Need Heaphone/Mic Amp Circuitry

    Ok will have to see if i can find anything on the mic for a part number. That should give a place to start. Joe Edit. Checked mic element, and not one single marking of anykind... don't even know who made the kareokie machine the mic came from. Looks cheap though. I doubt that my freq...
  2. jknightandkarr

    Need Heaphone/Mic Amp Circuitry

    I will have to see if i can find some software to test the mics db freq responce. First then. Thanks for this info. While i know some electronics, audio for me is uncharted territory... I have an analog oscilliscope, freq counter and cheap saleae knock off, wonder if any of those will help.. Joe
  3. jknightandkarr

    Need Heaphone/Mic Amp Circuitry

    I have a cheap mic, can't afford much right now. Was looking up mic specs for stuff in like the $100 range and saw that they have 20hz to 20khz. I am in the process of rebuilding the mic as i had to tear it appart to fix a broken switch issue. Also hoping the filter(s) get out alittle back...
  4. jknightandkarr

    Need Heaphone/Mic Amp Circuitry

    Well, not worried about this anymore. Friend gave me a set of TurtleBeach Earforce X12 headset. However I do need help with a microphone. I want to make a filter for a 20 Hz and 20 kHz filter. I got the values for a low pass filter and a high pass filter, but more checking out told me that just...
  5. jknightandkarr

    Need Heaphone/Mic Amp Circuitry

    I just copied the whole section, didn't feel like editing. Speakers are those really small cheap over ear headphone/small toy looking speakers, I think they might be bad...they measure 30 ohms. I didn't think they had that much resistance on them. Probly simpler to just buy a new headset n say...
  6. jknightandkarr

    3D printer's heat bed fabrication (Gerber files)

    I can answer the 2nd question for you, as I have 2 3d printers, both having heated beds. The heated beds are required when printing with some kinds of filament, such as ABS plastics. If the bed is not heated to a certain temp n kept at that temp the print adhision may fail totally or even warp...
  7. jknightandkarr

    Need Heaphone/Mic Amp Circuitry

    Ok, first I have a set of turtle beach ear force x11 gaming headset with the following specs: Headphones: - 40mm diameter speakers with neodymium magnet - Speaker Frequency Response: 30Hz - 20kHz, >120dB SPL @ 1kHz - Condenser Microphone Frequency Response: 50Hz - 15kHz - Cable length...
  8. jknightandkarr

    Sanyo VWM-710

    I am in need of schematics / service manual for a Sanyo VWM-710 vcr. I got hit by a power surge and now its non-functional. Already checked fuse, its fine, so I need something to help me locate the issue, I am not seeing any obvious issues. I know I can fix it, just need some help. Thanks. Joe
  9. jknightandkarr

    Parts suppliers

    I hope this is the correct area, but I am looking for sources of bulk component supplies. The only one's that I know of are Digikey, Mouser and Jameco, 2 of the 3 of them have what I need but WAAAAAY too much, plus I don't need 250 or 400 or esp 800 count orders...... I need Blue 0.4"...
  10. jknightandkarr

    Electronic Component Organizer App

    Ok, Thanks. Joe
  11. jknightandkarr

    Electronic Component Organizer App

    Is this app still available? I can't goto the site at all. Joe
  12. jknightandkarr

    Need help with a project

    Sorry for the delay in the reply, haven't been on in quite a while. To answer your question, I have 3 different microcontrollers, The Basic Stamp 2, Arduino Uno, and the Propeller Microcontrollers. So far planning on using the Propeller, so there's 32 I/O pins, but I am concidering using shift...
  13. jknightandkarr

    Need help with a project

    I am trying to make this KITT's dash compass andi have the leds and using a microcontroller to power them but need help on how to wire them so i use the least amount of conponents possable. I thought of darlington transistor ic's but on the 4 10 led bargraph onesi think both anode n cathode will...
  14. jknightandkarr

    Oscilloscope calculations

    Anyone? Joe According to estimates I need t to equal like 19.3 not 6.6
  15. jknightandkarr

    Oscilloscope calculations

    Ok just to make sure i am doing this right on my Instek GOS-620 scope. Volts= No divisions × volts/div x probe setting My case v= 2.0 x 0.1 x 10 so v=2. Now freq is #of div/cycle × time/div i have t=6.6 x 50us=330us n freq=1/t or 1/330= 3.03 kHz buuuut the signal is the scopes 1kHz, 2Vp-p...
  16. jknightandkarr

    PCB manufactureres

    Joe
  17. jknightandkarr

    PCB factory

    I take it this is a service you have? What are your costs? Joe
  18. jknightandkarr

    PCB manufactureres

    I am looking for the cheapest pcb manufacturer that i can. I have a project for a friend and OSH Park going to charge almost $900 for all the pcb's i need. Granted theres 3 copies of each board, but i cant do any thing with the other sets. Any help isappreciated. Thanks Joe
  19. jknightandkarr

    I don't know what I"m doing wrong.......about to give up....

    Yeah I hear it click off. I get very rair spikes going justr above 170, but only lasts part of a second. Joe
  20. jknightandkarr

    I don't know what I"m doing wrong.......about to give up....

    It clicks, no neon light, only a power indicator. Joe
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