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  • 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 ci139

  1. ci139

    DC-DC Buck Converter

    somewhat related https://www.anandtech.com/show/6330/the-iphone-5-review/14 https://electronics.stackexchange.com/questions/177788/how-do-i-design-a-2a-or-more-power-supply-for-my-consumer-usb-devices
  2. ci139

    DC-DC Buck Converter

    (though it seems faster is to find a random 12V AC~ output TF + rectifier + suitable light bulb) i just ran through options to convert an old X-mas lights' transformer to sub-Ampere 7A·h Lead-Acid Charger uploaded just incase you can read/find out anything useful from this experiment -- it...
  3. ci139

    DC-DC Buck Converter

    there is not much to do to get the required package of relevant data together - but as i in near future likely will not use that particular product - you can complete it and on your own ((moreover when the the share of my own free time input here is complicated by a nation based discrimination...
  4. ci139

    Identical opamp circuits..but one with split supply, and other with single supply

    as you don't in particular bias your non-inverting inputs the both variants act as comparators - with yet "undefined" hysteresis - . . . but due to a speculative assumption the "op amp" being more sensitive to inputs at near the supply median , then it is likely that the "+/-5V supply" variant...
  5. ci139

    embarassingly simple dimmer question

    if you have made one of these you must know that the regulator is (depending on design) in more critical operating range at the dimmest settings as said (depending on design) while filament is dim the voltage drop at regulator/dimmer is high ??? the flicker might be some sort of automatic...
  6. ci139

    What are theese components used for? And what components are the basic once you gonna need?

    MOD edit!!! Take this as a warning pussycat!! We do not tolerate bad language here on ETO Child friendly site... This thread is totally useless... I'm closing it!!
  7. ci139

    What is this diode-resistor pair on a N-ch mosfet gate doing?

    there another use of such https://www.infineon.com/dgdl/an-1077.pdf?fileId=5546d462533600a40153559563801007 though not much coverage in text ... if i consider where i have used bi-di difference is at emitter collector or even base circuit of the bjt where the diode has following effects @...
  8. ci139

    What are theese components used for? And what components are the basic once you gonna need?

    what is "What" ? (()) https://www.compoundchem.com/2014/02/19/the-chemical-elements-of-a-smartphone/ e.c. e.c (and so forth) https://en.wikipedia.org/wiki/Et_cetera
  9. ci139

    embarassingly simple dimmer question

    just a thought - years ago there was some promotion price portable multi tool - it took ages to charge and you could then work about 10min or even less - when i opened it up it had a powerful 9 or 12 V dc motor installed but the battery pack was 6 or 7.2 V one . . . another one was the...
  10. ci139

    What are theese components used for? And what components are the basic once you gonna need?

    it is also possible to drill or etch out the metal parts and use the glass and ceramics as beads for modern jewellery e.c. e.c
  11. ci139

    Size matters

    we can suppose there are two factors behind it (•) the melted first direction having least resistance/drag (••) the net surface tension combined with the weight of the chip with the number of pins and the symmetry of the chip ?? also the intensity of the air flow - - - just a best guess
  12. ci139

    A Wearable Sound-to-light Display

    Ti's electret reference design https://www.ti.com/lit/ug/tidu765/tidu765.pdf
  13. ci139

    A Wearable Sound-to-light Display

    is actually covered through and more concentrated at the end of the linked document for Grounded Source mode // Source-Follower mode // With separate connections to the S/D of the internal FET obviously and from this article comes out another potential improvement to the circuit - that is - an...
  14. ci139

    DC-DC Buck Converter

    status :: // it seems that the PWM setup is highly ??? flexible (Tbl-12-03) but there is only one poor app example(was not searched ↓1-st **↓)/spec(was not found) ??? they must had a target design or a set of when developing the '13'25'45'85 chips - can't find any ...
  15. ci139

    DC-DC Buck Converter

    there's an article explaining the I/O speeds on a different mcu basis -- but we can predict the input rate being apx 1 x sys clk from Figues 10-3 & 10-4 -- that incase there is some ideal sync. between sys-clk and incoming digital signal otherwise it's variable 1 to 2 sys-clk.-s e.g. at 20MHz...

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