Recent content by Silicon

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    audioguru fm transmitter

    in recent post U had said that  capacitances,i dont remember exactly but it was calculated as i said not counting other values ;) i said that for others to know,at lowest frequiency windings were tight,anyway o dont care about that transmiiter anymore becoz i sold it :) and buy ..em... U know...
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    audioguru fm transmitter

    yeap that wasp circuit gived about 20m range for me too,and it consumed wery little.. in fact the only thing i was happy about that circuit is frequiency stability,the voice sensitive was wery bad,it really would be suitable only for hand-held microphone... 20m in the same room(not tru...
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    audioguru fm transmitter

    ar Usure it's output power is only about 200mW,bcoz if Q3 capacitor tuned well with  coil,when load resistance in Rf for Q3 should be only about 60Oms,and if suplly is really 9V when it should be even about 1W, oh.. but i just thinked that collector resistor doe's not let to saturete for Q3...
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    audioguru fm transmitter

    so Y'ur transmitter voice gain is about 16times,am i right,and i would like to increase it to about ~100times, so i'll need to use base resistor(between base and collector) about 1M,yes?
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    audioguru fm transmitter

    hi again.. so i'm in need to make such transmitter(and i will design it on smd ;) ) but i want to ask how sensitive is that transmitter for voice?huh? bcoz i need to put it in domestic AC socket(TŪŪ HIDE) and hear whisper in another end of big room, btw i don't get  eg. if my transistor Hfe is...
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    AC line to work as an transmitter antenna

    so hi... ok i need to put small bug into domestic electric socket(220V) and if i put a bug into that socket,i will have no space to put any antenna,so i think maybe i can connect my antenna to..em... phase or "hot" wire through small capacitor,so that it resistance would be 50oms for about...
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    simple FM transmitter.

    http://www.electronics-lab.com try to search there
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    micro wind generator

    so.. Summer is comming and i will spend about month in my grandfather village(u can call it farm) so and I with my cousin had been buit something like tree house but just not in tree,near small lake,and sometimes we go there to make camp fire,drink some Vodka or beer ... ok ... so there are no...
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    Help with transformer

    take U multimeter,set it to measure current,and then touch multimeter contacts to transformer output ;) P.S---DO NOT DO WHAT I SAID 
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    Decreasing bug antenna size

    i know that 170cm is about 1/2 of wave lenght and it's enough to make 1/4 wl.but as i say it's still too long/big for few cents coin size bug..., ok nomatter i just turn almost all antenna to coil and left outside only about 10cm.  thanks
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    Decreasing bug antenna size

    what do u  want to see? 75% of 1m wire  turned into air-core coil?, it's my bug sch http://www.talkingelectronics.com/FreeProjects/FM-Bugs/Wasp/Wasp-P1.html,i chandeg the board into smd.....
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    Decreasing bug antenna size

    :) i think its not big matter where to put antenna(pcb,žšč,ūkė ant that...) ☺ but what about energy losses?shorter transmitting distance?(and please do not philosophize about receivers(walkman radio and .  )
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    Decreasing bug antenna size

    so i planning to build small SMD FM bug,and probbably biggest problem is the antenna size,1m wire is too long,so i was thinking:if i would make little coil from part of my antenna wire?m? just like in that cheap radio control car models  ???
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    200W Audio amp by kemo kits

    hm....  but if would increase base voltage for transistors(change 2.2Om resistors to higher resistance) and choose higer Hfe transistors, + connecting not 4 but 8transistors(T1 with same transistor,T2 with his twin.. and so), so they should not make extreme noise by that 120w... hm?
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    Who invented the transistor, really?

    offcourse russian invented it, but every time they do not patent it.. and some european sow this and made his own patent... p.s. i'm not russian
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