!
Posted by renesis at 17:25 | permalink | 0 comments
lordpil's blog
1.24 for a 2500 reel
tekrad: hi
pwm current regs
Posted by renesis at 15:14 | permalink | 0 comments
$1
prob not much
they prob saturate if they dont get enough current
it might just be a ref
maybe they say...
1.4V dropout
mine was like $3, no...
yeh
Posted by renesis at 15:09 | permalink | 0 comments
yeh
i dont care so much for this
oh weird
look at figure 9 they have a pwm circuit
wtf is pin4...
oh haha
theyre switching the ground
thru a 2n2222
2n2222 is like .10 probably
i think they are more than 3904
oh
yeh that prob works
yeh do that shit thats def erotic
Posted by renesis at 15:04 | permalink | 0 comments
i really like that cat4101 thing
.5v dropout
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CAT4101TV-T75CT-ND
linear pwm current driver
im haxing a big led onto our stroboscope at work
i built a 317 current reg switched with a darlington at work
that shit did pretty square current pwm with sine wave input way past 10KHz with no attenuation
im gutting the strobe lamp and it has some nice heatsink surfaces
so like efficiency and dropout dont matter
i need to see if it works past 1KHz with like no duty pulse
if it craps out im prob going to get that
and just do a pcb
that = cat4101 thing
Posted by renesis at 14:59 | permalink | 0 comments
hi wat
uhohz
sucks
neat
all these fucking led drivers are smt
sometimes i hate being in the future
you you need like square tube for that to work
square tube is awesome but angle iron is pretty hardcore
you can use the extra pieces for braces or something
Posted by renesis at 14:53 | permalink | 0 comments
this is just for a big led driver with convienient input or what
heh, are you doing a 10W combined discrete RGB?
a LDO reg with a .25V ref and like 2A max would be the shit for this
wait what leds
9 * 3W ?
that would be epic
youd have to sell them with a warning
Posted by renesis at 14:48 | permalink | 0 comments
whats happens if you set diff values for each output
just adds them no drama or what
i wonder if the 5W are worth the extra $15
Posted by renesis at 14:43 | permalink | 0 comments
i want something i can point to point wire tho
tho these linear things are looking sex so maybe i just do a pcb on tinkerbelle
macegr: can you pwm that?
so you need that plus a switch
neat
Posted by renesis at 14:38 | permalink | 0 comments
mine is like, GND, PWM, LED_SINK
they need to put my shit in a chip
macegr: heh
i didnt catch it at first
linear?
yeh i think LM317 are pretty stable with temp
i wonder what kinda dropout those things have
mine need a darlington drop + LM317 ref + LM317 dropout
thats like 5 or 6 V right there damn
maybe i should use a logic nmos
well it doesnt matter for my thing i guess
Posted by renesis at 14:33 | permalink | 0 comments
one of the led driver topology options is 'smart'
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=CAT4101TV-T75CT-ND
something like that
something without the vin and reset pins would be more awesome
Posted by renesis at 14:28 | permalink | 0 comments
what
you lie
if this were true youd be the most powerful engineer on the planet
gov would have to split you up into smaller macegr
so where did you find it?
if its public they will prob change or remove it =( =( =(
oh neat
omg
OMG
kevtris: IT WORKS
DO IT
Posted by renesis at 14:21 | permalink | 0 comments
okay yeh
you need low ref part
some adjustable LDO will have like .5V reference
wat
so you have to clk in 4 bits for every cycle?
oh
hmm
i just need the current driver tho
because we have the triggering circuit to control the pulse timing
Posted by renesis at 14:16 | permalink | 0 comments
heheh the engineer asked me 'this will cost under $100, right?'
so the $20 5w star is prob ok!
for current reg?
hmm
do you mean the mosfet in the current reg circuit or or mosfet in the switching circuit
no strobing
kinda
okay its like 8 diodes as my power led simulator
going into the LM317 input
then output goes thru a 2.7R resistor to the ADJ pin
thats the current reg part
the ADJ pin is connected to the collector of the darlington
1.25V * reg current
is power
and do you mean using LM317 as a vreg?
im not doing that this is simpler
Posted by renesis at 14:11 | permalink | 0 comments
wonder what twingy wanted
thats neat hes still alive
so i got 88% on my trig final
all i have to do is rework that psych paper and im mfkin done
\o/
also LM317 seems to work pretty okay as a current reg @ .5A switched @ 1KHz+
that shit didnt start attenuating current till like 100KHz, and i just realized i left the generator driving the darlington in sine mode
so like decision now is 3W luxeon star or 5W
Posted by renesis at 14:06 | permalink | 0 comments
i think they just use those diodes
.33 10W output transistors
er, resistors
just do foxit
adobe locks up on my dual core notebook at work
Posted by renesis at 01:49 | permalink | 0 comments
not that old
i feel like this convo has happened before
o
Posted by renesis at 01:44 | permalink | 0 comments
inittab: stingray 1 or stingray 2?
i dont like the older stingrays
i think Vbe goes down with temp, no
i wonder how they did the AB base bias
one is all it takes
Posted by renesis at 01:39 | permalink | 0 comments
hahaha @ block diagram on the top
we have an old brit class-d amp like that
well, yeah
everyone knows its crap
but id def rather have peavey crap than behringer crap
behringer has a dsp crossover for like $350
i wont buy it =\
is that shit 4u?
i bet its mostly huge EI transformer
to-3
more circuitry done with wires
prob not
Posted by renesis at 01:34 | permalink | 0 comments
i mean they destroy themselves eventually
i kinda like our amps
http://www.guitarcenter.com/Cerwin-Vega-CV-2800-Power-Amplifier-480999-i1322486.gc
all our products i think those are the sexiest
id get a discount
http://www.guitarcenter.com/Cerwin-Vega-CV-900-Power-Amplifier-481024-i1322488.gc
peavy, yay
i have no rational reason for liking that company but i have since i was a kid
damn @ price
Posted by renesis at 01:29 | permalink | 0 comments
need megahuge amp
heh, abusing speakers for work is kinda neat
i want to find a job like that
like for the weekends
well
im ass backwards id do the dj thing because i want to have the sound system
id have to justify it somehow and make it pay for itself
dude you left a motor mount insert out
this is just karma
did you sell that car? heheh
eh
so yeah maybe i could rent out my soundsystem to djs
this would be the least drama
limiters ftw
pffft
no id rent myself with the system
speakers getting fucked up is life, shrug
Posted by renesis at 01:24 | permalink | 0 comments
pharkus: i could see that just vibrating out
normal fuse
pharkus: set screws with lock nuts with lock washers
we have an amp that pulls more than 15
they wired it right into the 50A service because they were afraid it melt the wall outlets we breakout the 50A lines with
4kw china amp, feer
we have megahuge speakers to test for thermal rating purposes
Posted by renesis at 01:19 | permalink | 0 comments
ive never set a car on fire =\
my loser dad did that to his 914
oh
thats hardcore!
fuck a car fire, but an amp fire, that means youre alive
hahahahahaha
thats awesome
i dunno theyre not glass, plastic usually catches fire
might have been the fuse contacts wearing out because of vibration
its not gonna catch fire like that
speakers wear out connectors
Posted by renesis at 01:14 | permalink | 0 comments
=O
wrench too long
maybe the relay welded closed?
Posted by renesis at 01:02 | permalink | 0 comments
haha sounds like stu
heh
my crx came with a plywood donut as a motor mount insert
heh
it was covered in grease =\
looked like rubber until i degreased the engine
haha what
Posted by renesis at 00:55 | permalink | 0 comments
Top | Add to Technorati Favorites
© 2007 lordpil. XHTML 1.0! CSS! Site design by GNAA Blog Engine by pbx | MULTI2 | ian hanschen | lolwat