k i will tell all the jews
Posted by renesis at 15:33 | permalink | 0 comments
lordpil's blog
yes from internal resistance, as current increases the battery voltage decreases
by adding more batteries, you reduce the current in each, reducing voltage drop out, which increases voltage across the motor (which would increase the current through the motor)
i dont have ltspice on this laptop
mrgoose: probably same effect
Posted by renesis at 14:02 | permalink | 0 comments
put an AC source and check rejection
sweep that shit from dc to light
would suggest putting a BJT souce in the same sim to compare
only reason i prob wouldnt use it is that its going to be more part dependent and more expensive and harder to source
mrgoose: yes
if your batteries arent dropping out significantly during operation, it wont make a big different
Posted by renesis at 13:57 | permalink | 0 comments
i use hot glue almost dailt for little prototypes and adapter things at work
harbor freight has a grommet set thats okay
maybe 6 or 8 sized
*sizes
if you use rubber grommets instead of hard plastic, and its into a metal panel, youre going to want to make sure theres no sharp edges on the hole
sandpaper or file that shit
np!
gets easier
Posted by renesis at 13:40 | permalink | 0 comments
04:25 < renesis> they use it as a source, and its always fixed voltage biased with a zener of vref, except in one case
04:28 < renesis> the exception is a ramp generator, page 7, math is on page 8
04:29 < renesis> it does suggest that it acts a constant current source using the pot as feedback, its your config high side instead of low side but it shouldnt matter assuming you dont drop out the fet
04:30 < renesis> the thing is, how do you set the current, other than experimentation with a given fet and supply voltage
04:31 < renesis> with a BJT sink or source, you explicitely set the voltage across an emitter resistor, which sets the collector current
i would just search octopart.com or findchips.com
are you in a hurry?
grommet thing is the quickest, but if you shop digikey.com or mouser.com for enclosure strain relief, and are really careful about reading the datasheet and ordering the right part, prob get something you can use
yeah hotglue is fine
if youre careful and plan, you can make it look pretty clean and have it be as functional as actual strain relief products
Posted by renesis at 13:35 | permalink | 0 comments
the exception is a ramp generator, page 7, math is on page 8
it does suggest that it acts a constant current source using the pot as feedback, its your config high side instead of low side but it shouldnt matter assuming you dont drop out the fet
the thing is, how do you set the current, other than experimentation with a given fet and supply voltage
with a BJT sink or source, you explicitely set the voltage across an emitter resistor, which sets the collector current
what was the last thing you saw me blog
Posted by renesis at 13:27 | permalink | 0 comments
i get the current sink part i just dunno if transconductance is stable like that
http://www.ixys.com/documents/appnotes/ixan0063.pdf
they use it as a source, and its always fixed voltage biased with a zener of vref, except in one case
Posted by renesis at 13:20 | permalink | 0 comments
im still waiting for your deplation fet question =\
i dont get the circuit how you described it
oh
i think is where the old hackers whip out load lines theyve drawn on traced curves
Posted by renesis at 13:15 | permalink | 0 comments
he wants someplace to try them tho
tip takes way longer costs more money tho
tip typically gets you close to what you want
note that youre the one suggesting paying more
Posted by renesis at 13:09 | permalink | 0 comments
i like you
i dont know of any place specifically, but most electronics parts store will stock at least a couple things like that
frys probably has something, they have bud boxes and other prototype stuff
if the enclosure isnt very thing metal, you can also get firewall grommets at an automotive parts place and then try and do the anti-tug some other way, like zip tie or a knot in the cable
*thin metal
Posted by renesis at 13:04 | permalink | 0 comments
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