ApochPiQ
New Member
OK, aside from the usual taping-LEDs-to-batteries antics, this is my first serious foray into electronics and circuit design. I'm looking to be educated, so don't feel like you need to be gentle ;-)
I've got an LCD panel I'm interested in tinkering with. According to the spec sheet it draws 4.3W at 8V DC (peak). My first challenge is to actually get ahold of a reliable 8V DC power supply. I already have access to a perfectly adequate 12V supply (specifically, a 12V 1A wall adapter); my thought is to start out with that and hack up something that will give me 8V, and worry about fabricating a more direct power supply later. My eventual goal is a more-or-less self-contained unit, so variable workbench supplies etc. are out of the question.
What I'm not sure about is getting clean power at the required voltage. My back-of-the-envelope work indicates that a simple 2-resistor parallel voltage divider would produce enough heat to flame broil my apartment, so unless I really goofed the math, I'm figuring there's a better solution out there![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I'm working through my copy of "The Art of Electronics" and trying to sort this out as I go, but to be honest I'm running out of patience and itching to get my hands dirty.
So, the heart of the question - what's a good way to get the voltage I'm after? Some kind of zener setup? A regulator IC? Some other bit of wizardry I've not yet learned of?
Any/all input greatly appreciated![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I've got an LCD panel I'm interested in tinkering with. According to the spec sheet it draws 4.3W at 8V DC (peak). My first challenge is to actually get ahold of a reliable 8V DC power supply. I already have access to a perfectly adequate 12V supply (specifically, a 12V 1A wall adapter); my thought is to start out with that and hack up something that will give me 8V, and worry about fabricating a more direct power supply later. My eventual goal is a more-or-less self-contained unit, so variable workbench supplies etc. are out of the question.
What I'm not sure about is getting clean power at the required voltage. My back-of-the-envelope work indicates that a simple 2-resistor parallel voltage divider would produce enough heat to flame broil my apartment, so unless I really goofed the math, I'm figuring there's a better solution out there
I'm working through my copy of "The Art of Electronics" and trying to sort this out as I go, but to be honest I'm running out of patience and itching to get my hands dirty.
So, the heart of the question - what's a good way to get the voltage I'm after? Some kind of zener setup? A regulator IC? Some other bit of wizardry I've not yet learned of?
Any/all input greatly appreciated