Quick question. I purchased a few 12 LED Clusters (red and white) for orientation on my CS8...power requirements: 4.8~6v (JR connector) and two additional LED strips...power requirements: 4~12.6v (JST connector) Can I power the 12 LED clusters through the radians or another 5v output on the copter? And as far as the strips are concerned, what would be an ideal power supply...flight board? I did purchase a small 850mAh 2C 7.4v battery, I'm assuming that I'd need a 5v resistor like thins one if I were to use it for the clusters? http://www.quadrocopter.com/DCDC-Converter-for-Flight-Controller-ME_p_59.html I just don't want to see any white "puffs", so I figured I'd ask. Thanks!
Can you check the specs for the LEDs to see if they already have resistors? Many do these days. Then it's just a case of providing the correct voltage, so you can use a 5v Regulator -- normally you need the battery to be at least 1.4 volts greater than the voltage you want to come out of the regulator, as I recall. Whether you can use the ARCH DC/DC converter is determined by the amount of current the LEDs will need. It will provide 1 Amp at 5 volts. Andy.
Thanks Andy. Theres not a lot of spec info provided, but its straight wire soldered to the back, assuming no resistor...unless its nano technology and I just can't see it...or are those small "181's" actually the resistors? Link to the supplier: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=17189 And a pic...
Check out the comments on that link you sent Chris. 130 mA @ 5V (s_mack on 10/26/2012) And it apparently has resistors on the board....(see BUNDY's comment on 5/19/2012). Andy.
It was all new to all of us once. Don't hesitate to keep asking or searching on the web. For example, when Gary wrote 181 above, I wondered what those were. So I did a Google search surface mount component markings Et voila: http://www.marsport.org.uk/smd/mainframe.htm Look up 181. Edit: Sorry....did mean to actually make you do it: They're Zener diodes. Resistors are marked differently as shown here in Figure 22 (lots of scrolling to get there): http://www.analog.com/static/imported-files/rarely_asked_questions/moreInfo_raq_resistors.html That said, take what you find on the Internet with a grain of salt -- cross check to see if those 181's really are zeners. If in doubt ask Gary or Brad on this forum. I'm often wrong, but because I write with an English accent I therefore sound smarter than I really am. (Huh?) Andy.
Andy you are spending way to much time in the dark editing bay. We have to get you back to the light.... Your Figure 22 above says Figure 22 Surface-mount resistor marking. The numbering is first two digits followed by a third digit which is the number of zeros. So a 181 is 18 plus a 0. If it were 182 then it would be 1800 ohms. You can see them on the LED strips, like the ones from QC. Those are 331's so 330 ohms. For everything useful about LED's and the forumla for the size of the resistors required see http://www.kpsec.freeuk.com/index.htm. And soldering these little things is a pain in the Arse. Wait until you build a PCB Extension Board...
Like living versions of Encyclopedia Britannica and Wikipedia....you two guys make my head spin (incredibly helpful)! I learn something new every time I read this forum...which is daily!