There's no picture. Is it round or square?
http://www.kpsec.freeuk.com/555timer.htm#monostable If you're inclined to build kits rather than design your own circuits, these guys aught to be...
Case in point. [IMG] This work light I built before I started messing with switching supplies runs off of a 32 volt PSU from a printer. It has...
Method 1: Boost switching supply. BOM: 28 components and 1 PCB, $34.72 with S&H Time: 7 hours calculations, parts selection, PCB layout, SPICE...
I don't believe your calculations are valid. A single D battery is about 12,000mAh or 12 amp hours at 1.5 volts. An LED runs at 3.5v, 20mAh; 60...
Correct. It also provides an opportunity to have a 3 level selectable brightness setting. Do you have reason to believe it would be anything...
Soldering fly leads to an SMD still requires a small tip temp-reg'ed iron and a lot of experience. If it is an integrated MOSFET (like the one you...
I completely agree. The theory was for the benefit of cpemma, and thus off topic. I didn't start it though :D Since they "Just want it to work"...
(One post up, wow) With no offense to frojoe or Sushi Warrior, a buck, buck-boost or constant current source is not a realistic project for...
Let's put it another way. The Watt is the SI unit for power, i.e. 1 Joule / Second. 1 amp flowing through a diode with a 1 volt drop = 1 watt...
I did read the datasheet; You have confused maximum dissipation with nominal dissipation. Maximum dissipation is a measure of current capacity as...
Okay. Lets start with the gas gauge light. The 339 comparator with a 555 timer would be the way to go here, but if you have already the other...
You could try something like this http://www.amazon.co.uk/Colors-300W-Micro-Power-Supply/dp/B000O36ZWK for £17 [IMG] EDIT: Wait, what mods are...
For a 14 gauge standard 4 pin molex connector the limit is between 500 and 1000 sets of series LEDs. BTW, you should be able to run all 6 red...
If it were the good old days/this wasn't your first post I'd say :search: but since I seem to be in the mood today... USB 1.1 has a published...
To answer my own question, here is a 1800A surge, 200A continuous bridge rectifier 844-200MT40KPBF for $100 Here we have a 250A surge, 20A...
This, however, is an accurate statement. A diode will either drop it's forward voltage, or not conduct. However if you reduce the current through...
Incorrect. :sigh: Let's learn something, shall we? Resistors are intentionally inefficient conductors, but conductors none the less: their...
If you are running it off a battery, you don't want to be dissipating 400mW * 3 as heat! Much better solution is to get two 1A rectifying diodes...
Depending on how adventurous you are, you can technically run 70 LEDs in series directly of UK power (240vAC) with no other circuitry whatsoever...
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