| Forum Home | ||||
| Press F1 | ||||
| Thread ID: 86339 | 2008-01-13 06:49:00 | COMPAQ Presario Case Mods | SurferJoe46 (51) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 629930 | 2008-01-13 06:49:00 | Got that seemingly dead COMPAQ running with a new PSU . . and the front case is so BIG and BULBOUS . . . . that is hollow, translucent and just NEEDS some LEDs in it . What type of lights should I look for? I had bought some 5 VDC LEDs for a different project . . but they burned out in about a day or so . I used the 5V rail from the PSU . . . but it must've been wrong . It's a COMPAQ Presario 5BW, 5000A Series case . This town has no real places to buy case mod parts either . Radio Shack is here in two stores . . but that's about it . |
SurferJoe46 (51) | ||
| 629931 | 2008-01-13 07:23:00 | Post a pic when you get it going. | RusEvo (3572) | ||
| 629932 | 2008-01-13 07:41:00 | I'd change the entire case. | pctek (84) | ||
| 629933 | 2008-01-13 08:09:00 | Hi Surfer Joe Judging by your statement about "5 volt LEDs" burning out it is obvious you do not know how to use LEDs correctly. They must be connected to a resistor of the correct value, following a well known mathematical formula. To help you understand, click HERE. (www.allelectronics.com) Hope this helps. BURNZEE A BAD DAY FISHIN' SURE BEATS A GOOD DAY AT WORK!! |
Burnzee (6950) | ||
| 629934 | 2008-01-13 09:28:00 | Like this? (don't have much eh)www.radioshack.com | feersumendjinn (64) | ||
| 629935 | 2008-01-13 16:05:00 | Like this? (don't have much eh) . radioshack . com/product/index . jsp?productId=2271470&cp=&sr=1&origkw=lights&kw=lights&kwCatId=2032061&parentPage=search" target="_blank">www . radioshack . com The two stores here are mostly in to cellphones and HDTV and stuff like that . . . there is very little in the line of case mod products . . they just stare at you with unbelieving eyes . I tell them that the stuff is available and in the catalog, but they don't seem to want to order things for you . I had bought the LEDs from them, they were all marked 5 volt and since I have a 5 Volt rail . . I just wired them in . . why a resistor? The voltages are extre-e-mely close and who can ask for a better stable voltage than you can get outta the PSU? This is exactly the same bulb I used: . radioshack . com/product/index . jsp?parentPage=search&summary=summary&cp=&productId=2102850&accessories=accessories&kw=leds&techSpecs=techSpecs¤tTab=summary&custRatings=custRatings&sr=1&features=features&origkw=leds&support=support&tab=features" target="_blank">www . radioshack . com . . and here's the specs: # Size: T-1-3/4 or 5mm # Typical voltage: 5 . 0, with a maximum voltage of 6 . 0V # Typical wavelength: 430mm # Typical MCD: 300 # Viewing angle: 24° # 30mA (max) # Color: Blue emission # Sold in package of 1 There is a Fry's store in Chula Vista 65 miles/105 km and one in Escondido . . about 40 miles/65 km away . . so it's not like they are even close . I try to go there once a year at least . BTW: I am getting that prize I won (I didn't even enter for it) . . . remember the MOBO choice I had to make? It should be here in the next few days . |
SurferJoe46 (51) | ||
| 629936 | 2008-01-14 01:47:00 | Hi The problem here is not your supply voltage, 5v, but the maximum current - 30 ma. This has clearly been exceeded. Did you wire the Leds in parallel, (across each other) or in series, (first connected to the second, second to the third and so on, each by one lead)? How many Leds did you wire in? BURNZEE |
Burnzee (6950) | ||
| 629937 | 2008-01-14 04:11:00 | I had 6 of the blue LEDs, in series...does that work OK? | SurferJoe46 (51) | ||
| 629938 | 2008-01-14 10:06:00 | Hi Surfer Joe Wiring six blue LEDs in series with a 5V supply simply won't work. The voltage drop across each one would be typically about 4.5 volts. May be your LEDs are not burned out but simply were wired wrong to begin with. Here's hoping. The way I would do it, is to connect each LED to a 22 ohm resistor and then wire them in parallel. This gives an estimated current draw of approx 25 ma. If you want them brighter try 18 ohm resistor but no lower. This gives estimated draw of 30 ma which is max. Remember this is drawing power from your computer. You may not like the idea of resistors but believe me they are required and do not cost much. Anyway, hope this helps. If you need any further help don't hesitate to ask. BURNZEE |
Burnzee (6950) | ||
| 629939 | 2008-01-14 15:20:00 | Hi Surfer Joe Wiring six blue LEDs in series with a 5V supply simply won't work. The voltage drop across each one would be typically about 4.5 volts. May be your LEDs are not burned out but simply were wired wrong to begin with. Here's hoping. The way I would do it, is to connect each LED to a 22 ohm resistor and then wire them in parallel. This gives an estimated current draw of approx 25 ma. If you want them brighter try 18 ohm resistor but no lower. This gives estimated draw of 30 ma which is max. Remember this is drawing power from your computer. You may not like the idea of resistors but believe me they are required and do not cost much. Anyway, hope this helps. If you need any further help don't hesitate to ask. BURNZEE Then that's what I will do...I'll try to drop by Radio Shack today after I get back from Idyllwild. Thanks. |
SurferJoe46 (51) | ||
| 1 2 | |||||