Comments for Hacked Gadgets - DIY Tech Blog

Comment on DIY UV LED Double Sided PCB Exposure Box by Dr. Mario

Dr. Mario — Sat, 04 Jul 2009 00:28:29 +0000

Not true. LEDs are more effecient than fluorescent, there are few reason: Some switching ballasts can consume more than 4 Amps, just to stuff 20 - 100 milliAmps into UV fluorescent tube (while LEDs only eat 3.5 Volts at 20mA Powerful ones, like Cree XLamp, sucks around 350mA). Blacklight fluorescent just simply waste a lot of electricity by just emitting vacuum UV and/or Infrared (Yes, there are some IR in there.) that Phosphor refuses to convert to UVA (375nm UV). Also, it simply get so hot, to some point it would require fan cooling, if left on way too long.

Also, adding the insult onto injury, Blacklight fluorescent would just conk out after 2,000 Hours and is easily breakable.
UVA LED are, in fact, better than the fluorescent, why?
Life exceptancy, and safety of High-voltage handlings. No need for nasty 340 Volts AC just to light that up. And, 365nm UV LEDs are cheaper if you just look harder.

Comment on Name the Thing Contest - 93 by Mike

Mike — Fri, 03 Jul 2009 23:31:33 +0000

Be patient; it often takes 1-2 weeks to find out the winner.

Comment on Human Camcorder by jim

jim — Fri, 03 Jul 2009 23:05:51 +0000

its fake or a viral add for somthing, watch vid 1 he jumps from bus 1 to bus 2 and stays standing up and looking ahead!! if you then look closly at vid 2 (headcam) he seems to land and slide!! maybe im wrong but it seems that way to me

Comment on Human Camcorder by yon

yon — Fri, 03 Jul 2009 22:12:47 +0000

mirror’s edge? XD

Comment on Loo Log - Washroom Usage Monitoring by Alan Parekh

Alan Parekh — Fri, 03 Jul 2009 21:14:34 +0000

Thanks John.

Comment on Loo Log - Washroom Usage Monitoring by John B

John B — Fri, 03 Jul 2009 20:38:41 +0000

Um, you might want to proofread your submission. If there are more washrooms than people, there is no problem. Also, the only interesting part of this was the graphs, which you didn’t post. (Hint)

Comment on Name the Thing Contest - 93 by kevin

kevin — Fri, 03 Jul 2009 16:57:34 +0000

so, who won ?

Comment on USB Cigar Storage by joe Sixpack

joe Sixpack — Fri, 03 Jul 2009 14:22:12 +0000

nice, but someone could smoke your usb drive

Comment on Big Seven Segment Display by Alan Parekh

Alan Parekh — Fri, 03 Jul 2009 06:59:21 +0000

Hi Peter,

Here is a simple circuit that will do what you want.
http://www.aaroncake.net/circuits/counter.asp

Comment on Big Seven Segment Display by peter chamier

peter chamier — Fri, 03 Jul 2009 05:14:10 +0000

I want to make a counter that cam count up 50 using two seven segmeny displays that can add
and subtract and reset. Hope you can help me.
Thanks Peter