A 21 year old guy had worn a pair of contact lenses during a barbecue party.(An event or meal at which food is cooked outdoors over an open grill or fire) While barbecuing he stared at the fire charcoals continuously for 2-3 minutes. After a few minutes, he started to scream for help and moved rapidly, jumping up and down. No one in the party knew why he was doing this?
Then he admitted into the Hospital, the doctor said he’ll be blind permanently because of the contact lenses that he had worn. Contact lenses are made by plastics, and the heat from the charcoal melted his contact lenses.
DO NOT WEAR CONTACT LENSES WHERE OVERHEATING AND FLAMES ARE CONCERNED…. OR WHILE COOKING…!
Spread this around because this sounds terrible as fuck!
your fucking eyes would dry up before your contacts melted
you would die
This is bullshit, I’ve stared into campfires wearing contacts for way longer with no problem.
Getting there! Finished working on the top case, fitting the binding posts and pots into place. I got all the holes drilled for the switch, fuse holder, and power cable and those will be installed next. I’m so close to finishing and it’s great how well everything is coming together.
The South African Denel-Mechem NTW-20 is a 20mm anti-material rifle and arguably the world’s most powerful sniper rifle. Its 20mm cartridge is 50% larger than the .50 caliber and has an effective range of over 3,000 yards.
The NTW-20 is a South African anti-materiel rifle or large-calibre sniper rifle, developed by Denel’s Mechem division in the 1990s. The weapon was designed by Tony Neophytou and intended for deployment against a wide variety of targets, including parked aircraft, telecommunication masts, power lines, missile sites, radar installations, refineries, satellite dishes, gun emplacements, bunkers and personnel, using a range of specialized projectiles. The NTW-20 in 20 x 110 calibre is a new version of the weapon. The accurate high explosive capability makes it extremely effective in the counter-sniping role, where indiscriminate fire from weapons such as mortars and rocket launchers is completely unacceptable. The new NTW 20 are now offered in 20 x 110 mm Hispano calibre. This calibre is highly efficient in terms of velocity, penetration and target effect.
Cartridge: 20 x 83.5 mm MG151
Operation: manual bolt action
Feed: 3-round detachable box
Weight - Empty: 26Kg - 57 lbs
Overall Length: 1,795 mm
Rifling: 1 full turn in 560 mm.
Length of barrel: 1,000 mm
Muzzle Velocity: 720 meters/second
Muzzle Energy: 28,500 Joules
Accuracy: 2,000 Meters +
I see now where Bungie got the design for Halo’s sniper rifle…
Today, I bring this week’s, as well as last week’s, update on my DC power supply. Last week, I soldered all the rest of the components on the motherboard as well as the transformer and wires for the switches, sockets, etc. Then I went on to soldering the mounting brackets for the 28 pin LED display and the rest of the tiny surface mount resistors and caps on the daughter board with the time I had left.
This week, I soldered the bracket for the 40 pin DIP for the display onto the daughter board and the white wire. Also not pictured; I added the heat sinks to the voltage regulators. With all the components soldered, the boards are pretty much done, now it is time to work on the case. I drilled the holes for the pots and terminals into the case and I have started the rectangular hole where the LED display comes through with the nibbler (that sonuvabitch hurts my hand!) before class finished today.
Progress! This time I soldered a bunch more components on there. All the surface mount capacitors are done, including those two tiny little suckers in the first picture. I compared C15 (10000pF ceramic cap) to a dime, it is the smallest component in the whole project with C13 (already soldered to the board in the same picture) in close second. After that it was the two trimmer pots (blue boxes in second picture) turn to be added to the board, these are what calibrate everything when the project is all put together. Next was the four voltage regulators, I deemed it wise to not add the heatsinks to them yet as there are components that need to be added yet within close proximity to them, ergo the heatsinks would really get in the way. Lastly, I soldered the first of the through-hole resistors (R1, a 220Ω 1/4watt resistor) before it was time for cleanup and head off to my next class.
I decided that I’m gonna document my final project in my Electronic Construction Techniques course.
For this project, we are building a 15 volt DC power supply from a kit put together by the instructors. In the first photo, I just laid out all the components on my workstation and referenced my parts list to make sure I had everything which included two printed circuit boards (the large main power supply board and a smaller board for a digital display), a transformer, and a whole bunch of smaller components (resistors, capacitors, voltage regulators, what-have-you). I then drilled all the sockets for the through-hole components on both the large and small PCBs where all the through-hole components are placed. Once finished with that, I had barely enough time in class remaining to solder the first three surface mount capacitors (as seen in the second photo).
I have this class on Mondays so expect updates around then.
So I went to the Packer game last night with my brother and we decide to walk around Lambeau Stadium. It so happened that the Xbox One truck was there and I had to check it out. The controller feels great and I can’t wait to get one for my PC.
Though I’m still in favor of the PS4 (because it’s what I’ve been planning to get in the first place), the Xbox One definitely appears to be a pretty good system.