Alarm clock - the most self-abuse invention in the history of mankind, the guy who loves and hates sleepy men, like black and white impermanence, takes us away from the gentle town, how many dreams are dying out in its call-like voice. However, how many times has successfully roused us and avoided all kinds of tragedies caused by late arrivals. For the office workers, they saved a few hundred dollar bills at the end of the month.
However, even the most powerful alarm clock in the world, there is always a time of failure. Because sleepy men's sleep is not covered. Years of anti-war have already been practiced, and no one can stop them from pursuing art.
To this end, a variety of strange alarm clocks have been born, its duty is to let sleepy men wake up. I believe that many sleepy men have had similar experiences. When reading or working, the first thing to wake up every morning is to let the damn alarm clock shut up, and then wash your teeth and wash your teeth. But they have to go back and forth. Adjust the alarm clock again before going to bed every night, in case the next day is late for the tragic face of the iron class teacher or the terrorist BOSS.
I must have read the album about demolishing bombs. If you see a similar object around you when you wake up in the morning, what would it feel like? Ok, you will also have the opportunity to experience this feeling, and the cost does not need to pay for your life, but your sleep.
Material preparation: a 2 cm diameter hot water pipe, the price is more than a dozen, available at hardware stores. (for DIY model detonator)
Cut into seven 20cm for later use.
I drew the outer packaging drawings of the TNT bomb myself. A4 printing paper TNT detonator drawings three spare. It is best to have high-gloss photo paper, so the effect is more YY, more realistic.
Each A4 drawing is cut into four equal sizes, and the back is covered with a double-sided tape to paste the propeller (hot water pipe).
Ok, let's wind up first, then the DIY TNT detonator clock circuit. Children's shoes with electronic foundations can consider buying their own DIY materials. Below are the necessary accessories and circuit diagrams. Children's shoes without electronic foundation can also buy the finished module directly on Taobao.
One is the 99-second countdown circuit device, which counts down after 99 seconds. }
Countdown alarm connection diagram after 99 seconds 
Countdown alarm circuit diagram after 99 seconds 
The other is a simple electronic clock. Support for hourly chime, you can set an alarm.
Simple electronic clock connection diagram 
Simple electronic clock circuit diagram 
It took several hours to fly the panel display after flying the wire
Then put the DIY TNT detonator model under the four up and three stacks, and bundle them with black electrical tape. Tie the board to the model detonator with a tie.
Hey, a TNT time bomb was successfully made. In order to pursue realistic effects, cut a piece of network cable and pull out the small copper core inside. Use a screwdriver to make a turn around the corner.
Next, fix a few small copper wires around the board between the board and the detonator model. 
This is done. A realistic TNT detonator bomb model alarm clock was released.
Power supply problem: The fabricated circuit board can be powered by USB or by three 1.5V No. 5 batteries. The battery fits just inside the hot water tube with a diameter of 2 cm.
After the power-on test is correct, the model detonator is bundled, and the circuit board is tied to the detonator with a magic strap. After a section of the network cable pulled out a few small copper wires around the corner, a horrible TNT clock bomb was completed.
The 7-inch tablet can be used as the golden size of a tablet computer. It is small and portable. It can be used at home and outdoors. You can browse the web, watch videos and play games. It is a household artifact. Although the size of the 7-inch tablet is inclined to the tablet, the function is more inclined to the mobile phone, so it can also be used as a substitute for the mobile phone. Compared with other sized tablets, the 7-inch tablet has obvious advantages in appearance and weight. Both the body size and the body weight have reached a very reasonable amount.
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