This is a small electronic piano made with a 555 timer, which can make a very good sound, and you can use it to play a piece of music you like. Before you start, make sure you can understand the circuit and know how to solder. The first step: the required electronics 555 timer 100K (or larger) potentiometer 4K7 (or smaller) potentiometer 10K potentiometer 2.2K resistor (12 pcs) 4.7K resistor 8Ω speaker Two-way slide switch One LED + one 470E resistor 14 micro switches 100nF capacitor 10uF capacitor 9V battery with wire Hole board (10X15cm) That's almost it. Step 2: Test on the breadboard According to the circuit diagram, connect all the components on the breadboard, and then test whether it is normal. You don't need to install all 14 buttons, just install 4 or 5, mainly for testing. 555 keyboard.sch (open with EDA software) The third step: welding to the hole board If there is no problem in the previous test, you can solder. A big hole board is used here, the purpose is to put the battery and speakers on it. You can also choose a smaller one. The layout of the components here is for reference only. You can also make a more reasonable layout according to your own situation or the convenience of the buttons, but you must follow the circuit diagram. 555 synth.brd (PCB design drawing) You can do the welding in the following order: 1. Fixed buttons 2. Add resistance to the button 3. Fixed 555 4. Build a circuit around 555 5. Connect 555 to the button 6. Connect the speakers 7. Connect the battery wiring 8. Check the entire circuit 9. Connect the battery to test. Step 4: Tuning & Performance After the circuit test is no problem, you can add a protective shell to your keyboard. Before playing, you may also need to tune it with a potentiometer. The 100k potentiometer is used to adjust the next 9 keys (next to the 9 high-pitched keys of the 100k potentiometer). These 9 keys must sound in sync. After the 9 keys are adjusted, the 10K potentiometer can be used to adjust the 10th and 11th keys, and the second 10K potentiometer can be used to adjust the 12th to 14th keys. Now you can play a song with your own electronic piano!
Bitcoin mining equipment is mainly highly specialized ASIC mill , The maximum computing power of a single miner is 110T/s( Ant S19Pro mill ), The scale of computing power of the whole network is 120EH/s above . Ethereum's mining equipment is mainly graphics card mining machine , Professional ASIC Mining machines are very few , On the one hand, it is because of the of Ethereum mining algorithm [ resist ASIC sex " Improved R & D efficiency ASIC The threshold of the miner , So how much do you know about the mainstream Ethereum mining machine ?
Ethereum mining algorithm has higher requirements for memory , The purpose of this design limits ASIC The use of chips in Ethereum mining . From the results , Most Ethereum mining machines are graphics card machines , This reflects the application of Ethereum mining algorithm ASIC Success on . From the absolute value of computational power scale , The computing power of Ethereum is about 200TH/s, The computing power of bitcoin is about 120EH/s, The latter is close to the former 60 ten thousandfold .
ASIC Mining machines have high computing power , Large power consumption , Like the latest ant S19Pro mill , Rated power consumption is 3250W, Need to consume... Every day 78 Degree electricity , According to the current currency price and 0.23 The electricity price in wet season is RMB , The proportion of electricity charge is 30.68%. Other older bitcoins ASIC mill , Like ants T17 series , The proportion of electricity charges generally exceeds 50%. by comparison , The power consumption of the graphics card miner is low , The proportion of electricity is also low . such as 5600XT8 Graphics card miner of card .
Ant S19-95T It adopts aluminum alloy profile electromechanical integrated design , Parallel four fan structure . According to the measured data , In line with and better than the official data .S19 The series is provided by TSMC 7nm chip , A new generation of customized chips with perfect whole machine architecture and high conversion rate APW12 Power Supply , Reduce power loss during conversion , Use more energy-saving , Greatly shorten the return cycle of the miner . In addition, the newly upgraded mining machine operation interface is also more humanized , Real time computing power . The average computing power and the operation of each chip are clear at a glance .
Shenma mining machine M30S-86T/88T/90T, Bit micro 2020 Launched in 2013 M30S Series of new mining machines , Announced that it would M30S The series is expanded to three 3X product . stay 3X In the new standard , Bit micro promises a one-year warranty for its series of products . This series of mining machines are provided by Samsung 8nm chip , Among them, god horse M30S series , The power consumption is 38J/T, Provide higher computing power , Lower power consumption and high stability.
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