51 single-chip learning essence of the single-chip learning board production process

There are a lot of new people asking how to solder the MCU learning board. I should weld the minimum system in person below. The following are the required components and the welding process. It may be more detailed and more complicated. I just hope that I will not play the opposite role. I am very happy. .

1, 10 * 10 million with a piece (lower left)
2, DIP40 single-chip locking seat one (lower middle)
3, reset circuit: there is a button, 1K and 10K resistors each, 10uF capacitor one (lower right)

4, crystal oscillator circuit: a 12M crystal oscillator, two 30PF ceramic capacitors (see left)
5, voltage regulator circuit: a DC socket, a self-locking button, a 1N4007, two 104 ceramic capacitors, two 220uF electrolytic capacitors, a L7805 regulator chip (below)
6. Since the internal circuit of the single-chip P0 has no pull-up resistor, it is in a high-impedance state, so it cannot output high and low level normally. Therefore, when using this group I/O, we need to add a row of pull-up resistors to the P0 port, and the resistor is the first choice. The choice of 103 here is 10K (lower right)

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