Commonly used MCU module circuit sharing (mainly communication circuit)

When we design the electronic circuit of the single-chip microcomputer, it is often applied to the more commonly used circuit. Every time it is re-typed, it is laborious and troublesome, and it is easy to make mistakes. Therefore, I design the circuit that I use commonly as a module, and I can use it every time. Imitate to watch.

1. Dual 232 communication circuit: 3-wire connection, corresponding to the female, working voltage 5V, you can use MAX202 or MAX232.

When we design the electronic circuit of the single-chip microcomputer, it is often applied to the more commonly used circuit. Every time it is re-typed, it is laborious and troublesome, and it is easy to make mistakes. Therefore, I design the circuit that I use commonly as a module, and I can use it every time. Imitate to watch.

2. Transistor serial communication: This circuit is built with a triode, the circuit is simple, the cost is low, but the problem is generally very good at low baud rate.

When we design the electronic circuit of the single-chip microcomputer, it is often applied to the more commonly used circuit. Every time it is re-typed, it is laborious and troublesome, and it is easy to make mistakes. Therefore, I design the circuit that I use commonly as a module, and I can use it every time. Imitate to watch.

3. Single 232 communication circuit: three-wire mode, which is completely equivalent to the above three-stage pipe.

When we design the electronic circuit of the single-chip microcomputer, it is often applied to the more commonly used circuit. Every time it is re-typed, it is laborious and troublesome, and it is easy to make mistakes. Therefore, I design the circuit that I use commonly as a module, and I can use it every time. Imitate to watch.

4. USB to 232 circuit: PL2303HX is used, the price is cheap, and the stability is not bad.

When we design the electronic circuit of the single-chip microcomputer, it is often applied to the more commonly used circuit. Every time it is re-typed, it is laborious and troublesome, and it is easy to make mistakes. Therefore, I design the circuit that I use commonly as a module, and I can use it every time. Imitate to watch.

5. SP706S reset circuit: with watchdog and manual reset, the price is cheap (the letter is much more expensive), R4 is for debugging, and R4 is soldered after debugging.

When we design the electronic circuit of the single-chip microcomputer, it is often applied to the more commonly used circuit. Every time it is re-typed, it is laborious and troublesome, and it is easy to make mistakes. Therefore, I design the circuit that I use commonly as a module, and I can use it every time. Imitate to watch.

USB Charger Camera

Many people do not know what kind of cameras are invisible cameras, and do not know how to distinguish invisible cameras, so here is how to distinguish invisible cameras.


Invisibility, as the name suggests, means that it is not easy to be seen or found, so where do such cameras exist? In fact, invisible things are hidden by the external environment, so they will not be discovered. Such invisible cameras are generally hidden in things that are more difficult to see, such as: inside the socket, inside the TV, inside the stereo, inside the fan, etc. Cameras can be hidden in various household appliances. Why should they be hidden in electrical equipment? The main reason is that these equipments have power supply and will not be used because the camera cannot be powered.

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