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Home Theater Automatic Cooling
This project is a small automatic cooling system for home theater rack. It supports 2 temperature sensors for different zones in the rack and 2 12V PWM fans (standard for PC case cooling).
There is a power switch connector for a switch mounted on the casing (will be designed and 3D printed later). A reset button is provided mostly for reprogramming purpose. There are 4 buttons for setting up temp...
home automaion
https://www.youtube.com/msexperiments
Poor's Man Digi Mode
Auto PTT on signal (useful for digital modes like RTTY / PSK / FT8).
...
Automatic_Audio_Switch_V2.0
This project is an automatic line-level audio switch.
It has 2 line-level inputs and 1 output.
When there is no signal on input 1, input 2 will be on the output.
When a signal is detected on input 1, the relais will switch the input 1 to the output.
Then when there is no signal on input 1 for about 15 seconds, the relais will switch again to input 2.
Automatic plant watering circuit
This is a simple circuit powered by a 741opamp. The relay does the switching of the pump or adapter of the water pump. It's a 230V/12V switching relay. Here you can find the schematic and the PCB layout also.
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如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程，下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
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