STC89C52RC mini system board

Schematic diagram

3D diagram

Food pictures:

Introduction to onboard resources

*Button*2

* rgbled*1 + ordinary led*1

*eeprom at24cxx *1

* Infrared receiver hs0038 *1

* Download circuit ch340e

* 3v3 ldo (me6211/ap2112k)

other

* The crystal oscillator is a 5032 11.0592MHz SMD crystal oscillator (this is used only when the 3215 crystal oscillator cannot afford to vibrate)

* Without automatic download circuit (because I have not successfully adjusted this automatic download circuit myself)

* If you want to teppanyaki (heating table welding), don’t use Huaqiu’s teppanyaki. Their teppanyaki plates will fade in color. It’s better to use our Jialichuang plates.

* I use a 4-layer board because it is easy to draw and it is free to print. Although you can’t choose the color on the fourth floor now, green is pretty nice too.

* If you want to use this board, do not place an order according to the BOM table. It is not accurate. You need to look at the components on the schematic diagram.

  The main resistors and capacitors used are 0402 10kΩ resistor, 0402 100nF capacitor, 1206 10kΩ resistor, 0603 led

* Uses P4 port, including interrupts

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Lithium battery powered:

Because the power supply range of STC89C52RC is 3.6~5.5v (lower voltage is also possible), it can be powered by lithium batteries, but the clock frequency will be reduced.