RFQ/BOM 0 登入 / 注册

选择您的位置

用户形象

51 single-chip production running water lamp does not light up.

Hardware design
三月 05, 2021 by Lina 2406

Novice to MCU. I use stc89c52 single-chip microcomputer to make running water lamps, which can be used on the Huijing HL-1 development board. But none of the lights on the circuit I soldered was on. I use 8 LED lights to connect the positive pole to vcc, and the negative pole to p1.0 to p1.7. The crystal oscillator circuit is soldered. I beg the boss to tell me the reason. I have been worried for several days. Attach the running water light program.

mmexport1524154819333.jpg

mmexport1524154823426.jpg

所有评论

user image

Rolando 发表于 March 5, 2021

Looked, the code is ok, it should be a hardware failure.

0
user image

Dale 发表于 March 5, 2021

1. Whether the positive and negative poles of the LED are connected reversely, and whether the LED is damaged;

Second, is there a current-limiting resistor connected to the LED, if not, it is easy to burn the MCU pins;

3. Is the reset circuit soldered?

0
user image

Lennox 发表于 March 5, 2021

The program is correct, an obvious hardware error.

0
user image

Winston 发表于 March 5, 2021

A typical hardware error is that the host reverses the polarity of the diode, and the other is that no resistor is added.

0

写一个答案

您需要登录才能回复。 登入 | 注册