Looking for a simple circuit to control the light intensity of Light Emitting Diodes (LEDs) or similar lighting sources? Here is an Arduino based circuit with three independent pulse width modulated ...

The PWM sketch works to vary the output linearly, however, the light outputted by the LED does not change in a linear manner. When applying the scientific metric of ‘perceived brightness versus time’ ...

Posted in Arduino Hacks, LED Hacks Tagged pwm, shift register ← Understanding Interrupts In PIC Microcontrollers Locking Notebook Enclosure → ...

–PWM会受到开关2.5ms典型上升时间的一定限制。 (原文刊登于EDN美国版，参考链接： DIY LED display provides extra functions and PWM，由Ricardo Xie编译) ...

PWM 驱动芯片，其 PWM 计数器的计数速率最多可达 25MHz，其影像刷新率的最大值也只能达到 360Hz；即使将计数速率提高为 30MHz，影像刷新率亦至多只能提升至 420Hz。 可以看出，采用传统的PWM驱动芯片，LED屏幕显示的刷新率效果十分有限。 （传统PWM驱动 显示效果） ...

· 安装孔尺寸：内径3.1mm/外径6mm 要驱动该点阵屏有2种方式，一种是以常规的Arduino开发板来驱动，另一种则是以ESP32-E Arduino开发板来驱动。 对于常规的Arduino开发板驱动，在使用前安装对应的FireBeetleLEDMatrix-master库，安装后即可见到对应库以供使用。

Posted in Arduino Hacks, LED Hacks Tagged 595, pwm, shift register ← Hackaday In The Social Tangle Roomba Used To Map Indoor Air Quality → ...

PWM 调光不像模拟调光那样线性。当 PWM 控制输入变低时，输出电压不会立即关闭，因为输出电容需要通过 LED 负载放电。当 PWM 输入变高时，稳压器对 ...

Universal (ish) Arduino grbl opto-coupler interface also works with logic-level pwm In adding an alternative cutter drive motor (‘spindle’) to an existing cnc machine, an electrically isolated pwm to ...

Freescale Semiconductor has introduced the MC34845 LED driver with high-speed pulse width modulation (PWM) capability. This six-channel device is designed to allow LED backlights to operate at ...