ing DIY

This is a portable LED controller based on the ESP32 SoC. It is powered by 18650 lithium-polymer batteries and it is designed to synchronize LED patterns with music. To achieve this, I developed an analog circuit with a high SPL microphone connected to a PCM1808 DAC via a low-pass filter preamplifier. The input signal to read more…

This is a 5x5x5 LED cube based on the Cortex-M0+ SoC ATSAML21E16B. The 125 RGB LEDs are multiplexed and controlled by 5 shift registers of 16 bits each, which also control the LEDs Anode. The CPU is running FreeRTOS, which manage the reading of the LEDs animations from a uSD card and the LEDs multiplexing. read more…

This is a demo board I created to test the I2S PCM1808 DAC. An XTAL oscillator based on SN74LVC1GX04 generates the DAC SCKI clock signal, and a very low-power DC-DC boost converter is responsible for powering the analog circuitry. The signal from a microphone is amplified and filtered before entering the DAC. Test with Raspberry read more…

These are a series of very simple PCBs developed for LED lighting. They are employed to connect two strips of Pixel LED placed at a considerable distance, ensuring that the digital control signal for the pixels does not degrade. WS281x 485 This is a versatile and cofigurable RS485 TX-RX transceiver for long range serial LED strip read more…

This clock is based on the ATSAML21E16B, a Cortex-M0+ microcontroller. The LTC4080DC-DC converter handles both charging the battery and powering the CPU, both during the charging phase and regular operation. The CPU controls a 6×3 matrix of LEDs in multiplex and a buzzer through PWM. The idea behind designing this circuit arises from the desire read more…

This is a compact single-sided circuit based on a small 8-bit microcontroller (PIC16F18313) that controls a LED2001, a buck LED controller with current feedback. It enables powering a high-power LED with up to 10W. First prototype Firstly, I created a functional prototype by producing the PCB in my laboratory using the “press ‘n’ peel” technology. read more…

This is a Nixie tube clock that combines the charm of vintage technology used until the 1940s with modern circuit solutions based on a microcontroller. The heart of this system is an ATXMEGA128A3U microcontroller running a state machine firmware. The CPU controls the Nixie tubes brightness through high-voltage shift registers connected on the SPI bus. read more…