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Paluka, the Mischievous Cat NFC

Overview

Using a professional EDA design, removing the identification chip allows it to function as a wireless charger indicator card, NFC card reader status indicator, etc.
![20240223_230249_Burst01.jpg]

Usage effect, COB solution
![20240224_005449.jpg]

NT2H1311F0DTLH solution
![20240224_011328.jpg]

![20240224_011001.jpg]

20240223_224834.mp4

PDF_Paluka, Mischievous Cat NFC.zip

Altium_Paluka, Mischievous Cat NFC.zip

PADS_PALUKA, Mischievous Cat NFC.zip

BOM_Paluka, Mischievous Cat NFC.xlsx

95950

NE555 array dual-pulse generation module

4-string NE555 pulse generator

This is a 4-series NE555 pulse generator with adjustable pulse widths of 0.1-1ms and 1-10ms, suitable for spot welding machines. The key is triggered by a falling edge;
the first 555 has a 500ms delay, the second is a pre-welding pulse, the third is a delay pulse, and the fourth is the welding pulse. The outputs of the second and fourth 555s are connected to the pulse output via diodes.

PDF_NE555 Array Dual-Pulse Spot Welding Machine Pulse Generation Module.zip

Altium_NE555 array dual-pulse spot welding machine pulse generation module.zip

PADS_NE555 Array Dual-Pulse Spot Welding Machine Pulse Generation Module.zip

BOM_NE555 Array Dual-Pulse Spot Welding Machine Pulse Generation Module.xlsx

95951

RH6618A PWM Touch-Controlled Dimmable LED Light

A 20-lamp single-channel touch-controlled PWM dimming lamp using the Ronghe RH6618 as the main control chip.

First, it was all theoretical. I spent a long time searching for a good controller, finally choosing the RH6618. This solution can be bought on Taobao for around one yuan. Its PWM frequency is over 24kHz, significantly higher than the 4kHz of solutions like the JL8022W (I heard, it wasn't mentioned in the datasheet), and also several times more expensive QAQ. Hopefully, 24kHz will be easier on the eyes than 4kHz.

Since the LED is intended to provide supplemental lighting for the camera during soldering, I just chose a random LED, which looks passable. At maximum brightness, before heating up, the power consumption is just over 2W; it will increase slightly as the temperature rises. The aluminum substrate heats up well; in an indoor temperature of 20 degrees Celsius, the board feels warm to the touch.

tmp.mp4

PDF_RH6618A PWM Touch-Controlled Dimmable LED Lamp.zip

Altium_RH6618A PWM Touch-Controlled Dimmable LED Lamp.zip

PADS_RH6618A PWM Touch-Controlled Dimmable LED Lamp.zip

BOM_RH6618A PWM Touch-Controlled Dimmable LED Lamp.xlsx

95952

USB to Serial Port - CH340 Serial Port Programmer

USB to serial adapter, and automatic programming circuitry for ESP8266 and ESP32 low-end systems.

PDF_USB to Serial Port - CH340 Serial Port Programmer.zip

Altium_USB to Serial Port - CH340 Serial Programmer.zip

PADS_USB to Serial Port - CH340 Serial Port Programmer.zip

BOM_USB to Serial Port - CH340 Serial Port Programmer.xlsx

95953

electronic

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2026-03-28 09:10:59

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