signal generator

PDF_SignalGenerator.zip

Altium_signal_generator.zip

PADS_SignalGenerator.zip

BOM_SignalGenerator.xlsx

95246

Laptop WWAN to USB

The laptop has a built-in 4G/5G network card to USB adapter for use as a built-in mouse receiver.

Function Description:
This laptop has a built-in 4G/5G network card to USB adapter for use with a built-in mouse receiver.
Precautions:
1. Pay attention to the soldering height of the USB female connector to avoid interference with the motherboard.
2. It uses 3.3V power supply; some receivers may not work properly. Testing showed that the Logitech Unifying receiver works normally with 3.3V, but the Bolt receiver is not recognized with 3.3V.
3. Some motherboards have unsoldered components, resulting in no 3.3V voltage output; jumper wires are required for power supply. Testing showed that the Fujitsu U939 works directly, but the Hasee K670DG4D1 has no power supply.
0.8mm
thick immersion gold plate, hand-polished and chamfered.
Revision Notes:
None.
Attachments:
A simple casing was made for easy fixation. Acknowledgements:
The
design process referenced the schematic diagram of the LTE peripherals in the Hasee K670DG4D1 (Blue Sky W650KKKJ1).

NGFF_Shell.stl

Gerber_NGFF_BK_2_USB.zip

PDF_Laptop WWAN to USB Adapter.zip

Altium_Laptop WWAN to USB Adapter.zip

PADS_Laptop WWAN to USB Adapter.zip

BOM_Laptop WWAN to USB Adapter.xlsx

95247

Bluetooth steering wheel hub: TiHUBv2

Bluetooth steering wheel hub

Features I hope everyone can improve:

Add dual-sided LEDs to each dual-sided button, single color is fine, dim, possibly driven by a MOSFET from the battery.
Add a side rotary encoder near the thumb.
Replace the encoder on the lower right side with a rotary band switch for switching modes (may need to increase the number of channels through different resistance values ​​or shift registers).
Change one of the buttons to a seven-way joystick.
Add a battery level display (detecting the current reserved space for surface-mount resistors), which can be used in conjunction with the first LED flashing to remind the user.
I welcome suggestions for other new features to improve the user experience.

If these features are usable, I will merge them into the main branch. Let's work together to promote the progress of the open-source community and the simulator. Thank you!
 
 
Manual: TiHubV2 User Manual + BOM (qq.com)
Introduction Video:
TiHub v2 Bluetooth Wireless HUB_Bilibili_bilibili
 
Donations welcome:
The main features of the new steering wheel hub :
 
First, in terms of design, it has changed from one large board to two small boards connected in opposite directions, and the size of the boards has been just reduced to 10x10 cm, making it easier to prototype with JLCPCB.
Secondly, the main controller has been changed from ESP32 to NRF52840, which significantly reduces power consumption and greatly enhances battery life, turning the previous two or three days of battery life into almost unlimited battery life.
Thirdly, the previous mechanical keyboard switches have been replaced with simple 12x12 buttons with button caps, which feel quite good and look very professional after applying stickers.
Fourthly, the shift paddles that previously required wire connections have been replaced with onboard connections, making the assembly process much easier.
 
Currently, the cost of this set is very low, and since it uses pre-built modules, everyone can solder them themselves. Like the previous version, all the code and 3D models will be open source. Friends who are interested can make one and try it out, or I will also release the pre-built kit later.
 

PDF_Bluetooth Steering Wheel Hub: TiHUBv2.zip

Altium Bluetooth Steering Wheel Hub: TiHUBv2.zip

PADS Bluetooth Steering Wheel Hub: TiHUBv2.zip

BOM_Bluetooth Steering Wheel Hub: TiHUBv2.xlsx

95248

Mini Easy Digital Oscilloscope

A simple digital oscilloscope based on the GD32E230C8T6, with a small size.

I. Introduction
 • A simple digital oscilloscope based on GD32E230C8T6. Dimensions: 7.5*4.5*1.4cm (height is estimated, excluding the rotary encoder).
 The schematic is mainly based on the training camp, with the screen design referenced from a Taobao seller (HeZhou also has schematics).
 The shape is inspired by @qaxslk's sandwich structure (not yet board-made)
 . The firmware currently uses @eos911's large-screen firmware (until the Clion environment is set up)
 . Compared to the training camp version, all components have been swapped for surface-mount packages, buttons have been changed to side buttons, PWM is led out via copper pillars, GD32 chips are used directly, the screen uses a wire-bonded design, the BNC interface has been changed to an MMCX interface, and some resistor values ​​have been modified (see details below) .
 Ideal cost: Rotary encoder 1.68, MMCX 2, 1.8 TFT screen 6.6, TLP72I 0.22, LM393 0.18, XL7660 0.6, GD32E230C8T6 1.05, crystal oscillator 0.44, AMS1117-3.3 0.2, others are negligible (actual cost is higher)
 . And it's a pity I missed the event... II. Specific modifications
to the simulated front-end processing circuit are shown in the figure. Only calculations were performed, not simulations. III. Issues  : • The rotary encoder's rotation direction is reversed. It seems easier to modify the firmware or the wiring later.  • KEY1 and KEY2 are reversed (I didn't even notice the reversed order while routing the wiring...).  • The screen driver seems incompatible, shifting slightly to the upper left.  • Direct copper connection to the GND pads causes too much heat dissipation, hindering desoldering.  • It seems better to leave the two corners of the 3.3V power supply section on the screen pads unconnected.

Oscilloscope v1.0 Verification.mp4

PDF_mini Simple Digital Oscilloscope.zip

Altium_mini Simple Digital Oscilloscope.zip

PADS_mini Simple Digital Oscilloscope.zip

BOM_mini Simple Digital Oscilloscope.xlsx

95253

TP4333 power bank

Power bank based on TP4333

The PCB board is designed based on the 18650 battery box from Taobao. It can be directly glued on with hot glue. The input and output are 1A, which is only for emergency use. I didn't add the button lights on the board; you can adjust them yourself.

PDF_TP4333 Power Bank.zip

Altium_TP4333 power bank.zip

PADS_TP4333 power bank.zip

BOM_TP4333 Power Bank.xlsx

95254

Industrial vacuum cleaner main control

Control of industrial vacuum cleaners

The design of a vacuum cleaner control system is a complex and precise engineering project, integrating multiple key modules and technologies to ensure system stability and reliability while achieving vacuum cleaner control functions. The core components of this system include a control module, solenoid valve control, comparators, optocoupler SCR drivers, optocoupler zero-crossing detection, and AC current rectification, each playing a crucial role.
First, let's look at the control module. This module is the brain of the entire system, responsible for coordinating and controlling the operation of various components. It controls the system through two input paths. The first path involves AC power being stepped down by a transformer, then rectified to output a stable 12V DC voltage, which is then output as 5V DC via an LDO to supply the microcontroller, comparator, and optocoupler. The second path involves AC power being output as DC via a current transformer and rectifier bridge, compared by a comparator, and outputting high/low level signals based on the relationship between the input voltage and the reference voltage. These signals are then input to the microcontroller for processing.
The microcontroller plays a critical role in this system, with two I/O ports for selecting automatic and manual modes. Switching between modes is achieved by connecting a single-pole double-throw switch to ground. In automatic mode, when the microcontroller receives a high-level signal from the comparator, it outputs a low-level signal to control the optocoupler, causing the motor to start working. If the microcontroller does not receive a signal from the comparator, it will detect a signal through a sensor, and the connected diode will also conduct, triggering the optocoupler and motor to work.
Regarding the adjustment of the motor speed and the solenoid valve's vibration frequency, the system utilizes the voltage divider principle of two resistors; the microcontroller can switch and adjust based on the voltage signal received from the I/O port. This achieves precise control of the vacuum cleaner's operating state, thereby improving its performance and efficiency.
In addition to the above functions, the system also includes an optocoupler connection to the solenoid valve for control. By controlling the optocoupler's conduction, the solenoid valve's operating state can be precisely controlled, enabling comprehensive control and management of all components of the vacuum cleaner.
The design of the vacuum cleaner control system not only involves various advanced technologies and modules but also requires careful design and debugging of the collaborative relationships between various components to ensure the system's stability, reliability, and efficiency. This complexity and precision in system design provides a solid foundation for improving vacuum cleaner performance and lays an important foundation for the future development of vacuum cleaner control technology.

PDF_Industrial Vacuum Cleaner Main Control Unit.zip

Altium_Industrial Vacuum Cleaner Main Controller.zip

PADS_Industrial Vacuum Cleaner Main Controller.zip

BOM_Industrial Vacuum Cleaner Main Control File.xlsx

95255

ESP8285 development board Type-C automatic download of version 340c

The ESP8285 module development board features an onboard 340 serial port for downloading and supports both Android and Type-C interfaces.

The buttons are a bit big. Oh well, I accidentally added an extra zero to the buttons last time I bought them. I'll just use them gradually. They're all
the two common types of resistors: one 10k and one 4.7k. Of course, you could use all 10k resistors.
I don't have that many components on hand, so I'll just make do with what I have.
The board design isn't very good, so I'm just showing it off.