Warning: The BOM is automatically generated and may not match the actual situation. Please do not use the BOM table to place orders directly. Everything is subject to the PCB package and schematic values.
The LED four-digit ASCII character display component introduced by HP in the last century. Due to its simplicity and ease of use and excellent display effect, it has now become a good choice for electronic DIY and nostalgia.
4-link HPDL-1414 display module. The module itself only has pins out to minimize size and complexity, so that it can be easily welded or plugged into your final product or solution verification version.
Circuit board copper foil layer: 4; recommended board thickness: 1.6mm
| name | Function | describe |
|---|---|---|
| VCC | Power | +5V voltage input serves as module power supply. |
| GND | Ground | Ground. |
| NC | Not Connect | Leave floating or ground, this pin is not connected to internal lines. |
| A00-A01 | Input | Display location selection. Corresponds to the A0 - A1 pins of HPDL-1414. |
| D00-D06 | Input | Show data entry. Corresponds to the D0 - D6 pins of HPDL-1414. |
| W00-W03 | Input | Display component selection. Correspond to the WR pins of HPDL-1414 from left to right. |
The supporting verification board uses ATMEGA-328P-PU microcontroller, comes with USB download (you need to burn the Bootloader by yourself), and leads to the I2C interface and 5 GPIOs with ADC, making it rich in scalability. When the verification board is used as an I2C host, it can be connected to various external sensors or RTCs. At this time, the verification board can become a simple and non-redundant clock, thermometer and other desktop ornaments; when the verification board is used as an I2C slave, it can appear as a Common and easy-to-use I2C display to integrate into your other projects (the above functions require self-programming).
New version description: Reproduce the reset circuit and lead out 5 unused GPIOs with ADC (including IIC interface pins).
Circuit board copper foil layer: 2; recommended board thickness: 2.0mm
Please note: The demonstration in the picture uses an outdated version of the PCB. Please refer to the latest design.
This library is designed for a single HPDL-1414 component, but is also suitable for operation with multiple HPDL-1414s. This library is developed with the object-oriented concept in mind and encapsulates common operations so that users can complete development without caring about any details.
Regarding usage instructions: See the NDoc comments in HPDL1414.h for details. Visual Stdio users can check the descriptions of each constant and method directly in the IDE.
This routine is developed using the Arduino environment and uses the Iris.HPDL1414 library. The content is to scroll the first natural segment of "Alice in Wonderland" and is adapted to the supporting verification board. The program is concise and clear, with detailed annotations, making it very suitable for secondary development.
Include:
Code files (HPDL1414 Display Module.ino, HPDL1414.cpp, HPDL1414.h)
Rendering (Rendering.jpg)
Component Data Sheet (HPDL-1414 DataSheet.pdf, the copyright of this file belongs to the original author)
All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.
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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