https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL19806_%E2%80%93_Pico-8SEG-LED%2FenWSAL19806 – Pico-8SEG-LED/en - Versionsgeschichte2026-10-23T23:09:39ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL19806_%E2%80%93_Pico-8SEG-LED/en&diff=1752&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:36:07Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
<p><b>Neue Seite</b></p><div>__NOINDEX__<br />
'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
The module provides a red, 0.4-inch, 4-digit 8-segment display with SPI-compatible driving via a 74HC595 shift register. It plugs directly onto the standard pin header of the Pico and requires a 5 V supply.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL19806 WSAL19806 – 4-digit 8-segment Display Module for Raspberry Pi Pico, SPI-compatible]<br />
<br />
== Technical overview ==<br />
* Supply voltage: 5 V; operating current approx. 30 mA.<br />
* Display: 4 digits, red LEDs, negative circuit type, display part FJ4401AH.<br />
* Dimensions: 21(H) x 52.00(V) mm.<br />
* Wiring to the Pico: VCC to VSYS, GND to GND, DIN to GP11, CLK to GP10, RCLK to GP9.<br />
* The 74HC595 driver is an 8-bit shift register with parallel output latch; it needs separate clocks for shifting and latching.<br />
* For C development: build the project in the c/ folder (cmake + make), generate main.uf2 and copy it to the RPI-RP2 drive in BOOTSEL mode.<br />
* For MicroPython: use the Thonny IDE, flash firmware rp2-pico-20210418-v1.15.uf2, then run the sample file from the python/ folder.<br />
* DEV_Config.c provides GPIO and SPI helpers: DEV_Digital_Write/Read and DEV_SPI_WriteByte.<br />
<br />
'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo apt-get install p7zip-full<br />
cd ~<br />
sudo wget https://files.waveshare.com/upload/9/94/Pico-8SEG-LED-Code.7z<br />
7z x Pico-8SEG-LED-Code.7z -o./Pico-8SEG-LED-Code<br />
cd ~/Pico-8SEG-LED-Code/c/build/<br />
export PICO_SDK_PATH=../../pico-sdk<br />
cmake ..<br />
make -j9<br />
sudo apt upgrade thonny<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* The exact pin assignments (GP9/GP10/GP11) are version-dependent on the Pico driver used and must be verified before soldering or wiring.<br />
* Firmware files such as rp2-pico-20210418-v1.15.uf2 or pico_micropython_20210121.uf2 must be available; flashing certain MicroPython firmwares on Pico2 can cause recognition issues.<br />
* Using Thonny requires an up-to-date version, since older versions lack Pico support.<br />
* On the first-time Arduino upload, the correct COM port must be selected; choosing the wrong port leads to errors.<br />
* The source contains outdated links and path names; all paths and URLs should be validated for validity before use.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Pico-8SEG-LED Pico-8SEG-LED - Waveshare Wiki]<br />
* Source revision: 74174<br />
* Captured: 2026-09-02T02:55:38+00:00<br />
* SHA-256: <code>dc4fca73f686c03f7c0dc843e8e050e8f93b79a32940547df76954275e6a016d</code></div>JWTechPublisher