--- title: "#open-hardware articles | Hashnode" description: "Explore the latest #open-hardware articles, tutorials, and guides on Hashnode." url: "https://hashnode.com/tag/open-hardware" --- Tag # #open-hardware 0 posts · 0 followers [circuitrocks](https://hashnode.com/@circuitrocks) · [Oct 20](https://hashnode.com/posts/olimex-level-shifters-fix-33v-to-5v-breadboard-headaches/6ad6e9bc69f92038c5db516a) ### [Olimex Level Shifters Fix 3.3V to 5V Breadboard Headaches](https://circuitrocks.hashnode.dev/olimex-level-shifters-fix-33v-to-5v-breadboard-headaches?utm_source=hashnode&utm_medium=feed) Olimex Level Shifters Fix: Olimex's two new open hardware level shifters translate 1.65 V to 5.5 V on I2C, SPI and UART. 2 min read · [circuitrocks.hashnode.dev](https://circuitrocks.hashnode.dev/olimex-level-shifters-fix-33v-to-5v-breadboard-headaches?utm_source=hashnode&utm_medium=feed) [circuitrocks](https://hashnode.com/@circuitrocks) · [Oct 4](https://hashnode.com/posts/spidriver-quattro-a-usb-spi-debugger-with-a-built-in-screen/6ac1d2833a3a04ba0ad45123) ### [SPIDriver Quattro: A USB SPI Debugger With a Built-In Screen](https://circuitrocks.hashnode.dev/spidriver-quattro-a-usb-spi-debugger-with-a-built-in-screen?utm_source=hashnode&utm_medium=feed) SPIDriver Quattro USB SPI: Debugging SPI blind is painful. The SPIDriver Quattro adds a live display, 0.1 mA current sensing, and quad-SPI support so you… 3 min read · [circuitrocks.hashnode.dev](https://circuitrocks.hashnode.dev/spidriver-quattro-a-usb-spi-debugger-with-a-built-in-screen?utm_source=hashnode&utm_medium=feed) [circuitrocks](https://hashnode.com/@circuitrocks) · [Oct 3](https://hashnode.com/posts/localdot-give-an-echo-dot-a-local-home-assistant-brain/6ac17e383c5815ef85371bd4) ### [LocalDot: Give an Echo Dot a Local Home Assistant Brain](https://circuitrocks.hashnode.dev/localdot-give-an-echo-dot-a-local-home-assistant-brain?utm_source=hashnode&utm_medium=feed) LocalDot Give Echo Dot: AAElectronics' LocalDot swaps an Echo Dot's mainboard for an ESP32-P4 and ESP32-S3 that talk only to Home Assistant. 2 min read · [circuitrocks.hashnode.dev](https://circuitrocks.hashnode.dev/localdot-give-an-echo-dot-a-local-home-assistant-brain?utm_source=hashnode&utm_medium=feed) [circuitrocks](https://hashnode.com/@circuitrocks) · [Sep 2](https://hashnode.com/posts/tiwaz-an-stm32-split-keyboard-that-is-also-two-macro-pads/6a97e744d725efe9668f7b1b) ### [Tiwaz: An STM32 Split Keyboard That Is Also Two Macro Pads](https://circuitrocks.hashnode.dev/tiwaz-an-stm32-split-keyboard-that-is-also-two-macro-pads?utm_source=hashnode&utm_medium=feed) Tiwaz STM32 Split Keyboard: Timo Strube's Tiwaz splits into two standalone macro pads with joysticks, runs QMK on an STM32F401, and ships every hardware… 3 min read · [circuitrocks.hashnode.dev](https://circuitrocks.hashnode.dev/tiwaz-an-stm32-split-keyboard-that-is-also-two-macro-pads?utm_source=hashnode&utm_medium=feed) [circuitrocks](https://hashnode.com/@circuitrocks) · [Jul 25](https://hashnode.com/posts/nordic-nrf54l15-discovery-two-open-hardware-boards-one-pcb/6a6533b7ac15c76a011debcf) ### [Nordic nRF54L15 Discovery: Two Open-Hardware Boards, One PCB](https://circuitrocks.hashnode.dev/nordic-nrf54l15-discovery-two-open-hardware-boards-one-pcb?utm_source=hashnode&utm_medium=feed) Nordic nRF54L15 Discovery Two: Icy Electronics' nRF54L15 Discovery packs a Cortex-M33, a RISC-V coprocessor, and a snap-off CMSIS-DAP debugger onto one… 2 min read · [circuitrocks.hashnode.dev](https://circuitrocks.hashnode.dev/nordic-nrf54l15-discovery-two-open-hardware-boards-one-pcb?utm_source=hashnode&utm_medium=feed)