attenuator

This project is about creation of affordable and easy-to-manufacture prototypes of PCBs which are used to expand the capabilities of existing low-cost SDR receivers based on RTL2832U chip.

A 5.1-channel, analog audio processor based on PT2322 and Arduino Nano

A Breadboard for the PE4312

Set of MATLAB scripts to manage an optical recirculating loop

Python library to control Flann's programmable instruments

A simple resistive divider network to dampen the output of an audio amplifier 16db.

Resistive RF Attenuator pad calculator

Python routines for submm instrumentation astronomy at the University of Colorado Boulder

USB-controlled 6-bit digital RF attenuator (DC-6 GHz) based on HMC624A and STM32F4 (PCB Design + HAL Code for STM32)

Controller for audio power amplifier. Features: power control with soft start, SPI multi channel volume control.

erfx5361 website

Nine Fives — independent third-party profile of a public API surface, by API Evangelist. Nine Fives builds modern, simple-to-use RF (radio frequency) test equipment for next-generation spacecraft, drones, and cellphones. Founded in 2025 by Andrew Kurtz and Noah Levy — RF hardware engineers who spent a decade at SpaceX designing radios and test syst