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

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

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

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