OLIA: An open-source digital lock-in amplifier

Frontiers in Sensors

Sensors

John C. de Mello¹  Andrew J. Harvie² 

[1]Department of Chemistry, Norwegian University of Science and Technology (NTNU), Trondheim, Norway

[2]Department of Chemistry, Norwegian University of Science and Technology (NTNU), Trondheim, Norway

[3]School of Chemical and Process Engineering, University of Leeds, Leeds, United Kingdom

关键词: open hardware;    lock-in amplification;    signal detection;    optical sensing;    digital signal processing (DSP);    electronics;   

DOI  :  10.3389/fsens.2023.1102176

 received in 2022-11-18, accepted in 2023-03-16,  发布年份 2023

来源: Frontiers

【 摘 要 】

The Open Lock-In Amplifier (OLIA) is a microcontroller-based digital lock-in amplifier built from a small number of inexpensive and easily sourced electronic components. Despite its small credit card-sized form-factor and low build-cost of around US$35, OLIA is a capable instrument that offers many features associated with far costlier commercial devices. Key features include dual-phase lock-in detection at multiple harmonic frequencies up to 50 kHz, internal and external reference modes, adjustable levels of input gain, a choice between low-pass filtering and synchronous filtering, noise estimation, and a comprehensive programming interface for remote software control. OLIA comes with an optional optical breakout board that allows noise-tolerant optical detection down to the 40-pW level. OLIA and its breakout board are released here as open hardware, with technical diagrams, full parts-lists, and source-code for the firmware.

【 授权许可】

Unknown   
Copyright © 2023 Harvie and de Mello.