Manuel Caldeira
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Description
Digital Switched Attenuator - Relay Board
I designed and built a 50Ω digitally controlled stepped attenuator for RF work, offering 3dB steps up to 93dB of attenuation. The system uses relays controlled by an Arduino Nano, a rotary encoder, and an OLED display. This is one of two boards used; the second can be ordered via the link below. Watch the project video here: [Insert link].
https://www.pcbway.com/project/shareproject/Digital_Switched_Attenuator_Control_Board_4181cead.html
Schematic and Layout
Dec 13,2024
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Digital Switched Attenuator - Relay Board
2 Layers PCB 45.7 x 99.1 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen
A relay board to build a digitally controlled switched attenuator, 50Ω, allowing for attenuations in 3dB steps up to 93dB.
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Published: Dec 13,2024
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