Here is my project to build a HiFi preamplifier. This includes schematics, PCB layouts, CircuitPython code (on GitHub), BoMs, measurements and photos.
- High performance design with measurements
- Quality components
- Completely digitally Controlled
- Modular design
- All open source
The preamplifier is made up of a number of connected components:
- MDAC attenuator (PCB, code): Controls the volume
- Input selector (PCB, code): Selects the input
- Encoder panel (PCB, code): Holds rotary encoder and LED indicator
- Power Supply 5V (PCB): Power supply for digital components.
- Power Supply +/- 15V (PCB): Power supply for MDAC attenuator op-amp
- Micro controller board (PCB): Holds the micro controller and other connectors
- RCA panel (PCB): For the RCA sockets and connectors
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — Challenges in trade between China and U.S. highlighted by forced labor bill
Wearables — There are some limits to conductive thread
Electronics — = != ==.
Python for Microcontrollers — Python on Microcontrollers Newsletter: Retrofitting old computers, Pinguin and much more! #CircuitPython @micropython @ThePSF @Raspberry_Pi
Adafruit IoT Monthly — CO2 Canary In a Coalmine, AQI Funnies, and more!
Microsoft MakeCode — MakeCode Thank You!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — NEW PRODUCT – Adafruit PCF8575 I2C 16 GPIO Expander Breakout – STEMMA QT / Qwiic
No comments yet.
Sorry, the comment form is closed at this time.