BBDuino (Black Body Duino)

This repository contains .ino files and documentation for the simple BB PWM controller based on ATMega328P.

Typical use case of BBDuino is supplying a PWM signal at 5V or another voltage(via MOSFET) and 16-bit resolution to a resistor thermally linked to black body 'equivalent' material somewhere in a cryostat. This heating varies the amount of photons incident on sample/detector, allowing extraction of important performance metrics. Basically...science!

Firmware communicates via somewhat reliable serial (i.e. has ACKs) communication protocol. Protocol specification and tests are provided in HCLib, a part of ADRNX cryostat automation framework (with which BBDuino is typically controlled in our setup).

Basic circuit (only power elements are shown, no status LEDs)

Flashing clean boards:

• Install latest arduino IDE
• Flash serial setting firmware (fw_typeandserial.ino) - this will write specified serial number and type to EEPROM as safeguard against running wrong FW type
• Flash actual firmware of correct version (fw_v[xx].ino)

Updating

• Check board output on startup to see current type, and flash appropriate FW version