DavidJRichards / Avation-Smiths-HSI

Horizontal Situation Indicator type HSI_WL332

Avation-Smiths-HSI

Horizontal Situation Indicator type HSI_WL332

connections

see https://github.com/DavidJRichards/Aviation_Instruments/blob/main/HSI_WL332.md

components

• raspberry pi 2040
• PCA9685 i2c pwm controller for driving galvos, flags, solenoids
• max3232 Arinc transmitter
• TFT eSPI display showing system status
• Rotary encoder for menu / change settings
• 400 Hz PWM generation for synchro transmitter
• two audio amplifiers for driving synchro
• three channel 400 Hz ADC reading heading control
• 400Hz synchronisation input for servo reference
• 400Hz reference frequency measurements

Raspberry pi 2040 exercise firmware

rp2040 sketch

photos