![Adam Mulligan-Wilson on Twitter: "The PSU in my Performa 6400 has died - the PWM controller at IC1 (TOP200YAI) has failed short. I know some basics about SMPS design and operation, but Adam Mulligan-Wilson on Twitter: "The PSU in my Performa 6400 has died - the PWM controller at IC1 (TOP200YAI) has failed short. I know some basics about SMPS design and operation, but](https://pbs.twimg.com/media/Fr-ExhiWYAAUoso.jpg)
Adam Mulligan-Wilson on Twitter: "The PSU in my Performa 6400 has died - the PWM controller at IC1 (TOP200YAI) has failed short. I know some basics about SMPS design and operation, but
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Hc-sr04p Ultrasonic Ranging Module Distance Sensor Module 3-5.5v Voltage - Integrated Circuits - AliExpress
![Adam Mulligan-Wilson on Twitter: "The PSU in my Performa 6400 has died - the PWM controller at IC1 (TOP200YAI) has failed short. I know some basics about SMPS design and operation, but Adam Mulligan-Wilson on Twitter: "The PSU in my Performa 6400 has died - the PWM controller at IC1 (TOP200YAI) has failed short. I know some basics about SMPS design and operation, but](https://pbs.twimg.com/media/Fr-ExhlWwAAgrQZ.jpg)