➀ Control boards for high-speed hair dryers were purchased for $0.99 each, suspected to be damaged. ➁ Thyristors used include JST138C-600E by Jiejie Micro and BTB16-800CW by Weida. ➂ Rectifier bridges used are KBP310, primarily from Weiwang and Jingdao Microelectronics. ➃ Thyristor output optocouplers are the same model JOC3053 from Jiejie Micro. ➄ MOS transistors vary, with models from Huarun Micro and Longteng. ➅ MCUs used include CMS32M5710 by Zhongwei Semiconductor and an unidentified model. ➆ Pre-drivers differ, with models from Yuli Semiconductor, Xita Technology, and Zhongwei Semiconductor. ➇ DC-DC converters used include PN8054E and LKS620 by Lingou Creation. ➈ Electrolytic capacitors on one board were found to be 200V rated, leading to explosions.