Cascade Kobayashi
@cascade.moe
🔧 Engineer Neko
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cascade.moe
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cascade.moe
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Cascade Kobayashi
@cascade.moe
· Oct 20
I think there is no need for a self introduction here... right?
If you are not familiar with name... Well, my nickname is 「七碳」 and I'm an engineer neko.
If you are not familiar with name... Well, my nickname is 「七碳」 and I'm an engineer neko.
Completed soldering of my CS4398-REV2 board, looks not bad after cleansing.
May 15, 2025 at 12:56 PM
Completed soldering of my CS4398-REV2 board, looks not bad after cleansing.
腦電感應是不是一種對大腦的、基於電磁輻射洩露的側信道攻擊？
Is brain sensing a type of side-channel attack on the brain, based on electromagnetic radiation?
Is brain sensing a type of side-channel attack on the brain, based on electromagnetic radiation?
May 7, 2025 at 8:02 AM
腦電感應是不是一種對大腦的、基於電磁輻射洩露的側信道攻擊？
Is brain sensing a type of side-channel attack on the brain, based on electromagnetic radiation?
Is brain sensing a type of side-channel attack on the brain, based on electromagnetic radiation?
Capacitive Touch Sensor, Rev.F
April 30, 2025 at 12:37 PM
Capacitive Touch Sensor, Rev.F
April 29, 2025 at 6:00 AM
some one screenshotted me when I was streaming
having difficulties with BGA packages.jpg
有人在我直播時截圖了
被 BGA 封裝為難.jpg
having difficulties with BGA packages.jpg
有人在我直播時截圖了
被 BGA 封裝為難.jpg
April 7, 2025 at 10:58 AM
some one screenshotted me when I was streaming
having difficulties with BGA packages.jpg
有人在我直播時截圖了
被 BGA 封裝為難.jpg
having difficulties with BGA packages.jpg
有人在我直播時截圖了
被 BGA 封裝為難.jpg
white pupils looks... mysterious, yet very adorable
April 5, 2025 at 4:17 PM
white pupils looks... mysterious, yet very adorable
Reposted by Cascade Kobayashi
WIP
Isn't it strange to use a STM32H7 + HS PHY, with a old DAC chip (CS4398) which is almost as old as me...?
But it's interesting that, CS4398 actually lived 20 years and it's still not discontinued.
Isn't it strange to use a STM32H7 + HS PHY, with a old DAC chip (CS4398) which is almost as old as me...?
But it's interesting that, CS4398 actually lived 20 years and it's still not discontinued.
April 3, 2025 at 6:54 AM
WIP
Isn't it strange to use a STM32H7 + HS PHY, with a old DAC chip (CS4398) which is almost as old as me...?
But it's interesting that, CS4398 actually lived 20 years and it's still not discontinued.
Isn't it strange to use a STM32H7 + HS PHY, with a old DAC chip (CS4398) which is almost as old as me...?
But it's interesting that, CS4398 actually lived 20 years and it's still not discontinued.
WIP
Price of STM32 microcontrollers are rising, the interface chip is twice more expensive than that DAC chip...
Maybe I will use CS43131 later, although it's not challenging as it integrated an HP-AMP which can simplify the design.
Price of STM32 microcontrollers are rising, the interface chip is twice more expensive than that DAC chip...
Maybe I will use CS43131 later, although it's not challenging as it integrated an HP-AMP which can simplify the design.
April 2, 2025 at 3:04 PM
WIP
Price of STM32 microcontrollers are rising, the interface chip is twice more expensive than that DAC chip...
Maybe I will use CS43131 later, although it's not challenging as it integrated an HP-AMP which can simplify the design.
Price of STM32 microcontrollers are rising, the interface chip is twice more expensive than that DAC chip...
Maybe I will use CS43131 later, although it's not challenging as it integrated an HP-AMP which can simplify the design.
3rd order low-pass filter. A simple RC filter followed by a Sallen-key filter. The latter filter is compensated to achieve flat group delay in pass band.
三階低通濾波器，一個簡單 RC 濾波器之後跟著一個 Sallen-key filter. 後者經過補償，可以在通帶中實現平緩的群延遲。
三階低通濾波器，一個簡單 RC 濾波器之後跟著一個 Sallen-key filter. 後者經過補償，可以在通帶中實現平緩的群延遲。
March 31, 2025 at 11:35 AM
3rd order low-pass filter. A simple RC filter followed by a Sallen-key filter. The latter filter is compensated to achieve flat group delay in pass band.
三階低通濾波器，一個簡單 RC 濾波器之後跟著一個 Sallen-key filter. 後者經過補償，可以在通帶中實現平緩的群延遲。
三階低通濾波器，一個簡單 RC 濾波器之後跟著一個 Sallen-key filter. 後者經過補償，可以在通帶中實現平緩的群延遲。
DAWN PRO
They may have better performance, but I can hardly identify the difference between playback devices with my ears.
Test result is slightly better than on board audio, but I suppose the result is limited by the recording device & testing environment, which are quite bad.
They may have better performance, but I can hardly identify the difference between playback devices with my ears.
Test result is slightly better than on board audio, but I suppose the result is limited by the recording device & testing environment, which are quite bad.
March 29, 2025 at 6:27 PM
DAWN PRO
They may have better performance, but I can hardly identify the difference between playback devices with my ears.
Test result is slightly better than on board audio, but I suppose the result is limited by the recording device & testing environment, which are quite bad.
They may have better performance, but I can hardly identify the difference between playback devices with my ears.
Test result is slightly better than on board audio, but I suppose the result is limited by the recording device & testing environment, which are quite bad.
Tested my CS4398 DAC (Rev 1), its performace isn't as worse as I expected... Although THD+N is really bad (0.02% @ -5dB, 0.01% or 0.008% @ -10dB)
March 29, 2025 at 7:44 AM
Tested my CS4398 DAC (Rev 1), its performace isn't as worse as I expected... Although THD+N is really bad (0.02% @ -5dB, 0.01% or 0.008% @ -10dB)
Reposted by Cascade Kobayashi
From the experience on last CS4398 DAC project, I decided to make a new CS4398, with STM32H7 as interface and some second hand OP1612 apmlifiers.
H750 is quite cheap now. It's very fast, plus bunches of peripherals that I may or may not use.
H750 is quite cheap now. It's very fast, plus bunches of peripherals that I may or may not use.
March 27, 2025 at 7:53 AM
From the experience on last CS4398 DAC project, I decided to make a new CS4398, with STM32H7 as interface and some second hand OP1612 apmlifiers.
H750 is quite cheap now. It's very fast, plus bunches of peripherals that I may or may not use.
H750 is quite cheap now. It's very fast, plus bunches of peripherals that I may or may not use.
Reposted by Cascade Kobayashi
沒活了，找點東西臨摹。這次是小塗真紀。
是聽講座的時候開始摸的，不過沒有怎麼優化線條，所以大概顯得很亂。
原作 Pixiv ID: 126483504
是聽講座的時候開始摸的，不過沒有怎麼優化線條，所以大概顯得很亂。
原作 Pixiv ID: 126483504
March 20, 2025 at 1:51 AM
沒活了，找點東西臨摹。這次是小塗真紀。
是聽講座的時候開始摸的，不過沒有怎麼優化線條，所以大概顯得很亂。
原作 Pixiv ID: 126483504
是聽講座的時候開始摸的，不過沒有怎麼優化線條，所以大概顯得很亂。
原作 Pixiv ID: 126483504
親友們說想看我 cos M200。
沒玩過 Girls' Frontline，但大概還是略有了解。
只是感覺自己的外貌過不了自己這一關呢。
My friends wanted to see me cosplay M200.
Although I never played Girls' Frontline, I know some of it.
I just don't think I'll look good enough to satisfy myself.
沒玩過 Girls' Frontline，但大概還是略有了解。
只是感覺自己的外貌過不了自己這一關呢。
My friends wanted to see me cosplay M200.
Although I never played Girls' Frontline, I know some of it.
I just don't think I'll look good enough to satisfy myself.
March 18, 2025 at 7:19 PM
親友們說想看我 cos M200。
沒玩過 Girls' Frontline，但大概還是略有了解。
只是感覺自己的外貌過不了自己這一關呢。
My friends wanted to see me cosplay M200.
Although I never played Girls' Frontline, I know some of it.
I just don't think I'll look good enough to satisfy myself.
沒玩過 Girls' Frontline，但大概還是略有了解。
只是感覺自己的外貌過不了自己這一關呢。
My friends wanted to see me cosplay M200.
Although I never played Girls' Frontline, I know some of it.
I just don't think I'll look good enough to satisfy myself.
Nia-chan / にあちゃん
Original Character of ゆーね (x.com/ayanepuna) さん
上課的時候摸的，不過我太菜了，所以不知道身體應該怎麼畫。
然後是發現了正臉其實很難畫這一事實。
Original Character of ゆーね (x.com/ayanepuna) さん
上課的時候摸的，不過我太菜了，所以不知道身體應該怎麼畫。
然後是發現了正臉其實很難畫這一事實。
March 17, 2025 at 5:36 AM
Nia-chan / にあちゃん
Original Character of ゆーね (x.com/ayanepuna) さん
上課的時候摸的，不過我太菜了，所以不知道身體應該怎麼畫。
然後是發現了正臉其實很難畫這一事實。
Original Character of ゆーね (x.com/ayanepuna) さん
上課的時候摸的，不過我太菜了，所以不知道身體應該怎麼畫。
然後是發現了正臉其實很難畫這一事實。
AI assisted coding/designing are hyped
I do coding, designing & sometimes illustrating. It's just like people thinking AI will replace people like me soon, that's sick.
I do coding, designing & sometimes illustrating. It's just like people thinking AI will replace people like me soon, that's sick.
March 15, 2025 at 12:20 PM
AI assisted coding/designing are hyped
I do coding, designing & sometimes illustrating. It's just like people thinking AI will replace people like me soon, that's sick.
I do coding, designing & sometimes illustrating. It's just like people thinking AI will replace people like me soon, that's sick.