Greetings, first time posting here.
I'm attempting to create a USB volume control / mixer device for my PC.
I have the following hardware:
My concern is powering all of this from USB or should I go for an external power supply? The Encoders and varistors are all passive devices without much current draw. The OLED is also a lower current draw, but the NeoPixels are my main concern. Their website suggests ~18mA for each LED.
If my math is correct that means ~576mA for all 32 on at one time. This is above I think the 500mA USB current limit, yes?
Plus I'd need some sort of interface / level shifter in between the Teensey and the Neopixels (3.3V to 5V). Still reading up on how to do that.
Any help or comments would be appreciated. I can try and create a schematic if that would be helpful.
Edit: Final thought, this is going to be on my desk above my keyboard, so low brightness is a benefit. I don't need the LED's very bright.
Thanks!
I'm attempting to create a USB volume control / mixer device for my PC.
I have the following hardware:
- Teensey 3.2
- 4x NeoPixel Stick (8x 5050 RGB from adafruit: 32 total LED's)
- 2x Thinpot slider variable resisters
- 2x Rotary Encoders
- 1x Amazon Diymall 0.96" Inch I2c IIC Serial 128x64 Oled LCD Display
- Various other resistors and caps.
My concern is powering all of this from USB or should I go for an external power supply? The Encoders and varistors are all passive devices without much current draw. The OLED is also a lower current draw, but the NeoPixels are my main concern. Their website suggests ~18mA for each LED.
If my math is correct that means ~576mA for all 32 on at one time. This is above I think the 500mA USB current limit, yes?
Plus I'd need some sort of interface / level shifter in between the Teensey and the Neopixels (3.3V to 5V). Still reading up on how to do that.
Any help or comments would be appreciated. I can try and create a schematic if that would be helpful.
Edit: Final thought, this is going to be on my desk above my keyboard, so low brightness is a benefit. I don't need the LED's very bright.
Thanks!
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