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https://www.sparkfun.com/teensy-4-1.html
Teensy 4.1 | For Sale at SparkFun Electronics - SparkFun Electronics
The Teensy 4.1 delivers 600MHz ARM Cortex-M7 processing power in a larger form factor, featuring 8MB flash, Ethernet, a microSD socket, and a USB host port.
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https://www.sparkfun.com/teensy-4-audio-shield-rev-d.html
Teensy 4 Audio Shield (Rev D) | For Sale at SparkFun - SparkFun Electronics
The Teensy 4 Audio Shield is a codec board for the Teensy 4.0 that provides 16-bit, 44.1kHz stereo audio input/output, a headphone amp, and a microSD card slot.
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https://www.sparkfun.com/teensy-4-1-headers.html
Teensy 4.1 (Headers) | For Sale at SparkFun Electronics - SparkFun Electronics
The Teensy 4.1 (Headers) combines the 600MHz ARM Cortex-M7, 8MB flash, Ethernet, and microSD socket with pre-soldered header pins for immediate prototyping.
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https://www.sparkfun.com/ethernet-kit-for-teensy-4-1.html
Ethernet Kit for Teensy 4.1 | SparkFun Electronics - SparkFun Electronics
The Ethernet Kit for Teensy 4.1 is a DIY soldering kit that provides the MagJack and all required parts to add a wired network connection to your Teensy 4.1.
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https://www.sparkfun.com/teensy-4-1-without-ethernet.html
Teensy 4.1 without Ethernet | Available at SparkFun - SparkFun Electronics
The Teensy 4.1 without Ethernet features, features the 600MHz ARM Cortex-M7, 8MB flash, a microSD socket, and a USB host port in a streamlined version.
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https://hackerboards.com/board/teensy-teensy-4-0
Teensy Teensy 4.0 - Board-DB: The Single Board Computer Database
Technical specifications for Teensy Teensy 4.0 on Board-DB: NXP i.MX RT1062 (1x ARM Cortex-M7 @600Mhz)
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https://www.sparkfun.com/teensy-4-1-without-ethernet-headers.html
Teensy 4.1 without Ethernet (Headers) | SparkFun Electronics - SparkFun Electronics
The Teensy 4.1 without Ethernet (Headers) combines the 600MHz ARM Cortex-M7, 8MB flash, and microSD socket with pre-soldered header pins for prototyping.
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https://www.sparkfun.com/teensy-4-1-with-copy-protection.html
Teensy 4.1, Lockable | For Sale at SparkFun Electronics - SparkFun Electronics
The Teensy 4.1, Lockable, delivers the 600MHz ARM Cortex-M7, 8MB flash, Ethernet, and microSD socket, and programmable fuse for permanent code security.
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https://www.sparkfun.com/teensy-4-0.html
SparkFun Electronics | Teensy 4.0 for Sale - SparkFun Electronics
The Teensy 4.0 is one of the fastest microcontrollers, featuring a powerful 600MHz ARM Cortex-M7 processor in the same compact form factor as the Teensy 3.2.
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https://www.sparkfun.com/teensy-4-0-headers.html
Teensy 4.0 (Headers) For Sale | SparkFun Electronics - SparkFun Electronics
The Teensy 4.0 (Headers) delivers the record-breaking 600MHz ARM Cortex-M7 processing power and comes with pre-soldered header pins for immediate prototyping.
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