Do i need to do something special to have external power to this board to the 5v pin and if i want to plug in a usb at the same time?

The board will use the 5VB power from the USB, so if you have the USB plugged in, you don't need to also provide separate 5V power.

Do I have enough room on this board to put a simple 3 image animation .gif (thumb nail size) with out the need to add a micro SD card?

There is plenty of room for that.

does this have keyboard and mouse HID support like the 3.6?

Currently, USB serial is the only supported USB device on Teensy 4.0. USB host is fully supported on Teensy 4.0 by the USBHost_t36 library, including keyboards and mice. PJRC is planning to add most of the USB device modes for Teensy 4.0 in the upcoming 1.49 software release. USB device mode optimizations are currently in beta testing, so progress is being made.

which pin set (spacing) do I need with this board?

The pins are standard 0.1 inch (2.54mm) spacing. Here is a link to the board's specs. The dimensional drawings are near the bottom of the page. https://www.pjrc.com/store/teensy40.html#specs

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PJRC Teensea 4.0 (No Pins)

Product ID: 775341768

Details

Brand
PJRC
CPU Model
Cortex
Memory Storage Capacity
2048 KB
Model Name
Teensy 4.0
Ram Memory Installed Size
1 MB

⚡600MHz Cortex-M7 powerhouse

💾1MB SRAM + 2MB Flash memory

🔌Dual 480Mbps USB ports

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$69.83

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Description

🚀 Power your innovation with the Teensy 4.0 — where speed meets versatility!

COMPACT LIGHTWEIGHT - At just 38x13x13 mm and 10 grams, it fits perfectly into any cutting-edge project without bulk.
MASSIVE MEMORY ONBOARD - 1MB tightly coupled SRAM and 2MB flash storage ensure lightning-fast data handling and program execution.
VERSATILE CONNECTIVITY - Dual USB 2.0 ports at 480Mbps plus 3 CAN buses (including CAN FD) for seamless device integration.
BLAZING FAST PROCESSING - 600MHz ARM Cortex-M7 chip delivers desktop-class speed in a compact 1.4 x 0.7 inch form factor.
HIGH FIDELITY AUDIO SUPPORT - Dual I2S digital audio interfaces enable professional-grade sound applications.

The PJRC Teensy 4.0 is a high-performance microcontroller board featuring a 600MHz ARM Cortex-M7 processor, 1MB SRAM, and 2MB flash memory. It offers dual 480Mbps USB ports, three CAN buses including CAN FD, and dual I2S audio interfaces, all packed into a compact 1.4 x 0.7 inch form factor. Ideal for professionals seeking top-tier speed and connectivity in embedded systems.

Specifications

ASIN	B07W5J3WNH
Amazon Bestseller	#45,726 in Computers ( See Top 100 in Computers ) #327 in Single Board Computers
Brand	PJRC
Built-In Media	1 x Board
CPU Model	Cortex
Compatible Devices	Personal Computer
Connectivity Technology	USB
Customer Reviews	3.0 3.0 out of 5 stars (3)
Item Dimensions L x W x H	38L x 13W x 13H mm
Item Weight	10 Grams
Manufacturer	PJRC
Memory Storage Capacity	2048 KB
Mfr Part Number	Teensy 4.0
Model Name	Teensy 4.0
Model Number	Teensy 4.0
Operating System	DOS
Processor Brand	ARM
Processor Count	4
Processor Speed	600 MHz
RAM Memory Installed	1 MB
RAM Memory Technology	SRAM
UPC	714833879480 732387207924
Wireless Compability	802.11b

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