MichaelMeissner
Senior Member+
I was browsing the new products over at Sparkfun, and they have a new shield for Teensy 3.1 to fit it into an Arduino form factor: https://www.sparkfun.com/products/13288.
I noticed they have an external power jack (4-12v). In order to use it, you have to cut the VIN<->VUSB solder jumper on the Teensy. However, they don't bring out VUSB to a pin, nor do they seem to provide a switch or other method of using the 5v power from USB.
They give you access to the other inner through hole pins (A10, A11, AREF) as well as A8/A9 in a separate 6 pin header.
The shield is clearly designed for the 3.1, having the battery for the real time clock. They don't bring out Vbat to the back, so you don't have access to the special A3 output pin of the LC.
There is a solder jumper whether A6/A7 are routed to the A4/A5 Arduino pins instead of A4/A5. A4/A5 will still be routed to the 2 i2c pins on the shield. There is no mention of pull-up resistors on the 2 i2c pins on the shield, so I would assume you probably should add them in doing i2c if your devices don't already pull-up resistors.
There is a comment in the setup guide about using the SPI header in case you have an AVR programmer that probably should be ignored.
They don't ship 14 pin female headers, but instead ship a larger female header that you have to cut down to 14 pins.
I tend to think the nRF24L01+ shield might be more generally useful (even without nRF24L01+) than the Sparkfun shield: https://www.tindie.com/products/pico/rfx-teensy-3x-nrf24l01-carrier-board-w-prototyping-area-/
Or the protoboard/shield that gives you access to the bottom pins: https://www.tindie.com/products/freto/teensy-3-breakout-board-and-shield/
I noticed they have an external power jack (4-12v). In order to use it, you have to cut the VIN<->VUSB solder jumper on the Teensy. However, they don't bring out VUSB to a pin, nor do they seem to provide a switch or other method of using the 5v power from USB.
They give you access to the other inner through hole pins (A10, A11, AREF) as well as A8/A9 in a separate 6 pin header.
The shield is clearly designed for the 3.1, having the battery for the real time clock. They don't bring out Vbat to the back, so you don't have access to the special A3 output pin of the LC.
There is a solder jumper whether A6/A7 are routed to the A4/A5 Arduino pins instead of A4/A5. A4/A5 will still be routed to the 2 i2c pins on the shield. There is no mention of pull-up resistors on the 2 i2c pins on the shield, so I would assume you probably should add them in doing i2c if your devices don't already pull-up resistors.
There is a comment in the setup guide about using the SPI header in case you have an AVR programmer that probably should be ignored.
They don't ship 14 pin female headers, but instead ship a larger female header that you have to cut down to 14 pins.
I tend to think the nRF24L01+ shield might be more generally useful (even without nRF24L01+) than the Sparkfun shield: https://www.tindie.com/products/pico/rfx-teensy-3x-nrf24l01-carrier-board-w-prototyping-area-/
Or the protoboard/shield that gives you access to the bottom pins: https://www.tindie.com/products/freto/teensy-3-breakout-board-and-shield/