Shared Projects

Wi2Wi W2SG0008i 1.575MHz GPS module add-on shield for Teensy 3.1. A mechanical switch toggles between UART and I2C output; 4K7 pullup resistors are on the SDA/SCL lines. Solder jumpers can be used to choose 4800 (default), 9600, and 38400 BAUD rates for NMEA protocol output to UART on Teensy Serial2, I2C supports both 100 kHz and 400 kHz rates. Solder jumpers can be used to take power and ground from the board edge transforming the shield into a conventional breakout board for breadboard use. The shield was designed for the 3V3 VIN of the Teensy but the LDK130 1.8V voltage regulator required by the GPS module can take up to 5.5V as input, making the shield in breakout-board mode ideal for any Arduino platform, even the Arduino UNO. The serial and I2C signals are logic level translated up to VIN on output from the board and down to the 1.8 V of the GPS module’s digital IO on input. There is a small SPDT button switch that sends the required ON/OFF signal to the GPS module. The passive chip antenna placement is less than perfect since it lacks a sufficiently ground-shielded feed line, which is not really wide enough to make the 50 Ohm needed. This is a compromise for the small size of the board, which allows the add-on function without overwhelming the Teensy form factor.

Thermocouple 1-wire interface

http://budgetlightforum.com/node/35674

budgetlightforum.com/node/35674

Control board for buoyancy engine

Flashes Some LEDs

951 Speedo and Boost Gauge Controller

G4 LED halogen 20W replacement

Replacement: https://oshpark.com/shared_projects/NqzXPzzl

nRF24L01+ 2.4 GHz radio add-on board for Teensy 3.1 with smaller 16 MHz crystal and improved in-board antenna instead of low-range ceramic antenna

That ^

Small PCB with 3x7segments LA6780 and MAX7219 driver. I2C and power connections available.

Breakout board for AtMega 32u4. Fits snugly in a breadboard.

The Yaesu FT-736R remains a popular satellite ground station transceiver. However some modern computer software is not compatible with the CAT interface on the FT-736R. Ham Radio Deluxe, in particular, does not support the FT-736R. Ham Radio Deluxe does support the Yaesu FT-847 which has similar features. We can solve this incompatibility by programming a CAT interface to present a FT-847 to the PC and emulate the new commands not supported on the FT-736R.

Features not present on the FT-736R are ignored. Memory channels are not supported and the radio must be set to VFO, also satellite mode must be set to VFO, before enabling CAT control of the radio. 1200 MHz is mapped to 200 MHz because the FT-847 does not have 4 MHz digits.

== Notes

• HamSpot.com sells fully and partially assembled boards

• N6BIL FT-736R Hardware Emulator

• This is a slight modification of the GPL v3 licensed interface designed by Chuck Jones, N6BIL.

• The concept for this interface was developed by Dave Dowler, KA6BFB in 2010. He developed a proof of concept in software using VB and Windows.

PCB for Mini-Circuits SMD phase shifter with BK276 package and 214 layout; includes circuit to generate V_bias with pot control

Open BLDC Hardware - Strip board v0.1

http://open-bldc.org/wiki/Open-BLDC

4 layer board of 2.8x0.47 inches (71x12mm). $13.20 for three.

Open BLDC Hardware - Power_Driver board v0.3

http://open-bldc.org/wiki/Open-BLDC

4 layer board of 1.91x0.83 inches (49x21mm). $15.70 for three.