3D Robotics OSD 3DR User Manual

Remzibi’s OSD 3DR (with DIY Drones version firmware)

This tutorial is intended to be used with Happy Killmore’s manual (link). This tutorial will cover how to
assemble your Remzibi’s OSD 3DR, and will cover the basic differences in hardware features between

the Original Remzibi’s OSD and the Remzibi’s OSD 3DR with DIY Drones version firmware – including the
Status LED and how to switch between modes – which you will need to following Happy Killmore’s
manual.

What your Remzibi’s OSD 3DR comes with:

 Pins: all of the pins you will need to solder onto the board:

o (1) 3x8 header pins
o (1) 1x20 header pins
o (1) 3x2 header pins
o (1) battery adapter

 DIY Drones Remzibi’s OSD cable: It's an FTDI cable, but with a 4-pin female header instead of

the usual 6-pin (this was done to keep compatibility with the OTI cable that the original Remzibi
used). You can also use your standard FTDI cable, but you will have to use some extra wires to
make the required connections. This will be covered later in the tutorial.

You will also need:

 GPS Any GPS that uses serial can be used. In this tutorial, I will be using the MediaTek GPS with

basic adapter offered at the DIY Drones store here.

Important note: the DIY Drones Mediatek GPS comes with custom DIY Drones firmware

and must be programmed with the factory default firmware to work with the Remzibi’s OSD.

Updating the firmware is simple to do, and instructions for how to do this will be covered later
in this tutorial.

 Video Camera and transmitter/receiver check out rcgroups.com for more information on video

5V/600mA switching regulator

Reset Switch

SW1 Switch

modes

ATMEL Mega32A chip

MAX7456 Chip

And many user-defined settings!

Video In/Out

Serial Port

or connecting

RSSI

Measure radio
signal strength

Motor Battery

voltage

transmitters and receivers, and to learn more about FPV flight.

 12 Volt Battery
 R/C Plane well suited for FPV (ie Brushless EasyStar)

Details about the Hardware

Board measurements: 1.6 in x 1.1 in ( 4cm x 2.7cm)

256 User-defined characters or
pictographs
12x18 Pixel character size

New voltage regulator! It takes care
of the heating problem.

Used for GPS

to your

computer

Used to read
motor battery

Used for changing

Serial Port

Used for GPS

computer

I2C port

ADC ports

and clock ports

Video In/Out

Battery

Motor

RSSI

strength

+

RSSI

Silkscreen

or connecting
to your

(“AN3”-“AN5”
& “CURRENT”)

―

Battery

Used to read
motor battery
voltage

Measure
radio signal

correction for the
release version

Important Revision Note: The release version of the Remzibi’s OSD 3DR, has an error on the silk screen
label on the back side of the board: the silkscreen currently reads "-, +, RSSI" when it should be "RSSI, -,
+". This correction is shown above. Please be aware of this before you use the product.

Assembling Remzibi’s OSD 3DR

You will need to cut away some of the spare pins that came with your Remzibi’s OSD 3DR. Cut two sets
of 7 pins and one set of 2 pins from the row of 20 right angle header pins. You will have 4 pins left over.
Save them for another project! You will only need 7 rows from the block of 3x8 right angle header pins,
so you can carefully cut off one row of pins:

Here I have all of the pins cut and set next to the pads I will be soldering them to on the Remzibi board:

Carefully solder the pins onto the board. I did not solder the SCL-PC6 pins yet, but here is my Remzibi’s
OSD with all of the other pins soldered on:

Soldering a Connector for Your Battery

Female Connector Jumper Cables

Battery Adapter for Deans Connector

If you’re using a connector for your battery that is not compatible with the connector that comes with
the Remzibi’s OSD 3DR, making your own adapter is simple. You can use a JST female connector, or strip

a jumper cable with 2 pin female connector and solder it to a connector that corresponds to your
battery. Here is the adapter I used (available here) with a JST female connector and a Deans male
connector:

Connecting the GPS

You will need a GPS with serial (RX/TX) port. The GPS connects to the serial port on the Remzibi’s OSD
3Dr. This is the same port used for the FTDI cable, and it is labeled “TX RX +5V GND”. Since the serial
pins are also used for connecting your Remzibi’s OSD 3DR board to your computer, you may not want to
solder the GPS permanently onto the board. You can solder pins to your Mediatek GPS and use jumper

cables to connect it to the Remzibi’s OSD 3DR so the GPS can be removed when you need to connect the
Remzibi’s OSD board to a computer. I stripped one end of 4 jumper cables with female connectors and

soldered them directly to my MediaTek GPS: