See last page for copyright and document info, File: Reeve_GpsNtp-Pi_Setup.doc, Page 2
2. Hardware Assembly
This project was developed on an unmodified Raspberry Pi model B+. It most likely will work on the model B but
has not been tested. The RPi is operated “headless”; that is, it is used without a directly connected keyboard,
mouse or monitor. All provisioning is done from a PC running an SSH terminal program and connected to the
same LAN as the RPi. The hardware requirements and costs are shown in table 1.
Table 1 ~ Hardware Requirements and Costs
Description
Adafruit
HAB Supplies
Notes
Base system
Raspberry Pi B+, 35 USD
Raspberry Pi B+, 35 USD
Note 1
GPS receiver assembly
Ultimate GPS Hat for Raspberry Pi
{
GPSHat
}, 45 USD
Raspberry Pi+ GPS Expansion
Board {
GPSHAB
}, 70 USD
Note 1
Battery for GPS RAM
CR1220, 2 USD
CR2032, 2 USD
Note 3
Onboard antenna connector
U.FL-M
SMA-F
External active antenna
Optional, 13 USD
Required, 15 USD
Note 4
Internal patch antenna
Yes
No
Flexible jumper cable
Optional, 4 USD
Not required
Note 5
Soldering required
Yes
Yes
Note 6
Mounting hardware required
See hardware list
See hardware list
Note 2
RPi power supply
5 Vdc 5 W
5 Vdc 5 W
Note 7
Table 1 notes:
1. Prices are as-of February 2015 and do not include shipping. The HAB Supplies price includes an active antenna.
2. The Adafruit product does not include any hardware for rigidly mounting the GPS daughterboard to the RPi or for
mounting the RPi to a chassis. The HAB Supplies product includes only 2 of 4 spacers needed for the GPS board
and none for the chassis mounting. See Table 2..
3. Batteries are user supplied. The HAB Supplies GPS board is incorrectly marked CR2023.
4. Each vendor has related antenna products that can be purchased with the receiver.
5. A flexible jumper is needed between the RPi board connector and an external antenna cable to reduce stress on
the connectors.
6. Soldering requirements are minor and described in more detail below.
7. The RPi uses a micro-USB connector for power but it cannot be powered from a PC USB port. Both GPS boards
require 3.3 Vdc, which is obtained from the RPi onboard power supply.
Table 2 ~ Hardware list
Item
Qty
Remarks
M2.5 x 11 mm stud spacer
4
Note 1
M2.5 x 6 mm stud spacer
4
Note 2
M2.5 hex nut
4
Flat washer, 2.5 mm
8
Lock washer, 2.5 mm
8
M2.5 x 4 mm flat head screw
4
Chassis, 100 x 70 x 1.6 mm
1
Aluminum
Rubber feet
4
Hardware List Table notes:
1. Qty can be reduced to 2 if the additional spacers exactly
match the length of the spacers supplied.
2. These spacers may be any convenient length to ensure
adequate spacing from the aluminum chassis.
