PC Board #2


The first pc board worked fine, but I decided to redesign it a little bit in order to accomodate:

I also used this as an opportunity to correct the pin-out order for the battery and charging connector so they match industry-standard "JST/XH" balancer plugs.


Schematic:




Board footprints and options:




Board, assembled:




LiPo battery connections:

LiPo charger connections:





Parts list:

Printed circuit board design files (gerber files)
Pololu L3G4200D 3-Axis Gyro Carrier with Voltage Regulator 1
Pololu Pushbutton Power Switch SV (optional)
Atmega328p
28 pin dip socket
3mm green led
right angle push button (if power switch is used)
right angle slide switch (if power switch is omitted)
5V regulator
100uF electrolytic capacitor
.1uF ceramic disc capacitor
330, 1.2K, 10K resistors
.1" right angle headers
.1" straight headers
7.4V 2S LiPo battery 2
2S LiPo battery charger 3
JR/Hitec servo cables 4

Notes:

1 Alternatives: L3GD20 3-Axis Gyro Carrier with Voltage Regulator or MinIMU-9 v2 Gyro, Accelerometer, and Compass (L3GD20 and LSM303DLHC Carrier)
Update: Another choice is to use one of the Chinese MPU6050 sensor boards. These are inexpensive and work very well.

2 Look for a small pack that will fit in the available space. A good choice is a pack designed for small model helicopters. These typically have dimensions of about 55mm x 30mm x 17mm. Anything up to about 60mm x 35mm x 20mm should fit.

3 Look for something that will handle 2S packs and has a wall plug. If you live in USA, make sure it works on 110VAC and has a US plug.

4 Cut a pair of servo cables and splice them together to make a male/male cable. Use it to connect the battery charger to the "CHG" port on the pc board.



Last updated 28 Nov 2014