Difference between revisions of "Hardware: PCB Assembly"
(→Install male headers) |
(→Install RJ1 and RJ2) |
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| Line 84: | Line 84: | ||
Be very careful to check that all the leads are in the holes before you snap it in | Be very careful to check that all the leads are in the holes before you snap it in | ||
| + | ===Install the HX711 board=== | ||
| + | #Install C1 4.7 mfd. Observe polarity. | ||
#Insert the 1x4 and 1x6 female headers on the make headers. | #Insert the 1x4 and 1x6 female headers on the make headers. | ||
#Install the HX711 board on the 1x4 and 1x6 female headers. | #Install the HX711 board on the 1x4 and 1x6 female headers. | ||
| + | |||
| + | ===LED=== | ||
#Install LED D1. | #Install LED D1. | ||
| − | + | ||
#Install C3 .1 mfd. for rain gauge filter. | #Install C3 .1 mfd. for rain gauge filter. | ||
| − | |||
| − | Power Supply 1 | + | ===Install 12 VDC power supply if used.=== |
| + | |||
| + | |||
| + | ====Power Supply Option 1==== | ||
#Install four 1x2 male headers. | #Install four 1x2 male headers. | ||
#Install blue screw terminal block. | #Install blue screw terminal block. | ||
| Line 97: | Line 103: | ||
#Install the Power Supply board on the four 1x2 female headers. | #Install the Power Supply board on the four 1x2 female headers. | ||
| − | + | ====Power Supply Option 2==== | |
#Install Fulree voltage regulator | #Install Fulree voltage regulator | ||
#Install green spring terminal block. | #Install green spring terminal block. | ||
Revision as of 04:13, 26 January 2016
Contents
Parts
Mechanical Drawing for RJ connectors.
Board Layout
Connectors.
Console and 12 V power supply option 1.
Spare GPIO, I2C and I2S headers.
Assembly
Install 40 pin header
1. Insert the 2x20 female header from the bottom side of the board.
- Error creating thumbnail: File missing
1.1 Insert the header from the bottom.
- Error creating thumbnail: File missing
1.2 Solder one pin on each end.
- Error creating thumbnail: File missing
1.3 Check the connector for alignment.
- Error creating thumbnail: File missing
1.4 Melt solder and straighten.
2. Solder the header on the top (component, silk screen) side of the board.
- Error creating thumbnail: File missing
2.1 Solder the rest of the pins.
Install the resistors
| Number | Value (Ohms) | Purpose |
|---|---|---|
| R1 | 330 | Controls brightness of LED |
| R2 | 200K | 12 V monitoring voltage divider |
| R3 | 1K | 12 V monitoring voltage divider |
| R4 | 2.2K | 12 V monitoring Reference voltage divider |
| R5 | 2.2K | 12 V monitoring Reference voltage divider |
| R6 | 1K | Rain gauge input filter |
- Error creating thumbnail: File missing
2.1 Insert the resistors.
Install male headers
Required
- H8 1x4 and H9 1x6 for the HX711 board.
Optional
- H4 1x4 for console serial port
- H2 1x5 for I2C
- H6 1x5 for spare GPIO
- H7 1x7 for I2s
- 4 1x2 for 12 V power supply option 1.
1.2
Install RJ1 and RJ2
Be very careful to check that all the leads are in the holes before you snap it in
Install the HX711 board
- Install C1 4.7 mfd. Observe polarity.
- Insert the 1x4 and 1x6 female headers on the make headers.
- Install the HX711 board on the 1x4 and 1x6 female headers.
LED
- Install LED D1.
- Install C3 .1 mfd. for rain gauge filter.
Install 12 VDC power supply if used.
Power Supply Option 1
- Install four 1x2 male headers.
- Install blue screw terminal block.
- Install four 1x2 female headers on the four 1x2 male headers.
- Install the Power Supply board on the four 1x2 female headers.
Power Supply Option 2
- Install Fulree voltage regulator
- Install green spring terminal block.
Testing
If using Power Supply Option 1, the voltage must be adjusted to 5.o to 5.1 volts before connecting to the Pi or HX711 board.
