Introduction
is an open-source sprinkler / irrigation extension board for the Raspberry Pi. It’s an easy and
low-cost solution to transform your Raspberry Pi into a capable sprinkler controller with unlimited number of stations, for
lawn and plant watering, farm irrigation and other similar applications.
The OSPi v1.4x kit includes a set of laser cut acrylic enclosure, one assembled and tested OSPi circuit board and terminal
blocks. The built-in components include 24VAC to 5VDC switching regulator, solenoid drivers, PCF8591T 8-bit ADC
converter (4 input and 1 output), per-station transient voltage protector.
NOTE
: from version 1.44, the real-time clock
(RTC) and battery that were in previous versions have been removed, as the firmware never uses these components.
To get started, you will also need the following, which are
NOT
included by default and need to be purchased separately.
●
a Raspberry Pi (any version)
●
a
(optional, if your RPi does not have built-in WiFi)
●
a
●
24V AC
(output voltage 24V AC -- note that it’s AC,
not DC!
)
o
Note: if you plan to use RPi 3 or 4: due to the rather high power consumption of these RPis, you may need an
additional USB adapter to power RPi directly through its microUSB port.
●
24V AC
(note that it’s 24V AC valve,
not DC or latching solenoid valve!
)
