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Raspberry Pi Zero 2 W is here! We did a 2am video and more :) AND! Sign up now to get it immediately once it arrives!
How to install Raspberry Pi camera board
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Getting the rpi to work on hdmi on this philips tv needed modifications to the config.txt, hdmi_safe=1 and hdmi_hotplug=true. It worked out of the box on composite video. Using a USB keyboard and a wireless pointer. Display is a Philips 32inch TV, with a HDMI to DVI cable. No sound as yet so a few more config.txt tweaks needed.
Power-over-Ethernet is used so that only a single Ethernet cable is needed. The red PCB contains a logic-level translator for the I2C bus and a real-time clock. The fluxgate magnetometer sensors and analogue to digital converters (ADCs) are buried in a soil pipe at a depth of 0.85m for temperature stability.
This is the original prototype version. The single power supply is susceptible to voltage sag under CPU load, which causes downward spikes in the magnetometer data. A newer design uses a DC-DC converter and linear regulator to derive a stable 5V analogue supply.