Description
Raspberry Pi 4 (2 GB RAM)
The Raspberry Pi 4 is 3x faster than its 3 B+ predecessor and offers 4x faster multimedia performance (comparable to the desktop performance of an entry-level x86-based PC).
Features
- High-performance 64-bit quad-core processor
- Dual-display support at resolutions up to 4K via a pair of micro-HDMI ports
- Hardware video decode at up to 4Kp60
- 2 GB of RAM
- Dual-band 2.4/5 GHz wireless LAN
- Bluetooth 5.0
- Gigabit Ethernet
- USB 3.0
- PoE capability (via a separate PoE HAT add-on)
Specifications
| SoC |
Broadcom BCM2711 |
| CPU |
64-bit ARM Cortex-A72 (4x 1.5 GHz) |
| GPU |
Broadcom VideoCore VI |
| RAM |
2 GB LPDDR4 |
| Wireless LAN |
2.4 GHz and 5 GHz IEEE 802.11b/g/n/ac wireless LAN |
| Bluetooth |
Bluetooth 5.0, BLE |
| Ethernet |
Gigabit Ethernet |
| USB |
2x USB-A 3.0
2x USB-A 2.0 |
| GPIO |
Standard 40-pin GPIO header (fully backwards-compatible with previous boards) |
| Video |
2x micro-HDMI ports (up to 4Kp60 supported)
2-lane MIPI DSI port (display)
2-lane MIPI CSI port (camera) |
| Audio |
4-pole stereo audio and composite video port |
| Multimedia |
H.265 (4Kp60 decode)
H.264 (1080p60 decode, 1080p30 encode)
OpenGL ES, 3.0 graphics |
| SD card |
microSD (for operating system and storage) |
| Power |
5 V | 3 A (via USB-C)
5 V | 3 A (via GPIO)
Power over Ethernet (PoE) enabled – (requires separate PoE HAT) |
Raspberry Pi 4 OR 5 AND Pico (E-book)
Cool Projects for Test, Measurement, and Control
The Raspberry Pi has dominated the maker scene for many years. Freely accessible I/O pins have made it one of the most popular processor boards of all time. However, the classic Raspberry Pi has no analog inputs. Direct measurement of analog values is therefore not possible. Consequently, photodiodes, NTCs, Hall sensors, etc. cannot be read directly. In addition, the pins are connected directly to the exposed contacts, i.e. without a driver or protection circuit. This can quickly destroy the central controller and thus the entire Raspberry Pi.
These problems can be elegantly solved with the Pico. As a front-end, it can easily handle a wide range of measurement tasks. In addition, the Pico is much cheaper than a classic Raspberry Pi 4 or 5. If a faulty circuit leads to the destruction of the Pico, this is relatively easy to handle. This makes the combination of a classic Raspberry Pi 4 or 5 and the Pico an ideal pair.
The book introduces the broad and highly topical field of modern controller technology using the combined force of a Raspberry Pi 4 or 5 and a Raspberry Pi Pico. In addition to a detailed introduction to the operation and functionality of the controller boards themselves, the book also focuses on data acquisition and processing with digital processors. Especially the combination of both systems offers a wide range of interesting possibilities.
Some practical projects from the contents:
- USB between Raspberry Pi 4 or 5 and Pico
- I²C Communication and Pico as an I²C device
- Voltmeter and Computer Thermometer
- Pico W as a Web Server and WLAN Scanner
- Frequency Meters and Generators
- OLED Displays on Raspberry Pi 4 or 5 and Pico
- Energy Saving Monitor
- Which Astronauts are in Orbit?
- Mini Monitor for Current Bitcoin Exchange Rate
