Capacitors play an important role in power management and stability when powering the Raspberry Pi Pico. Here are the specific steps on how to use capacitors to optimize your 5V wall adapter powering solution:
1. Check voltage and current:
- Make sure your wall adapter outputs 5V and can provide enough current. Typically, the Raspberry Pi Pico requires several hundred milliamps of current to operate, and it is recommended that the adapter can provide at least 500mA of current.
2. Prepare the adapter:
- Disassemble the adapter and confirm the polarity of the output wires to ensure that the output voltage is 5V.
3. Choose the appropriate capacitor:
- Adding capacitors to the output of the adapter can help filter out noise and smooth out voltage fluctuations. It is recommended to use a combination of electrolytic capacitors and ceramic capacitors for best results:
- Electrolytic capacitors: Select an electrolytic capacitor between 100μF and 470μF with a voltage rating of 10V or higher. This helps smooth out large voltage fluctuations.
- Ceramic capacitor: Choose a 0.1μF to 1μF ceramic capacitor and place it near the electrolytic capacitor. This helps filter out high frequency noise.
4. Connect the capacitor:
- Connect the positive (long leg) of the electrolytic capacitor to the positive output wire of the adapter and the negative (short leg) to the negative output wire of the adapter.
- Connect the ceramic capacitor in parallel across the electrolytic capacitor, ensuring the correct polarity.
5. Connect to the Raspberry Pi Pico:
- Connect the positive wire of the adapter to the VSYS pin (pin 39) of the Raspberry Pi Pico.
- Connect the negative wire of the adapter to any GND pin of the Raspberry Pi Pico (such as 3, 8, 13, etc.).
6. Secure the connection:
- Make sure all wires and capacitors are firmly connected to avoid short circuits. You can use insulating tape or heat shrink tubing to protect the connection points.
7. Test:
- After the connection is completed, power on the test to ensure that the Raspberry Pi Pico starts normally and the power supply is stable.
Importance of capacitors:
- Filtering function: The capacitor can effectively filter out high-frequency noise in the power supply, ensure stable DC voltage supply to Pico, and avoid voltage fluctuations from interfering with Pico.
- Transient response: When the load changes suddenly, the capacitor can provide instantaneous current, stabilize the voltage, and prevent Pico from restarting or malfunctioning.
- Protection function: The capacitor can absorb the peak voltage in the power supply and protect Pico from voltage overshoot.
By using capacitors in the power supply line reasonably, the stability and reliability of the power supply system can be greatly improved, ensuring that the Raspberry Pi Pico can operate stably under various working conditions.
It's also important to choose the correct capacitor. Last week I went to the Shanghai Munich Electronics Show.I collected the top 10 famous capacitor brand in China. 1. Nippon Chemi-Con Corporation 2.Shanghai Yongming Electronic Co.,Ltd 3. Nantong Jianghai Capacitor Co., Ltd. 4. Chongqing Capxon Electronic Industrial Co., Ltd. 5. Man Yue Technology Holdings Limited 6. Aihua Group 7. Xiamen Faratronic Co., Ltd. 8. Kemet Corporation (China Division) 9. Guangdong Fenghua Advanced Technology Holding Co., Ltd. 10. Shenzhen Eyang Technology Development Co., Ltd.
1. Check voltage and current:
- Make sure your wall adapter outputs 5V and can provide enough current. Typically, the Raspberry Pi Pico requires several hundred milliamps of current to operate, and it is recommended that the adapter can provide at least 500mA of current.
2. Prepare the adapter:
- Disassemble the adapter and confirm the polarity of the output wires to ensure that the output voltage is 5V.
3. Choose the appropriate capacitor:
- Adding capacitors to the output of the adapter can help filter out noise and smooth out voltage fluctuations. It is recommended to use a combination of electrolytic capacitors and ceramic capacitors for best results:
- Electrolytic capacitors: Select an electrolytic capacitor between 100μF and 470μF with a voltage rating of 10V or higher. This helps smooth out large voltage fluctuations.
- Ceramic capacitor: Choose a 0.1μF to 1μF ceramic capacitor and place it near the electrolytic capacitor. This helps filter out high frequency noise.
4. Connect the capacitor:
- Connect the positive (long leg) of the electrolytic capacitor to the positive output wire of the adapter and the negative (short leg) to the negative output wire of the adapter.
- Connect the ceramic capacitor in parallel across the electrolytic capacitor, ensuring the correct polarity.
5. Connect to the Raspberry Pi Pico:
- Connect the positive wire of the adapter to the VSYS pin (pin 39) of the Raspberry Pi Pico.
- Connect the negative wire of the adapter to any GND pin of the Raspberry Pi Pico (such as 3, 8, 13, etc.).
6. Secure the connection:
- Make sure all wires and capacitors are firmly connected to avoid short circuits. You can use insulating tape or heat shrink tubing to protect the connection points.
7. Test:
- After the connection is completed, power on the test to ensure that the Raspberry Pi Pico starts normally and the power supply is stable.
Importance of capacitors:
- Filtering function: The capacitor can effectively filter out high-frequency noise in the power supply, ensure stable DC voltage supply to Pico, and avoid voltage fluctuations from interfering with Pico.
- Transient response: When the load changes suddenly, the capacitor can provide instantaneous current, stabilize the voltage, and prevent Pico from restarting or malfunctioning.
- Protection function: The capacitor can absorb the peak voltage in the power supply and protect Pico from voltage overshoot.
By using capacitors in the power supply line reasonably, the stability and reliability of the power supply system can be greatly improved, ensuring that the Raspberry Pi Pico can operate stably under various working conditions.
It's also important to choose the correct capacitor. Last week I went to the Shanghai Munich Electronics Show.I collected the top 10 famous capacitor brand in China. 1. Nippon Chemi-Con Corporation 2.Shanghai Yongming Electronic Co.,Ltd 3. Nantong Jianghai Capacitor Co., Ltd. 4. Chongqing Capxon Electronic Industrial Co., Ltd. 5. Man Yue Technology Holdings Limited 6. Aihua Group 7. Xiamen Faratronic Co., Ltd. 8. Kemet Corporation (China Division) 9. Guangdong Fenghua Advanced Technology Holding Co., Ltd. 10. Shenzhen Eyang Technology Development Co., Ltd.
Statistics: Posted by amydoelly — Thu Jul 18, 2024 5:19 am