In the provided project details, we have one Integrated Circuit (IC) explicitly mentioned, which is U1 with MPN: LM324N. To determine the appropriate decoupling capacitors for U1 (LM324N), we need to identify any capacitors directly connected to its power supply pins. Based on the typical design practices, decoupling capacitors are usually placed between the power supply (VCC) and ground (GND) pins of ICs to stabilize the power supply and filter out noise. Unfortunately, the detailed description does not explicitly mention decoupling capacitors tied to U1 (LM324N), nor does it provide specific nets that indicate these connections directly. Thus, without explicit information on the IC's power net or attached capacitors, we adhere to standard assumptions and warnings as per guidelines.

This overview reflects the available data within the project description. If decoupling capacitors are indeed planned but not specified in the project description, consider reviewing and adding them according to best engineering practices and the IC manufacturer's recommendations.