Six electronics experiments

Complete exact accepted source readers, blank worksheets and original diagrams. Physical and target qualification remain separate.

1. 105 — Multiroom Door Alerts: A PUBACK Is Not the Other Room’s Acknowledgement
2. 106 — Digital Microphone: A Quiet Average Can Hide Clipped Peaks
3. 107 — LM331: A Pulse Count Can Encode an Analog Voltage
4. 108 — Camera Module 3: A Frame Timestamp Is Not One Exposure Instant
5. 109 — E-Paper Keeps Pixels After the Program Stops
6. 110 — Replacing a File: Visible Now Is Not Proven Durable