Discussion Overview
The discussion revolves around the unexpected output voltage of a power supply labeled for 9-12 V, which measures 16 V when tested. Participants explore the characteristics of different types of power supplies, particularly focusing on whether they are regulated or unregulated, and the implications for sensitive devices.
Discussion Character
- Technical explanation
- Debate/contested
Main Points Raised
- One participant notes that the power supply outputs 16 V instead of the expected 9-12 V, raising questions about its specifications.
- Another participant suggests the possibility of being plugged into a higher voltage outlet (220V instead of 110V) as a potential cause for the high output.
- It is proposed that the power supplies might be linear, which can output higher voltages when unloaded, as referenced in an article about AC-DC power supplies.
- A participant mentions that many "plugpacks" are unregulated, leading to higher output voltages when not under load, and emphasizes the importance of knowing whether a power supply is regulated.
- One participant indicates that they tested the power supply under load but still measured 16 V, suggesting the load may not have been appropriate.
- Another participant asserts that unregulated supplies will always show higher voltages when lightly loaded or unloaded, reinforcing the idea that the power supplies in question are likely unregulated.
- A later reply discusses that power supplies designed for battery charging may intentionally output higher voltages to accommodate charging needs, using examples like phone stations and car batteries.
Areas of Agreement / Disagreement
Participants generally agree that the power supplies are likely unregulated and that this can lead to higher output voltages under certain conditions. However, there is no consensus on the specific characteristics of the power supplies in question, as details about their brands and types remain unclear.
Contextual Notes
Participants mention the importance of load conditions and whether the power supplies are regulated or unregulated, but do not resolve the specifics of the measurements or the implications for the sensitive devices being used.