- #1
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Discussion Overview
The discussion revolves around the implications of connecting a 12-volt DC source to a 120-volt AC supply through a diode. Participants explore the potential risks and behaviors of the battery and circuit under these conditions, touching on safety concerns and theoretical outcomes.
Discussion Character
- Debate/contested
- Technical explanation
- Conceptual clarification
Main Points Raised
- Some participants suggest that when the AC voltage drops below 12 volts, it could theoretically draw current from the battery, potentially leading to dangerous outcomes such as battery explosion.
- Others argue that during the negative cycle of the AC, current would flow from the battery through the diode, which could result in excessive current that damages the battery and other components.
- One participant proposes a circuit design involving a switch and relays to manage the connection between the DC and AC sources, although the feasibility and safety of this approach are not fully explored.
- There is a strong emphasis on safety, with warnings against attempting such connections without proper understanding and precautions.
Areas of Agreement / Disagreement
Participants express significant concern regarding the safety and practicality of connecting a 12-volt DC source to a 120-volt AC supply, indicating a general consensus on the dangers involved. However, the specific technical outcomes and behaviors of the circuit remain contested and unresolved.
Contextual Notes
Limitations include assumptions about ideal sources and the lack of detailed analysis on the circuit's behavior under various conditions. The discussion does not resolve the technical implications of the proposed circuit design.
Who May Find This Useful
This discussion may be of interest to individuals exploring electrical engineering concepts, safety in circuit design, and the interactions between AC and DC systems.
- #2
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Well, when the AC voltage drops below 12v and then goes into the negative part of its cycle, it will pull current out of the battery, theoretically an infinite amount assuming ideal sources, thereby causing the battery to explode. Don't try this at home, kids !
- #3
sophiecentaur
Science Advisor
Homework Helper
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This is not a good idea. During the negative cycle of the AC (the + and- are reversed) and current will flow from the + of the battery through the diode- in fact, as soon as the AC terminal voltage drops below +11.4 volts or so and the current will eventually be so high that it will knacker the battery, melt the wires , blow a fuse.
Don't touch mains voltages or big batteries until you can answer this sort of question yourself, without asking anyone. Be safe.
Don't touch mains voltages or big batteries until you can answer this sort of question yourself, without asking anyone. Be safe.
- #4
- #5
berkeman
Admin
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John1397 said:
John1397 said:
Wow, crazy dangerous. Thread is closed.