Amp dangers from a universal power supply adapter

Click For Summary
SUMMARY

The discussion centers on the use of a universal power supply adapter with a treadmill display monitor that requires a 6V input and has a current rating of 1.66-2.0A. A user inquired about potential damage from using a 3A adapter. It was concluded that no damage should occur, as the adapter operates as a constant voltage source, allowing the device to draw only the current it requires. This principle is based on Ohm's Law (V=IR), which governs the relationship between voltage, current, and resistance.

PREREQUISITES
  • Understanding of Ohm's Law (V=IR)
  • Knowledge of AC/DC power supply characteristics
  • Familiarity with electrical current ratings and their implications
  • Basic concepts of consumer electronics power supplies
NEXT STEPS
  • Research the differences between constant voltage and constant current power supplies
  • Learn about the specifications of universal power adapters
  • Investigate the impact of using power supplies with varying amp ratings on electronic devices
  • Explore safety standards for consumer electronics power adapters
USEFUL FOR

Electronics enthusiasts, DIY hobbyists, and anyone involved in the design or maintenance of consumer electronic devices, particularly those using power adapters.

nodak65
Messages
1
Reaction score
0
I have a treadmill that has a display monitor that uses either 4 D cell batteries or an optional adaptor. The back of the monitor states it uses a 6v 1.66-2.0a/max input. I purchases a universal power adaptor that has a fixed amp rating of 3 (6v obviously is an option). The question is: what damage can occur if I use this adaptor that has a amp output that EXCEEDS the display monitor's 1.6-2amp requirement? Thanks! Nodak65
 
Engineering news on Phys.org
The 2A for the display is just what the load will take and the 3A rating of the power supply is just its maximum capabilities. No damage should occur.
 
Remember, your AC/DC adapter is a constant voltage source, not a constant current source. V=IR and all that. Almost all consumer electronic power supplies are constant voltage sources. You will rarely have a constant current source provided in a consumer product.
 

Similar threads

  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 36 ·
2
Replies
36
Views
5K
  • · Replies 11 ·
Replies
11
Views
2K
Replies
61
Views
9K
Replies
7
Views
3K
  • · Replies 13 ·
Replies
13
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
19
Views
3K
  • · Replies 9 ·
Replies
9
Views
4K