Cheap Voltage/Amperage Alarm Device?

  • Thread starter Thread starter jb10929
  • Start date Start date
  • Tags Tags
    Device
AI Thread Summary
A user is seeking a low-cost alarm device that activates when a specific voltage or amperage threshold is exceeded. They acknowledge the possibility of limiting current but emphasize the need for an alert system. The discussion invites clarification on the type of power source involved, such as AC mains or another source, to provide better recommendations. Additional context about the devices consuming power would help in identifying suitable options. The thread highlights the importance of understanding the application to find an effective solution.
jb10929
Messages
1
Reaction score
0
Does anyone know of a low cost "alarm device" that is triggered by a preset power amount? In other words, I need an alarm that goes off when an amount of volts or amps are present. I realize that there there are many things that I could do to inhibit the amount of current, however I would like something that actually alerts me when a preset value is exceeded. I know very little about about electrical engineering and after searching the internet I figured I'd post here. Thanks ahead of time for any help anyone has to offer.
 
Engineering news on Phys.org
jb10929 said:
Does anyone know of a low cost "alarm device" that is triggered by a preset power amount? In other words, I need an alarm that goes off when an amount of volts or amps are present. I realize that there there are many things that I could do to inhibit the amount of current, however I would like something that actually alerts me when a preset value is exceeded. I know very little about about electrical engineering and after searching the internet I figured I'd post here. Thanks ahead of time for any help anyone has to offer.

Welcome to the PF.

What kind of device is consuming the power? Is this AC Mains power from the wall, or power from some other source?

If you can provide more context, we can help you understand your options better.
 

Thread 'How might electronics be different if AC voltage was 72V at 45 Hz?'

Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
View full post »

Thread 'What happens if shielded cable has a short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'Why does the amperage go real high if there is a low voltage short?'

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
View full post »

Similar threads

Could you use Solar to power a DC to AC Inverter? (Description below)
Replies
6
Views
3K
Why Is My DIY Grounding Mat Triggering the Volt Meter Alarm?
Replies
5
Views
3K
How to calculate the accurate capacity of a battery?
Replies
11
Views
4K
Solving Power Delivery Issues in a 5V Series Circuit with a 1.5V Rated Relay
Replies
12
Views
3K
DC to DC boost converter malfunctioning
Replies
9
Views
4K
Can Ohm's Law be applied to all types of devices and power sources?
Replies
6
Views
6K
How to Make a 24V Transformer Output 24V?
Replies
18
Views
4K
Limiting amps and volts from a battery
Replies
7
Views
2K
"Ground" and "Center Tapped" Power Transformer Secondary in guitar amp
Replies
6
Views
4K
Low voltage across low resistance for heating elements
Replies
21
Views
7K

Hot Threads

Recent Insights

Back
Top