Hi,

I have a protection circuit that needs to alarm when a fuse blows. The alarm needs to be a 9vdc 105db 8mA buzzer that is driven from a 120Vac power supply. I have no other load on this portion of the circuit. I do not have any room for a small transformer. Is this possible to do?? I have room for a full bridge rectifier to get my dc. How can I step down the voltage from 120 to 9 and for heat dispensing is it better to step down in ac or dc?
Thanks for any help.

 

Hello,

What you are asking is prohibited on this forum:

Restricted topics. The following topics are regularly raised however are considered "off-topic" at all times and will result in Your thread being closed without question:

• Any kind of over-unity devices and systems
• Devices designed to electrocute or shock another person
• LEDs to mains
• Phone jammers
• Rail guns and high-energy projectile devices
• Transformer-less power supplies

If You come across a thread or post discussing any of the above topics please report the thread so We can close, and if necessary remove, the offending thread/posts.

Bertus