mains

have a heller sienna ceiling fan in my roof which has a remote connected which can dim the light and change the fan speed. I have recently purchases a smart bulb which I want to go in there. To do this, I want to remove it completely from the dimmer so when the light switch is on, the light gets...

I am a novice. I need a device that will beep once when my 220V goes off, and maybe beep twice (or make a different sound) when the power goes on again. No reset buttons or switches needed. I just need to be alerted. Any help with a circuit diagram and part names will be much appreciated. I...

I am constructing a filter unit that is intended to allow visualisation (on a scope) and measurement of high-frequency interference on 240v UK mains by means of a high-pass filter to remove the 50 Hz component. What would be the best (and safest) circuit to isolate the unit from the mains while...

Hi all, I'm making a custom application and I need a source for a device that takes 300mA - 48VAC at 50 Hz to power. I can easily get the 48V, but how can I get it to 50 Hz? All I've got so far is just trying to rectify it and then using a function generator, but is there another way that wont...

Hello all, New to the forum and came here to get some more information about simulating mains voltage Triac circuits. My issue is the following; I have an opto-isolated TRIAC control circuit for a resistive load (water boiler). I know that Triacs generally have a junction voltage drop of ~1-3V...

Hi, I recently had a fault occurring whilst connecting my laptop to my mixing desk whilst having multiple new DMX fixtures connected to a USB interface. Whilst checking for faults I discovered a voltage of about 80-90V between the DMX port on the fixture and the Earth Connector. Knowing that the...