1. K

    Repairing Christmas/Fairy Lights

    I have a little experience with wiring after having to hot-wire my aftermarket radio in my car when changing it out, however I do not know how to fix this issue. The wires in the plug were loose and the lights were not turning on because of this, so i cut it off and figured it'd be as simple as...
  2. T

    Needing to replace lighting controller

    Hey everyone, Hoping someone can help me out with this. I have a church that has an 8 scene programmable lighting switch (Leviton 408CP Luma-net Remote Memory Control Panel) but either they no longer sell these or they are literally out of stock everywhere. I was wondering what I could replace...
  3. Lambo Av

    Doubts on How Connector Works

    Hi all, I am currently reviewing this Degson DG2002-4.0 connector. https://www.degson.com/content/details_123_10715.html May I know what does the arrow above the connector mean? And what do the holes beside the arrow does? Based on the photo below, there is this operating tool which can be...
  4. R

    How to power an old LED lamp via USB

    Disclaimer: I'm not an engineer, just a DIY enthusiast. So I have an cheap old plastic SMD LED desk lamp but its battery and circuit board are missing. I want to turn it into a USB powered lamp for my new apartment but I'm not sure of the best way to power it. It has 31 LEDs and the label on the...
  5. alfieropson

    Potentially dangerous Mains Power supply

    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...
  6. KraakenDazs

    How do i read/use this LED flame bulb effect circuitry?

    So not really a -homework- question,apologies, but i feel its so basic it might's well be and would seem out of place/ too basic for any other categories... I like to fiddle around and my latest interest is adding lights to crafting projects. I had a few "flame effect" light bulbs i wanted to...
  7. J

    Looking for PIR Sensor/Ocupancy Sensor suggeations.

    I am in the process of building an automated lighting system for a bathroom in my home. The goal is to have the string of light turned on when the bathroom door is closed and nobody is in the room, and then have the lights turn off when someone enters the room. I want to have 3 failsafe's to...
  8. Kdt

    Improvised Ballast for Coronavirus UV Lamp

    Hi, I met a doctor on Helpful Engineering who has no ballast for his UV sterilizing lamp, this one: https://www.lighting.philips.com/main/prof/conventional-lamps-and-tubes/special-lamps/purificationwater-and-air/residential-water-and-air/tuv-tl-mini/928001104013_EU/product It is an 8W T5 tube...
  9. Lambo Av

    2 Generators connected to bus. Maximum, minimum voltage across light, peak voltage, pulsation

    2 generators are connected to the bus below. Given V1 = 300V, 50Hz V2 = 400V, 60Hz When the switch is opened, calculate i) the maximum and minimum voltage across both light 1 and 2. ii) peak voltage across both lights iii) maximum number of light pulsation How do I solve the issue above? Any...
  10. D

    Need help powering LED

    so I took the LED strip out of my tv or to be more accurate 3 LED strips (6 bulbs each) I thought if I took a strip down to 4 I could hook it up to 12v power and it would light but I have gotten nothing, anyone willing to help me figure how to power these?
  11. S

    Gravity Sensor for Light Switch

    Hello AAC! Running into some issues with my current light switch design, and realizing that, if possible, I would like to change my setup to include some sort of sensor that can detect movement. Basically, my application for this bedroom light would be to have the light turn on and off based on...