Reposted from 
Glass Resource Exchange Archive!
This is an Instructable to walk you through how to make a sensor-controlled relay power strip using an IR sensor.
“I am an instructor who teaches Plasma Design in the Scientific Glass Technologies program at Salem Community College. One of the challenges has been finding a reliable and affordable transformer to run small plasma displays. Unfortunately, there are not many products on the market, so I decided to make a device which can be used with any transformer to initiate and control the length of time a bulb is turned on. It works great for student displays, especially with Tech22’s L7020 transformer.
I use this device in my own plasma work, and find it handy to use in exhibitions. The device is designed to minimize the risk of injury or the glass being damaged, uses less power, and extends the life of the transformer. By waving their hand in front of the sensor, viewers can initiate the illumination of a plasma bulb without touching the device itself, retaining the interactive quality that is unique to plasma displays. The timer can be set to customize the output for many different situation, including animating the plasma display.
Although this device was designed for use with plasma displays, the output can be any device that plugs into a standard plug on the power strip. It could be used for many other purposes, including art installations.”
- Limits the amount of time transformer is on, keeping plasma display from overheating and extending the life of the transformer
- Optimizes use of plasma in exhibition or installation, so that plasma display is only activated by the presence of the viewer and remains off the rest of the time, making for minimal maintenance by the gallery staff, and adding an extra layer of safety, and conserving energy.
- Optimizes off-the-shelf transformers (such as Tech22’s L7020) to light high-pressure plasma designs for short durations of time without overheating.
- Provides ability to animate multiple plasma displays by changing the code on the microcontroller.
- Introduces students to electronics, using sensors and microcontrollers, and coding, by building this device.
This Instructable was designed for use in the Plasma Design course at Salem Community College as part of the Scientific Glass Technology program and was supported in part by a Teaching Artist Cohort Grant from the Center For Craft in 2023. Many thanks to those who supported, tested, and facilitated the development of this project.
In the spirit of giving back to the community, This Instructable is protected by a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 (CC BY-NC-SA 4.0 © 2024 by Amy Lemaire) International license, through which it is my intent to keep this information accessible and free for educators.
This license requires that reusers give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, for noncommercial purposes only. If others modify or adapt the material, they must license the modified material under identical terms.
