Author Topic: Flashing Light Prize 2018—EEVBlog Member Entries  (Read 1327 times)

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Offline jolshefsky

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Flashing Light Prize 2018—EEVBlog Member Entries
« on: February 23, 2018, 06:04:22 am »
The Flashing Light Prize 2018 concludes accepting entries on March 15, 2018. From their site:
Quote
The Flashing Light Prize is an informal and fun contest to find the most ingenious & unusual way of flashing a bulb, tube or other vessel that contains neon gas.

I'll post my entry below ... who else has 20 hours to kill editing video?  ;D
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Offline jolshefsky

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Re: Flashing Light Prize 2018—EEVBlog Member Entries
« Reply #1 on: February 23, 2018, 06:08:45 am »
As promised, here's my entry:


I'm feeding a 59Hz sine wave at about 12VRMS into the neutral side of a neon-resistor circuit tied to a voltage divider across U.S. mains 120VAC at 60Hz. It's being directly driven by the output of an op-amp with a ground common to mains neutral. By setting a voltage divider on the mains to right around the neon bulb's strike voltage, the 1 Hz frequency component of the summed waves makes the bulb turn on and off.

(Also, this is my first video uploaded that I seriously shot and edited, so yay for that.)
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Offline NiHaoMike

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Re: Flashing Light Prize 2018—EEVBlog Member Entries
« Reply #2 on: February 24, 2018, 04:35:53 pm »
There are various ways to flash all kinds of lights with a smartphone, but how many of those will work with a broken smartphone?
Cryptocurrency has taught me to love math and at the same time be baffled by it.

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