Hi power light chaser - Page 2 - Electronic Circuits Projects Diagrams Free

Mikebits · 12th July 2008, 12:46 AM

When I use to work on HF transmitters, we could hold a fluorescent light bulb near the dummy load and it would light up.

Ubergeek63 · 12th July 2008, 01:37 AM

Quote:

Originally Posted by Hejuco

I am trying to assemble a "light chaser LED" style circuit. But instead of 9volts to power LEDS I need to it to handle at least 50KV/5ma. Any ideas on how to I can keep the exsisting 555 timer w/ 4017IC and instead of LEDS I can susbstitute them with switching type transistors? I am working on an
Asymmetrical Capacitor aka "lifter". I have an idea on a particular configuration. Please feel free to ask any questions. Thanks in advance.

I have two here, an orange tabby and a Maine coon!

shokjok · 12th July 2008, 05:28 AM

Your suggestion is workable. 50KV can be attained in a horizontal output transformer from a discarded television set. TV repair shops may be willing to give you as many as you need, including the common transistor 2SC1308K. By interfacing a 555 and 4017 to an H.O.T. driver, you can drive up to ten H.O.T.'s and light up a spark plug tester.

Hejuco · 12th July 2008, 04:34 PM

Next questions, Is there a potentiometer that I can use to speed or slow down rate of "spin" for said lifters?

Hejuco · 12th July 2008, 04:37 PM

Please excuse my techical ignorance, but would I connect the H.O.T. directly to the 555/4017 or would I have to use the transistor you mentioned?

**Nigel Goodwin** · 12th July 2008, 06:27 PM

Quote:

Originally Posted by Hejuco

Please excuse my techical ignorance, but would I connect the H.O.T. directly to the 555/4017 or would I have to use the transistor you mentioned?

You would need a transistor, also the output from HOT's is usually 25KV, perhaps 28KV, never as high as 50KV.

yngndrw · 12th July 2008, 09:19 PM

A bit off topic, but I remember an article about this technology being used to replace computer fans.

Hejuco · 26th July 2008, 07:15 PM

So, I've aquired the High Output Transformers / Flyback Xfr. I noticed that the 2SC1308K transistors come in either a two post or three post configuration. Any ideas which of the two would be better suited? I'm guessing a three post. Remeber, and eight "cylinder" lifter is what I'm trying to power. Max voltage is 50Kv/5ma.

shokjok · 30th July 2008, 03:05 AM

The 2SC1308K is one of many H.O.T.'s available. It can be coupled with an isolation transformer driven by a TIP29, TIP41 or NTE124 transistor, for example. To give you a starting point, try my interface circuit, replacing the triacs with said components.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Title	Starter	Forum	Replies	Latest
need help with LED CHaser	impulseballer	Electronic Projects Design/Ideas/Reviews	10	16th May 2008 04:23 AM
8051 chaser & questions	Torben	Micro Controllers	0	18th April 2007 03:05 AM
mystery chaser	musthave	Electronic Projects Design/Ideas/Reviews	0	24th September 2006 11:36 PM
LED chaser with 555 timer	KChampion	Robotics Chat	4	5th April 2005 02:12 AM
Chaser LED IC Help	fiveten	Electronic Projects Design/Ideas/Reviews	1	22nd February 2005 02:17 AM

12th July 2008, 12:46 AM	(permalink)
Mikebits	When I use to work on HF transmitters, we could hold a fluorescent light bulb near the dummy load and it would light up.

12th July 2008, 05:28 AM	(permalink)
shokjok	Your suggestion is workable. 50KV can be attained in a horizontal output transformer from a discarded television set. TV repair shops may be willing to give you as many as you need, including the common transistor 2SC1308K. By interfacing a 555 and 4017 to an H.O.T. driver, you can drive up to ten H.O.T.'s and light up a spark plug tester.

12th July 2008, 04:34 PM	(permalink)
Hejuco	50kv/5ma Next questions, Is there a potentiometer that I can use to speed or slow down rate of "spin" for said lifters?

12th July 2008, 04:37 PM	(permalink)
Hejuco	Please excuse my techical ignorance, but would I connect the H.O.T. directly to the 555/4017 or would I have to use the transistor you mentioned?

12th July 2008, 09:19 PM	(permalink)
yngndrw	A bit off topic, but I remember an article about this technology being used to replace computer fans.

26th July 2008, 07:15 PM	(permalink)
Hejuco	So, I've aquired the High Output Transformers / Flyback Xfr. I noticed that the 2SC1308K transistors come in either a two post or three post configuration. Any ideas which of the two would be better suited? I'm guessing a three post. Remeber, and eight "cylinder" lifter is what I'm trying to power. Max voltage is 50Kv/5ma.