TV-B-Gone 360

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Probedude
 
Posts: 87
Joined: Sun Dec 23, 2007 3:16 am

TV-B-Gone 360

Post by Probedude »

Not yet completed, just etched the board. Won't have time to stuff for a couple of days (work gets in the way).

- 12 IR leds equally spaced around a 1.25 diameter PCB
- powered by a small 2 cell lipo battery pack (7.2 - 8.4V source)
- single so-8 n-ch mosfet switches the cathode of all the LED's.
- each LED has its own dropping resistor off the battery supply coming in.
- sot89 sized 5v regulator for the MCU.

I kept the 8 pin dip MCU since I already had a tube of them.

Once I get it built I need to figure out how to install it in a baseball cap without looking too dorky.

Image

caladan
 
Posts: 19
Joined: Mon Dec 17, 2007 12:16 pm

Post by caladan »

How do you connect those LEDs?
It could be more efficient to use switching regulator... or separate battery.

Probedude
 
Posts: 87
Joined: Sun Dec 23, 2007 3:16 am

Post by Probedude »

caladan wrote:How do you connect those LEDs?
It could be more efficient to use switching regulator... or separate battery.
They're radially installed around the perimeter of the PCB.

Don't need a switcher for the MCU, the current draw is so low that a linear reg. is fine, plus it's much smaller this way. The LED's are powered straight off the incoming supply, with a dropping resistor off each LED.

Probedude
 
Posts: 87
Joined: Sun Dec 23, 2007 3:16 am

Post by Probedude »

Here's the schematic for the board. Still need to stuff it (been too distracted with other projects).
:oops:

Image

blark
 
Posts: 8
Joined: Wed Aug 14, 2013 2:32 pm

Re:

Post by blark »

Probedude wrote:Here's the schematic for the board. Still need to stuff it (been too distracted with other projects).
:oops:

Image
Any chance you could repost this image -- maybe somewhere like imgur so we can see it?

Thanks

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