How can I get a simple timed LED flash?
I am tired of stepping on my cat's tail in the middle of the night. I want to rig a simple LED that will flash about once every 10 - 15 seconds and run off a hearing-aid sized battery. The circuit should be small enough to weave/sew into the cat's collar.
I am somewhat familiar with RC circuits but am dealing with limited space and voltage. I just want a beacon that will flash and let me know where the cat is at night.
Just looking for a simple circuit diagram.
Get plug in dark activated nightlights and install them where the cat will be, or you walk to to where you go at nights.
The hearing aid sized or lithium coin batteries, might last a few days, so you have to keep changing them.
A look at what is currently available on eBay
 woven sewing basket in nice shape large in size US $14.00 
|
 100 SMALL White Woven sewing Size Tags Labels.·:*¨♥¨*: US $5.99
|
 50pcs Woven Sewing Clothing Size Labels Tags Package US $5.50
|
 100 LARGE White Woven sewing Size Tags Labels.·:*¨♥¨*: US $5.99
|
 1000 Woven Clothing Sewing Size Labels Tags Tabs S-M-L US $19.98
|
 100 XL WHITE Woven sewing Size Tags Labels.·:*¨♥¨*: US $5.99
|
 50pcs Woven Sewing Black Size Labels Tags Package US $5.50
|
 100 WOVEN SEWING LABELS, CLOTHING SIZE TAGS - MEDIUM US $7.99
|
 450 Woven Sewing Clothing Size Labels Petite S-M-L-XL US $6.98
|
 100 XXL Black Woven sewing Size Tags Labels :*¨♥¨*: US $5.99
|
 100 XXXL Black Woven sewing Size Tags Labels :*¨♥¨*: US $5.99
|
 100 Size 48 White Woven sewing Tags Labels.·:*¨♥¨*: US $5.99
|
 240 WOVEN SEWING CLOTHING LABELS, SIZE TAGS - S, M, L US $14.99
|
 KWIK SEW #2586 GIRLS LW WOVEN JACKETS UNCUT SZ 8-14 US $7.99
|
 100 9 months WHITE Woven sewing Size Tags Labels*¨♥¨*: US $5.99
|
Items recently purchased from this site
999 WOVEN CLOTHING SEWING LABELS, SIZE TAGS 2T, 3T, 4T, 980 WOVEN CLOTHING SEWING LABELS, SIZE 1 3 5 7 9 11 13, 500 SEWING WOVEN SIZE TAGS LABELS XL 2XL 3XL BLACK, Large Starter Pack Woven Sew In Clothing Size Labels, 1000 Woven Clothing Sewing Size Labels Tags Tabs S-M-L, 800 Woven Clothing Sewing Size Labels Tags Tab S-M-L-XL, 240 WOVEN SEWING CLOTHING LABELS, SIZE TAGS 2T 3T 4T, 240 SEWING WOVEN SIZE TAGS LABELS XL 2XL 3XL BLACK, 245 WOVEN CLOTHING SEWING LABELS, SIZE 1 3 5 7 9 11 13, 250 WOVEN CLOTHING SEWING LABELS, SIZE TAGS 100% RAYON, 500 woven label Size Tag sewing clothing labels, 240 WOVEN SEWING CLOTHING LABELS, SIZE TAGS - S, M, L, 250 WOVEN CLOTHING SEWING LABELS Size XS S M L XL - WHITE , woven sewing basket in nice shape large in size, VINTAGE WOVEN SEWING BASKET WITH LID NATURAL MEDIUM SIZE NICE CONDITION, 300 Woven Clothing Sewing Size Labels Tags 1X-2X-3X, KWIK SEW Pattern sz XS S M L XL Vest Pullon Pants Shorts Woven Fabric NEW Uncut, 400 Woven Sewing Clothing Size Labels Petite S-M-L-XL, 100 WOVEN CLOTHING LABELS, SIZE TAG SEWING 100% COTTON, 100 SEWING WOVEN SIZE TAGS LABELS XL 2XL 3XL BLACK, 100 WOVEN GARMENT SEWING PATCH, SIZE TAGS 100% COTTON, KWIK SEW #1921 SZ XS-XL MISSES BLOUSE UC WOVEN FABRIC, 100 WOVEN CLOTHING SEWING LABELS, SIZE TAGS 100% COTTON, LOT 100 WOVEN CLOTHING SEW LABELS, SIZE TAGS 100% RAYON, 100 WOVEN CLOTHING SEWING LABELS, SIZE TAGS 100% RAYON, 100 WOVEN CLOTHING SEWING LABELS, SIZE TAGE, SIZE P, 100 WOVEN SEWING LABELS, CLOTHING SIZE TAGS - MEDIUM, 100 WOVEN SEWING LABELS, CLOTHING SIZE TAGS - SMALL, 100 WOVEN SEWING LABELS, CLOTHING SIZE TAGS - LARGE, KWIK SEW #2586 GIRLS LW WOVEN JACKETS UNCUT SZ 8-14, 100 Woven Clothing Sewing Size Labels Tags Tab 1X-2X-3X, 100 Blue Woven Sewing Clothing Size Labels Tags M-L-XL, 100 White Woven Sewing Clothing Size Labels Tag S-M-L, 100 Black Woven Sewing Clothing Size Labels Tag S-M-L, 800 Woven Sewing Clothing Size Labels Petite S-M-L-XL, PURRFECTION SEWING PATTERN *WOVEN PATCHWORK* JACKET 1017 SZ XS-5X Dana Marie, 450 Woven Sewing Clothing Size Labels Petite S-M-L-XL, 80pcs White Woven Sewing Size Label Tags Package, 100 XS White Woven sewing Size Tags Labels.·:*¨♥¨*:, 50 SEWING WOVEN SIZE TAGS LABELS XL 2XL 3XL BLACK, 100 Size 32 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 34 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 6 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 XS Black Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 XXXL WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 4X WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 5X WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 6X WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 Size 2 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 2T ♥ White Woven sewing Tags Labels.·:*¨♥¨*:, 200 Woven Label Size Tag number tag garments tag sewing size tag., 50 WOVEN CLOTHING SEWING LABELS, SIZE TAGS 100% COTTON, 100 "S" Black Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 XL Black Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 Size 18 White Woven sewing Tags Labels.·:*¨♥¨*:, 100~ 12 months WHITE Woven sewing Size Tags Labels*¨♥¨*, LOT 50 WOVEN CLOTHING SEW LABELS, SIZE TAGS 100% RAYON, 100 Size 3/4 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 9/10 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 2X WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 3X WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 3 months WHITE Woven sewing Size Tags Labels*¨♥¨*:, 100 9 months WHITE Woven sewing Size Tags Labels*¨♥¨*:, 100 18 months WHITE Woven sewing Size Tags Labels*¨♥¨*, 100 24 months WHITE Woven sewing Size Tags Labels*¨♥¨*, 100 SMALL White Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 XL WHITE Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 LARGE White Woven sewing Size Tags Labels.·:*¨♥¨*:, 100 Size 3 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 11/12 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 13/14 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 14 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 16 White Woven sewing Tags Labels.·:*¨♥¨*:, 100 Size 20 White Woven sewing Tags Labels.·:*¨♥¨*:,