Bill E Bodge
UNITED KINGDOM • + Follow
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Description
Blip! - The LED flasher.
Micropower LED flasher
Powered from 3V (e.g. CR2032 or other 3V coin cell) via J1 (square pin is pin 1 - positive).
LED is through hole (for best results use a low current led e.g. Vishay TLLK4401).
Square pin of LED1 is anode.
Flash duty cycle is 10.5ms/1.4s = 0.75%
Power consumption estimate calculations given in schematic.
Resistors ideally should be 1% although BAW56 double diode does contribute to imprecise on-time.
Schematic is in svg format file at Google Drive link.
Mar 21,2019
1,254 views
Blip! - The LED flasher.
2 Layers PCB 10 x 10 mm FR-4, 0.8 mm, 1, HASL with lead, Green Solder Mask, White silkscreen
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Published: Mar 21,2019
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