Need some light in a dark road while walking your dog at night? Here is a cool instructable, a flashing LED dog harness with blinking-control knob. You can change the pace of the flashing light by turning the knob. Show off your dog with this flashing LED dog harness.
Step 1: A Preview of the Flashing LED Dog Harness
Step 2: The Battery Pack
I used 3 AA batteries as my voltage source and a small pouch to hold those batteries. Btw i got my battery holder from an old toy and from an old alarm clock.
Step 3: The 555 Timer Circuit
Just follow the instructions at the vid for more info in making the 555 timer circuit.
*** I used a film canister to hold the circuit and I cut it half for it to fit in the pouch.
Step 4: The LED PCB and the Overall Circuit
*** I used the wires from an old cellphone charger as my connectors..
*** You can use spst switch for the switch...