This circuit contains two light-emitting diodes which flash alternately on and off. The rate of flashing is determined by the 555 timer integrated circuit and its associated components. Adjusting the variable resistor with a small screwdriver (not supplied) alters the rate of flashing.
Different versions of this kit are available:
the STANDARD kit contains one l.e.d. of each colour (green and red)
ALTERNATIVE kits contain two l.e.d.s of a single colour (either blue or green or red or white).
Please state "STANDARD" or the COLOUR you require in the "note to seller" box at the checkout.
Watch the circuit working on the Irby Electronics YouTube channel.
When this circuit was tested, the Duracell Plus Power 9 volt battery was still producing a good light output after 30 hours of continuous use.
The circuit is made on track board (approx. 6 cm x 2 cm) and requires 1 x PP3 battery (not supplied). Precision soldering is ESSENTIAL for this kit so that solder on one track is not splashed across to an adjacent copper track.
These tools are needed to make this kit (not supplied):
small pliers for bending component leads and link wire,
small wire cutters for cutting component leads and link wire,
3 mm drill bit or sharp craft knife for breaking the copper track,
small, low power soldering iron, e.g. 15 watt, 18 watt or 25 watt.
Please read the safety warning in the About Irby Electronics section before ordering a kit.
Shipping & delivery
This item will be posted to you by Irby Electronics within 3 days of receiving payment.
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You have 14 days, from receipt, to notify the seller if you wish to cancel your order or exchange an item.
Unless faulty, the following types of items are non-refundable: items that are personalised, bespoke or made-to-order to your specific requirements; items which deteriorate quickly (e.g. food), personal items sold with a hygiene seal (cosmetics, underwear) in instances where the seal is broken.