Owl Direction Circuit component list

I am listing the Maplin part numbers because the shops can be found in many towns and there is an on-line ordering service. For many items they are by no means the cheapest, so it may be worthwhile checking other companies such as CPC and Rapid Electronics to name but two.

Power Supply

Maplin. AC/AC multi-voltage set to 4.5 VAC Part number N57AT

Power Supply Connector Maplin either FT97F, FK06G or JK10L – depends on how you wish to position the socket

Transistors

Type Quantity Maplin number Component

BC550 2 UL49D Q1, Q2

Diodes

Type Quantity Maplin number Component

1N4001 2 QL73Q D1, D2

1N4148 2 QL80B D3, D4

LED

One required. Choose your colour

Colour Maplin number Component

Red WL27E

Yellow WL30H LED1

Green WL28F

Blue JA25C

Integrated Circuits

Type Quantity Maplin number Component

CD4053 1 QW36P U1

TL082 1 RA71N U2

Capacitors

Value Quantity Maplin number Component

470uF 16V 2 VH46A C1, C2

1uF 63V 2 N24CN C3, C4

Resistors

All resistors are 0.25W or greater (Maplin 0.6W range is ideal)

Value Quantity Maplin number Component

1k0 1 M1K R8

10k0 3 M10K R1, R2, R7

100k0 4 M100K R3, R4, R5, R6

Circuit Board

Maplin strip board N95CF or the stronger (and more expensive) N99CF

Accessories

I would recommend using sockets for the ICs.

Type Quantity Maplin number

16 pin 1 BL19V

8 pin 1 BL17T

Solder pins make ideal means of connecting wires to the circuit board. Maplin number FL24B for pack of 100. You’ll need up to 8.

Wire links. I use the wire cut off from the resistors after they have been soldered to the circuit board as the wire links.

Track cutter. I would recommend using the spot face cutter Maplin FL25C