Item# ULN2002
Array;7-Ch. Darlington; 50V; 13 V (Max.);500mA Collector
IC, LM3909 , Led Flasher SKU: LM3909 Price: $5.99
IC, XR2206 ,Function Generator SKU: XR2206 Price: $8.99
Analog Devices, IC, AD590JH , Two-Terminal IC 1.2 V Reference SKU: AD590JH Price: $6.00