I/ OBJECTIVES After completing this experiment, you should be able to: - Implement the decade counters, dual decade counters and presettable 4-bit binary up/down counter - Design programmable frequency division. - Understand the operations of some IC counters. II/ COMPONENTS REQUIRED 1. Main board and sub board of Digital Logic System Kit. 2. IC 74LS90 : Decade Counters 3. IC 74LS193: Presettable 4-bit binary up/down counter 4. IC 74LS390: Dual 4-Bit Decade Counter