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Object counters or product counters are important applications used in industries shopping malls etc they count objects or products automatically and so reduce human efforts in this project we are going to design a simple object counter circuit without using any microcontroller. State diagram of decade counter the state diagram of decade counter is given below if we observe the decade counter circuit diagram there are four stages in it in which each stage has single flip flop in it. Operation of ring counter initially all the flip flops in ring counter are reset to 0 by applying clear signal before applying the clock pulse we apply the preset pulse to the flip flops which assigns the value 1 to the ring counter circuit. This is a low cost 150 watt amplifier circuit with diagram and schematic design using two darlington power transistors tip 142 and tip 147 this amplifier circuit can deliver 150 watt rms. Here is a simple 4026 manual digital counter circuit with reset and pause this counter circuit applicable for order to count certain events such as people counter product counter etc circuit uses digital counter ic 4026 and 7 segment display