IR relay circuit malfunctions when touched

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i have made circuit once before , working fine in room , when have built new 1 again using same circuit, malfunctions when touched bare hands. on touching circuit, relays start triggering automatically in random manner. when happened, 10uf capacitor solves problem when connected between atmega328p reset pin , ground. please help. circuit board's pic attached below.

where bypass capacitors? reset pullup resistor? aref bypass ground? in fact, of required components required allow chip operate correctly?


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