Breadboard Layout Circuit Simulation Photo Of The Prototype 24-Hour Timer1) RANG

Question

Breadboard Layout Circuit Simulation Photo Of The Prototype 24-Hour Timer1) RANGE + ve? C1 Pin Approximate Range 7 30 s to 90 sec 1m to 3 min 2m to 6 min 4m to 12 min 14 8m to 20 min 13 15m to 45 min 15 30m to 90 min 1 2 h to 6 hrs 2 4h to 12 hrs 3 8 h to 24 hrs Maplin N15AW Relay Coil 270R (min D2 Q12 Q13 Q10 Q14 Q8 Q6 09 Q5 RESET 12 4 C2 369545 Omron G2E 15 R7 4k7 Range 13 D1 SETUP R3 150k R4-Adjust time R4 470k Pin Setting Pin 7 ut 110 2 Pin 7 4 6 Q7 14 Q8 13 Q932 15 Q1064 GND C3 X Transistor= BC547 Diodes =IN4148 Cmos C3 Else BC R1 547 R2 4060 10uF 100nF C3 2 |Q 13÷512: -- 3Q141024 - Ideally C3 should be non-polarized. Maplin JA75S. RS 768 728. See Text

Explanation / Answer

             In this circuit the range pi connect to PIN14 (8mins to 20mins ) for ON condition by adjustment R4 varies the up to 10mins and OFF condition of relay 23h50m to remove D1 connection which is repeat timer continuously ON and OFF 10mins cycle. By remove D1 the timer output ON in 10mins and OFF in 23h50m.

            In the circuit by connect of PIN14 you can used at PIN14 go to high i.e., 10*60 600 seconds. The setup table tell you to divide this by 16 i.e. 600/16 37.5 seconds appoxmetly 38 seconds adjust R4 so that yellow LED light up 38 seconds after power is applied ,to given output PIN14 out of 10mins      

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