samclock ringer

�� SamClock RINGER ,�� SamClock. �� , �� RL1. � �� , �� clock ,�� , �� , �� , �� . �� , �� , �� -��, �� , �� , �� . �� .� �� , �� , �� .

�� ;

� �� , �� IC1-6 [4511], �� IC1-6 [4028] �� , �� .�� IC1-6 [4028-BCD to decimal Decoder ] �� DIL . �� 0 �� 9, �� , �� . �� [��], �� , �� . �� .�. �� 12: 05': 46", �� S7[��], �� , �� DIL , �� : S1[1], S2[2], S3[0], S4[5], S6[6]. �� DISPLAY �� [�] �� IC1-6, �� .

�� [�] �� IC8b, �� [�] �� 1sec, �� Q1 �� C8c/9 ,�� . � �� IC8c/10 �� [L] �� [H] , �� Q 1-3, �� : �� LD1 ��, buzzer �� RL1 �� , �� . �� IC8b �� [�] �� 1'' �� [L], �� IC8c kai IC8d �� . �� S7 [OFF], �� Ringer �� , �� LD1��, �� RL1 ��, �� Buzzer �� , �� . �� S1, �� C3. �� TR1 �� ,. � �� , � �� .

The SamClock RINGER, constitutes natural extension of digital clock SamClock. With this circuit we acquire a programmed exit ringer or excitation of external units, via the RL1. The programming does not remain classically, in order that make most clock, in the hour and in minutes, but advance and in the seconds, acquiring thus bigger precision, where they are this desirable. And in this circuit is maintained the philosophy of distinguishable materials, acquiring thus the possibility, of adding or of removing possibilities, adapting him, in the needs that we have, as in the basic unit. Thus what it does not need exit of seconds, relay or buzzer, it very well can him pass and suppress the proportional unit..

How it works?

The control becomes, connecting the entries of IC1-6 [ 4511 ], with the entries of IC1-6 [ 4028 ] of basic unit, as it appears and in the circuit. The exits of IC1-6 [ 4028-BCD to decimal decoder ] they are connected in switches DIL. In each switch correspond also a number from 0 until the 9, as it appears in the numbers, that are found except frame of switches. When the switch is closed [ ON ], then the logic level of exit that his correspond it is transmitted in the corresponding gate, that follow. If we want , to have excitation of circuit in time 12: 05 ': 46 ", we close switch S7 [ON ], in order to is supplied the circuit with voltage and places switches DIL, in the places: S1[1 ], S2[2 ], S3[0 ], S4[5 ], S6[6 ]. When the time reache and the DISPLAY they show the above hour then we will have logic high level [ H ] in the corresponding exits of the IC1-6, as it appears in the below table.

	HOURS		MINUTES		SECONDS
Display	1	2	0	5	4	6
Out pin	IC1/14	IC2/2	IC3/3	IC4/6	IC5/4	IC6/7
Switch	S1/1	S2/2	S3/0	S4/5	S5/4	S6/6

All the exits become [ H ] and the exit of IC8b, become [ H ], for 1sec, drive the Q1 that is conductible leading the entry IC8c/9, to the ground. His situation change also exit of IC8c/10, from [ L ] become and remain [ H ], it leads Q 1-3, that turn on: the LD1 turns on, buzzer sound, also relay RL1 close, driving certain external unit. When that exit of IC8b becomes [ H] for 1 second and afterward become [ L ], this is enough in order to excite the IC8c and IC8d and it change situation. If we open the switch S7 [ OFF ], then ringer closed, the LD1 is turn off, the RL1 open, the buzzer stop it sound, waiting for the next circle. If we close again the S1, we have excitation reason of C3. With the TR1 we regulate the level of ringing. the supply of circuit it become from the supply of basic clock, the consumption it depend from the relay that we will use.