The SamClock is a
digital clock apparatus fully parametric as regards it' s construction and functioning
used for many years, without operational problems, on a 24 hour basis. Certainly today
there are more compact recommendations based however the joy of the "operator' from a
certain point and after is that of being able to control all the parameter of
interesting points are :
1] A second indicator which few circuits have.
2] The possibility to add a second display
representation, on the back of the construction since it was primarily designed for
operation in a Radio studio.
3] The possibility drive external display at various
points far from the mother apparatus.
4] Visual/Sound indicator (Alarm) one minute before
the end of each hour .
5] The existence of a battery which can be recharged
6] The future possibility of adding a Wake-up alarm.
*Click on RED, to see ClockSam circuits and P.C.B images.Analysis.1]>Page 1.--Here is the Relay, which gives the orders for regulation, Hours,
Minutes, Seconds, The change speed
of regulations (X1 - X10) or Normal - High, To Zero of all the indicators (Reset)..
The orders are given by the Push Button which is found on Page 2. The commands for the
functioning are also found BCD Up Counter (IC7-9) and BCD-7segment C.C./Decoder/Driver
(IC1-6) which drive the display through the connectors SV2-7.
2] >Page 2.--The heard of the clock is found here. The
oscillator around the IC15 with Q1 crystal produces the high frequency, which then divides
for Normal or Fast functioning , with excellent results stability, if the right
temperature surroundings and are taken in to account for the crystal Q1. The section
around IC9 A-b can be omitted from most of them since it relates almost exclusively to
Radio functioning (creation of Tone 1 KHZ/1 HZ on the last minute, before the completion
of each hour [bibs]). Here is also the Main Power supply , around the IC20 and the battery
recharger [Lead 6V] around the IC21. The SV13 gives the necessary exits for the basic
Display Front Side.
3] >Page 3.--Here are the connectors SV 5-7 which lead to
the Front Display and SV 2-4 which drive the Rear Display (Optional).
4]>Page 4.--Display Front Side. The keyboard for regulating
Hour-Minutes-Seconds-Speed-Reset, are connected through the J1F with the SV1. Higher up
the Display Common Cathode 7- segment is found.
5] >Page 5.--Display
Rear Side. The display C.C. 7-segment of the back is found here if needed.
Those who are
interested can get an idea for the apparatus, by looking at the P.C.B images.
>Main board - >Display
Front - >Display Rear
reasons the prices of the materials have been omitted from the plan. Those who are
interested can send me an E-Mail, and I will send
them by E-Mail.