This kit contains seven different timing modes using only
ONE IC and some support components on a singlesided
PCB. This is a lot less than many single-mode
traditional timers. The timing modes and delay ranges
are selected by on-board DIP switches. Simply select
the time delay you want and thats it - no adjustment
required.
The kit is constructed on a single-sided PCB measuring
96 x 48 mm (3 3/4 x 1 7/8). The kit requires a 9-to-
12V DC power supply. A 12VDC wall adaptor rated at
300mA is suitable.
TIMER MODES
Mode 1 - Instant On, Delayed Off, Level triggered
Trigger signal operates the relay and starts the timing
cycle. The relay remains operated for the selected
delay time then releases. Loss of trigger signal causes
the timing cycle to stop immediately and the relay to
release. The timer will then be ready for another trigger
signal.
Mode 2 - Instant On, Delayed Off, Edge triggered
Same as Mode 0 except that loss of trigger signal does
not affect the timing cycle. However, applying another
trigger signal before the end of the timing cycle will
restart the timer from zero. The effect is a retriggerable
timer.
Mode 3 - Delayed On
Trigger signal starts the timing cycle. At the end of the
delay time the relay operates and stays operated until
the trigger signal is removed or the timer is reset. Loss
of trigger signal during the delay time aborts the timing
cycle.
Mode 4 - Instant On and Hold, Delayed Off
Trigger signal operates the relay but does not start the
timing cycle. The relays remains operated while the
trigger signal is present. Loss of trigger signal starts
timing cycle. Relay releases at end of delay time.
Mode 5 - Toggling
Trigger signal operates the relay for selected delay
time. The relay then releases for the same delay time.
This cycle continues until loss of trigger signal or reset.
Mode 6 - Instant On, Delayed Off, with Pause
Similar to Mode 0 a trigger signal operates the relay
and starts the timing cycle. However, loss of trigger
signal causes the timing cycle to pause the relay
remains operated. Re-applying the trigger signal will
re-start the delay time from where it was stopped. At
the end of the delay time the relay releases.
Mode 7 Delayed ON with Pause
Trigger signal starts the timing cycle. At the end of the
delay time the relay operates for 2 seconds and the
timing cycle starts again. Loss of trigger signal causes
the timing cycle to pause. Re-applying the trigger
signal re-starts the timing cycle from where it was
stopped. Reset is the only way to exit this mode.
Mode 8 Unused
