ELM303 Datasheet, PDF (1/5 Pages) ELM Electronics – Camcorder Time-Lapse Control

ELM303
Camcorder Time–Lapse Control
Description
The ELM303 is a specialized circuit for creating
time-lapse videos on suitably equipped camcorders.
The camcorder to be controlled must have a Control
L (LANC) port, and also be capable of responding to
power control signals. This is usually only available
with the mini DIN connectors, and not the 2.5mm
stereo plug interfaces.
The ELM303 provides intervals of 10 minutes to
24 hours between recordings, without requiring any
external timing components. Recording durations of
either 1 second or 10 seconds is also selectable.
One additional feature allows manually triggered
recordings to be initiated when all three interval
inputs are at a low level. Recording will begin
immediately and will continue as long as the inputs
remain low. This combination is fully debounced,
simplifying the interface to mechanical switches.
The ELM303 has been ‘hard–coded’ to send the
Control L hex command ‘33’ (word 1) to device ‘18’
(word 0), and cannot be modified. Be sure to verify
that these are appropriate for your camera before
committing to any designs.
Applications
• Time-lapse video recording
• Security monitoring
• Long period time delay circuits
Block Diagram
D0 ⁵
Control L
Driver
Programmable
Delay
Control
I2 2
VDD
I1 3
I0 4
200ms Pulse
Generator
Features
• Delays of 10 minutes to 24 hours with no external
timing components
• Recording durations of 1 or 10 seconds
• Low power CMOS design - typically 1mA at 5V
• Security feature allows on demand recording
• Initial recording after 1 minute to verify system
operation and connections
• Pulsed power output to control camera power
Connection Diagram
PDIP and SOIC
(top view)
VDD 1
I2 2
I1 3
I0 4
8 VSS
7 LANC
6 Power
5 D0
VDD
7 LANC
VSS
VDD
6 Power
VSS
I2 I1 I0 Interval
L L L continuous
L L H 10 min
L H L 30 min
L H H 60 min
HL L
3 hrs
HLH
6 hrs
H H L 12 hrs
H H H 24 hrs
Table 1
ELM303DSA
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
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