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Camera Control. ELM307 Datasheet

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Camera Control. ELM307 Datasheet






ELM307 Control. Datasheet pdf. Equivalent




ELM307 Control. Datasheet pdf. Equivalent





Part

ELM307

Description

Camera Control



Feature


ELM307 Camera Control Description The EL M307 is a retriggerable one-shot circui t that has been designed for electronic ally controlling the shutter of a film or digital still camera. The circuit pr ovides a variable pulse width timer, a variable delay reset timer, power contr ol, and an LED status drive all in an 8 pin package. In operation, a monitored signal (alarm con.
Manufacture

ELM Electronics

Datasheet
Download ELM307 Datasheet


ELM Electronics ELM307

ELM307; tact, audio signal, oscillator signal, e tc.) is applied to the circuit’s Trig ger input. A low level at this input im mediately causes an output at the Camer a pin (controlling the shutter) that la sts for the duration set by PW. Further triggering is inhibited until an www.D ataSheet4U.com additional period (set b y Delay) passes, allowing time for the film to advance or f.


ELM Electronics ELM307

or the digital image to be stored. To he lp with setup, the circuit has a test m ode in which the Camera output is block ed, and the LED is instead energized. T oggling between the test mode and the r un mode is accomplished with the single pushbutton input, as is the power on a nd off. Features • Low power CMOS de sign - typically 1mA at 5V • No exter nal timing elements re.


ELM Electronics ELM307

quired • Test mode assists with setup • Single pushbutton control • Auto power off saves batteries • LED outpu t shows status • High current drive o utputs - up to 25mA Connection Diagram PDIP and SOIC (top view) VDD Delay 1 2 3 4 8 7 6 5 VSS Camera LED Trigger Applications • Security camera cont rol • Candid shots of animals or peop le • Time lapse photography • Re.

Part

ELM307

Description

Camera Control



Feature


ELM307 Camera Control Description The EL M307 is a retriggerable one-shot circui t that has been designed for electronic ally controlling the shutter of a film or digital still camera. The circuit pr ovides a variable pulse width timer, a variable delay reset timer, power contr ol, and an LED status drive all in an 8 pin package. In operation, a monitored signal (alarm con.
Manufacture

ELM Electronics

Datasheet
Download ELM307 Datasheet




 ELM307
ELM307
Camera Control
Description
The ELM307 is a retriggerable one-shot circuit
that has been designed for electronically controlling
the shutter of a film or digital still camera. The circuit
provides a variable pulse width timer, a variable
delay reset timer, power control, and an LED status
drive all in an 8 pin package.
In operation, a monitored signal (alarm contact,
audio signal, oscillator signal, etc.) is applied to the
circuit’s Trigger input. A low level at this input
immediately causes an output at the Camera pin
(controlling the shutter) that lasts for the duration set
www.DataSheebty4UP.cWo.mFurther triggering is inhibited until an
additional period (set by Delay) passes, allowing
time for the film to advance or for the digital image to
be stored.
To help with setup, the circuit has a test mode in
which the Camera output is blocked, and the LED is
instead energized. Toggling between the test mode
and the run mode is accomplished with the single
pushbutton input, as is the power on and off.
Applications
• Security camera control
• Candid shots of animals or people
• Time lapse photography
• Remote triggering of cameras
Features
• Low power CMOS design - typically 1mA at 5V
• No external timing elements required
• Test mode assists with setup
• Single pushbutton control
• Auto power off saves batteries
• LED output shows status
• High current drive outputs - up to 25mA
Connection Diagram
PDIP and SOIC
(top view)
VDD 1
Delay 2
PW 3
PB 4
8 VSS
7 Camera
6 LED
5 Trigger
Block Diagram
Trigger 5
VDD
PB 4
Delay 2
Delay
Timer
Control
Logic
PW 3
Pulse
Generator
LED
Logic
7 Camera
6 LED
ELM307DSA
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
1 of 4




 ELM307
ELM307
Pin Descriptions
VDD (pin 1)
This pin is the positive supply pin, and should
always be the most positive point in the circuit.
Internal circuitry connected to this pin is used to
provide power on reset of the microprocessor, so
an external reset signal is not required. Refer to the
Electrical Characteristics section for further
information.
Delay (pin 2)
The logic level at this input pin determines the
minimum time between Camera outputs. A high
level sets a nominal delay of 5 seconds while a low
www.DataSheelte4vUe.lcgoimves 1/2 of a second. This delay is provided
to ensure that the camera has time to prepare for
the next picture, before another cycle is allowed.
PW (pin 3)
The digital level at this pin sets the pulse width of
the output at Camera (pin 7). When at a logic low
level, the time will nominally be 1/4 of a second,
while a high level provides 1 second.
PB (pin 4)
This input is to be connected to a momentary action
spst pushbutton switch. Holding the switch closed
for more than 5 seconds will cause the power to
toggle on (if off), or off (if presently on). If the switch
is released after 2 seconds, but before 4 seconds
pass, the mode will toggle between run and test.
Power up is always to the test mode.
While the switch is being pressed, the LED output
will pulse briefly every second, to assist in counting
time. Once a command is acknowledged, a long
LED pulse will be provided so that you know a
change is to occur.
Trigger (pin 5)
A low level at this input initiates one cycle of circuit
operation. The use of a schmitt trigger on the input
means there are no restrictions on the rise or fall
time of the waveform.
If no trigger pulse occurs after 8 minutes in the test
mode or 32 minutes in the run mode, the circuit will
automatically power itself off.
LED (pin 6)
This output is periodically driven to a high level to
show the various states. If in the test mode, LED
will output a double pulse every 4 seconds, while in
the run mode, a single output occurs every 8
seconds. A Camera output will always blank the
LED output, so the LED cannot affect the picture.
Camera (pin 7)
This output is used to control the camera’s shutter.
Usually a transistor provides the actual interface
between the camera and the ELM307 (see the
Example Applications).
VSS (pin 8)
Circuit common is connected to this pin. This is the
most negative point in the circuit.
Ordering Information
These integrated circuits are available in either the 300 mil plastic DIP format, or in the 200 mil SOIC surface
mount type of package. To order, add the appropriate suffix to the part number:
300 mil Plastic DIP............................... ELM307P
200 mil SOIC..................................... ELM307SM
All rights reserved. Copyright ©2001 Elm Electronics.
Every effort is made to verify the accuracy of information provided in this document, but no representation or warranty can be
given and no liability assumed by Elm Electronics with respect to the accuracy and/or use of any products or information
described in this document. Elm Electronics will not be responsible for any patent infringements arising from the use of these
products or information, and does not authorize or warrant the use of any Elm Electronics product in life support devices and/or
systems. Elm Electronics reserves the right to make changes to the device(s) described in this document in order to improve
reliability, function, or design.
ELM307DSA
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
2 of 4




 ELM307
ELM307
Absolute Maximum Ratings
Storage Temperature....................... -65°C to +150°C
Ambient Temperature with
Power Applied....................................-40°C to +85°C
Voltage on VDD with respect to VSS............ 0 to +7.5V
Voltage on any other pin with
respect to VSS........................... -0.6V to (VDD + 0.6V)
Note:
Stresses beyond those listed here will likely damage
the device. These values are given as a design
guideline only. The ability to operate to these levels
is neither inferred nor recommended.
Electrical Characteristics
All values are for operation at 25°C and a 5V supply, unless otherwise noted. For further information, refer to note 1 below.
Characteristic
www.DataSheet4U.com
Minimum Typical Maximum Units
Conditions
Supply voltage, VDD
3.0 5.0 5.5 V
VDD rate of rise
0.05
V/ms see note 2
Average supply current, IDD
Input low voltage
1.0 2.4 mA see note 3
VSS
0.15 VDD
V
Input high voltage
0.85 VDD
VDD
V
Internal pullup resistance (pin 4)
300
500
600 Ksee note 4
Output low voltage
0.6 V Current (sink) = 8.7mA
Output high voltage
VDD - 0.7
V Current (source) = 5.4mA
LED Current
8 mA no resistor, VDD = 3V
Output PW
pin 3 = L
pin 3 = H
0.26
1.05
sec see note 4
sec ”
Delay after PW
pin 2 = L
pin 2 = H
0.52
5.2
sec see note 4
sec ”
Notes:
1. This integrated circuit is produced with a Microchip Technology Inc.’s PIC12C5XX as the core embedded
microcontroller. For further device specifications, and possibly clarification of those given, please refer to the
appropriate Microchip documentation.
2. This spec must be met in order to ensure that a correct power on reset occurs. It is quite easily achieved
using most common types of supplies, but may be violated if one uses a slowly varying supply voltage, as
may be obtained through direct connection to solar cells, or some charge pump circuits.
3. Active current. When powered down, requirements are reduced to much less than 1µA.
4. All internal resistances and oscillators are affected to some extent by both temperature and supply voltage
variations. Timers slow down as voltages are reduced, and speed up as temperatures decrease. The times
shown above will typically be 5% longer for circuits operated at room temperature and a 3V supply.
ELM307DSA
Elm Electronics – Circuits for the Hobbyist
< http://www.elmelectronics.com/ >
3 of 4






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