ELM Electronics - Around the Home

This product group caters to needs around the home. Security, automobiles, audio, video, and experiments with home automation all fall into this group.

ELM303 - Camcorder Time-Lapse Control
ELM304 - NTSC Video Generator
ELM307 - Camera Control
ELM310 - Stepper Motor Controller
ELM311 - Stepper Motor Controller
ELM312 - Stepper Motor Controller
ELM313 - Stepper Motor Controller
ELM320 - OBD (PWM) to RS232 Interpreter
ELM322 - OBD (VPW) to RS232 Interpreter
ELM323 - OBD (ISO) to RS232 Interpreter
ELM327 - OBD to RS232 Interpreter
ELM328 - OBD Device Identifier Test IC
ELM331 - Solid State Thermostat
ELM334 - Garage Doorman
ELM337 - Light Switch
ELM339 - Infrared Remote Control
ELM341 - Low Power Thermostat
ELM365 - Security System Controller
ELM380 - Battery Charger Timer
ELM381 - 60Hz Long Interval Counter
ELM382 - 50Hz Long Interval Counter
ELM460 - Impossible Oscillator
ELM624 - Control L (LANC) to RS232 Interpreter

ELM303 - Camcorder Time-Lapse Control		Data Sheet
	This circuit periodically powers up a Camcorder, instructs it to record either 1 or 10 seconds of video, then powers it down again. Programmable for delays of 10 minutes to 24 hours. Requires a camera with a Control L (LANC) port and a power control pin. Handy for those Science Fair projects, or for security surveillance.
	Available in: 8-pin PDIP $8.50 CDN, 8-pin SOIC $10.00 CDN

ELM304 - NTSC Video Generator		Data Sheet
	Ever want to use a stereo VCR to record only audio, but found that it needed some video before it would record anything? This handy circuit provides a blank raster that is perfect for these applications. Can also produce a test pattern of four gray-scale bars. Output is fully interlaced, standard 60Hz field/30Hz frame rate.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM307 - Camera Control		Data Sheet
	Trigger your still (film or digital) camera from various sources including lightning (using an AM radio), a light beam, an alarm circuit or a momentary switch. A single pushbutton is used for power on/off as well as mode switching, keeping the interface simple.
	Available in: 8-pin PDIP $8.50 CDN, 8-pin SOIC $10.00 CDN

ELM624 - Control L (LANC) to RS232 Interpreter		Data Sheet
	Control L or LANC is a standard interface for controlling audio and video devices. It is similar in some ways to RS232, but not enough to allow direct connection to your computer. By using the ELM624, the peculiarities of the interface are translated for you, allowing direct control and monitoring of your favourite A/V machines.
	Available in: 8-pin PDIP $14.50 CDN, 8-pin SOIC $16.50 CDN
	Be sure to visit Eric Cairon's 'ritonworld' web site for some great construction plans and software for use with this chip. This link goes directly to the English version of the site. Nigel Ealand has used Eric's circuit board, and created a Visual Basic interface to interact with it. As well as offering a free interface program, he has posted the source code for download - be sure to visit his 'Ealing Sub-Aqua Club' site. For those that don't mind paying for a solution, one source is Applied Logic Engineering. They offer bare boards, complete boards, and software, all for a reasonable price.

ELM310 - Stepper Motor Controller		Data Sheet
	One of the messiest parts of getting started with stepper motors is creating the up/ down counters to drive the motor phases. This chip does all of that work for you, so that all you have to supply is a direction and a step input. The ELM310 provides dual modes of operation, easily switching between half-stepping and full-stepping modes, while also providing very high speed bidirectional operation.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM311 - Stepper Motor Controller		Data Sheet
	This IC is similar to the ELM310, but only supports the single phase full-stepping mode of operation. This is useful if you only plan to use one mode.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM312 - Stepper Motor Controller		Data Sheet
	This IC is like to the ELM310 as well, but only supports the half-stepping mode of operation. Again, this is useful if you only plan to use the one mode.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM313 - Stepper Motor Controller		Data Sheet
	This chip is almost the same as the ELM311, operating only in the full-step mode, but it always energizes two phases at a time in order to produce more motor torque.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

The following four devices are for use with vehicles that have an OBD or On Board Diagnostics port. This port is required on any 1996 or newer North American vehicle, and is used to obtain 'trouble code' information, as well as other things. For more information, see our Auto Info pages.

Often, we are asked if we can provide circuit boards, J1962 connectors, or more user-friendly software to use with these auto ICs. Unfortunately we only sell the ICs - but have you tried the people at ScanTool.net? They offer all of the above, and their prices seem quite reasonable. Their site is http://www.ScanTool.net

ELM320 - OBD (PWM) to RS232 Interpreter Data Sheet

320 The ELM320 allows you to talk to your 41.6KHz J1850 PWM OBD (On Board Diagnostics) equipped vehicle through a standard RS232 serial connection, using only simple ASCII commands. This updated version remains just as easy to use, but is now completely programmable, allowing even more control, and of course possibilities.
As before, the user need only issue the desired commands - the data formatting, error checking, bus arbitration, etc. is all handled by the ELM320. If you presently use one of our v1.x ICs, you will be pleased to know that this version (v2.0) is pin-compatible with the old (the only difference at power-up is that linefeeds are now on by default). Simply unplug the old and plug in the new.
This IC only supports the 41.6KHz J1850 PWM data format which is typically used in Ford Motor Company vehicles. If you have a different vehicle, please refer to our ELM322 and ELM323 products.

Available in: 8-pin PDIP $16.50 CDN, 8-pin SOIC $18.50 CDN

ELM322 - OBD (VPW) to RS232 Interpreter Data Sheet

322 Similar to the ELM320, and also completely revised, the ELM322 is for connecting to an OBDII equipped vehicle which uses the 10.4KHz J1850 VPW format. This standard is typically used in General Motors Corporation and some DaimlerChrysler vehicles. The user need only issue the desired commands through an RS232 serial connection and the data formatting, error checking, bus arbitration, etc. on the vehicle side is all taken care of by the ELM322. This allows experimenters to inexpensively create their own 'scan tool'. If you presently use one of our v1.x ICs, you will be pleased to know that this version (v2.0) is pin-compatible with the old, so you can simply replace your IC if you want to upgrade.

Available in: 8-pin PDIP $16.50 CDN, 8-pin SOIC $18.50 CDN

ELM323 - OBD (ISO) to RS232 Interpreter Data Sheet

323 The ELM323 completes our trio of OBDII ICs, allowing you to talk to your ISO 9141-2 or ISO 14230-4 standard OBDII equipped vehicle using an RS232 serial connection. It transparently converts between a 10.4KHz ISO data stream and standard ASCII characters, allowing trouble codes and operating parameters to be easily retrieved without the need for special software. No knowledge of data formatting, error checking, bus initiation etc. is needed either, as the ELM323 handles all of it for you.
The present version of the ELM323 (v2.0) provides several programmable features that the previous versions did not offer. It now allows programmable header bytes, adjustable timeouts, the ability to report in the packed data mode, and offers a special monitoring mode as well. This is in addition to all of the capabilities that the v1.x ICs offered - the full seven byte command structure, two line (K and L) initiation, software selectable linefeeds and character echoing, and the visual feedback provided by the four LED outputs.
If you currently use one of our v1.x ICs, you will be pleased to know that this version (v2.0) is pin-compatible with the old, so you can simply replace your present IC with one of these, and immediately begin enjoying these new features.

Available in: 14-pin PDIP $17.50 CDN, 14-pin SOIC $19.50 CDN

ELM327 - OBD to RS232 Interpreter Data Sheet

327 We've improved our best OBD Interpreter, so now it's even better!
The new ELM327 v1.3 IC has taken the proven v1.2, added more error monitoring and recovery, added several more AT commands, has improved the CAN printing, and has added a few features that many of you have been asking for. To name just a few of the new features, you can now:

set the maximum number of responses to obtain

remove spaces from ECU responses (to speed data transmission)

store a unique identifier in EEPROM

set the CAN mask and filter with one command

easily switch between variable and fixed CAN message lengths

send CAN remote frames (RTRs)

The IC has been well-tested to date, with some very favourable responses. We think that you will be pleased as well. Download either the 'QuickSheet' (a 6 page summary), or the full (59 page) Data Sheet for a more complete description of the new ELM327.

The new ELM327 still converts OBDII data (ISO 15765-4 CAN, SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 and SAE J1939) for you - we've just made it better, with no increase in the price!
We are currently shipping version 1.3 of this IC.

QuickSheet

Available in: 28-pin PDIP $32.50 CDN, 28-pin SOIC $32.50 CDN

ELM328 - OBD Device Identifier Test IC Data Sheet

327 The ELM328 IC is electrically identical to the ELM327 except that it offers one new AT command which can be used to reset the @2 Device Identifier lock. This provides code developers with a means to repeatedly test code which writes to the @2 device identifier, without requiring a new IC each time.
Note that the ELM328 supports all of the ELM327 AT Commands, but will not transmit OBD messages - it is for code development only, and not for use in scan tools.

Available in: 28-pin PDIP $32.50 CDN, 28-pin SOIC $32.50 CDN

ELM331 - Solid State Thermostat Data Sheet

331 Basically a resistance comparator, this device monitors the resistance of a standard (inexpensive) NTC thermistor, compares it to a reference, and provides a control output depending on the relative values. Proportional hysteresis is provided to reduce hunting.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM334 - Garage Doorman Data Sheet

334 This IC is used to relay the position of a garage door to a remotely located red/green LED. A simple two wire connection is all that is needed. With the addition of a couple transistors, these same two wires can also be used to control an output for operating an electric garage door opener. This one is handy for late at night when you're not sure if you closed the door or not.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM337 - Light Switch Data Sheet

337 An easy way to interface to light dependent resistors, or photocells. One external resistor sets the threshold point, and internal circuitry provides line frequency filtering, hysteresis, and delay on pickup and dropout of 1 msec to 10 minutes.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM339 - Infrared Remote Control Data Sheet

339 Use an inexpensive television remote control to control up to three separate devices. Handy if you just want to start up your shop vacuum, or turn off the lamp next to the television. This IC can't drive power line level outputs directly, but with suitable relays or triacs it will provide all the control you are likely to need.

Available in: 8-pin PDIP $8.50 CDN, 8-pin SOIC $10.00 CDN

ELM341 - Low Power Thermostat Data Sheet

341 Very similar to the ELM331, this IC switches to standby mode between temperature measurements, to reduce power consumption. This is convenient for designs that may be required to operate on a backup battery supply for extended periods of time.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM365 - Security System Controller Data Sheet

365 All the basics for a home security system, in one 8 pin package. This integrated circuit provides delayed and immediate operation as well as automatic alarm reset after five minutes. Both pulsing and steady outputs are provided for driving a variety of alarm devices. Buy many and create a multizone system!

Available in: 8-pin PDIP $9.00 CDN, 8-pin SOIC $10.50 CDN

ELM380 - Battery Charger Timer Data Sheet

380 A single pushbutton press initiates either an eight or a fourteen hour timing cycle for charging Nickel Cadmium batteries. If desired, the period can also be programmed in one hour increments. Requires a full-wave rectified 60Hz signal for timing.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM381 - 60Hz Long Interval Counter Data Sheet

381 Reduce circuit board clutter when trying to obtain those very long time delays. The ELM381 provides 1 hour to 1 week periods using a 60Hz clock input. Digitally select one of four desired periods, apply a line frequency signal to the Schmitt clock input, and use the high current outputs to drive your circuit.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM382 - 50Hz Long Interval Counter Data Sheet

382 Reduce circuit board clutter when trying to obtain those very long time delays. The ELM382 provides 1 hour to 1 week periods using a 50Hz clock input. Digitally select one of four desired periods, apply a line frequency signal to the Schmitt clock input, and use the high current outputs to drive your circuit.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM460 - Impossible Oscillator Data Sheet

460 This integrated circuit uses no external timing components to generate signals with periods from 0.1 seconds to 10 minutes. Timing is digitally selected via four input pins, and complementary output signals are provided. It doesn't have as much output drive as a 555, but sure is much easier to use.

Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

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ELM320 - OBD (PWM) to RS232 Interpreter		Data Sheet
	The ELM320 allows you to talk to your 41.6KHz J1850 PWM OBD (On Board Diagnostics) equipped vehicle through a standard RS232 serial connection, using only simple ASCII commands. This updated version remains just as easy to use, but is now completely programmable, allowing even more control, and of course possibilities. As before, the user need only issue the desired commands - the data formatting, error checking, bus arbitration, etc. is all handled by the ELM320. If you presently use one of our v1.x ICs, you will be pleased to know that this version (v2.0) is pin-compatible with the old (the only difference at power-up is that linefeeds are now on by default). Simply unplug the old and plug in the new. This IC only supports the 41.6KHz J1850 PWM data format which is typically used in Ford Motor Company vehicles. If you have a different vehicle, please refer to our ELM322 and ELM323 products.
	Available in: 8-pin PDIP $16.50 CDN, 8-pin SOIC $18.50 CDN

ELM322 - OBD (VPW) to RS232 Interpreter		Data Sheet
	Similar to the ELM320, and also completely revised, the ELM322 is for connecting to an OBDII equipped vehicle which uses the 10.4KHz J1850 VPW format. This standard is typically used in General Motors Corporation and some DaimlerChrysler vehicles. The user need only issue the desired commands through an RS232 serial connection and the data formatting, error checking, bus arbitration, etc. on the vehicle side is all taken care of by the ELM322. This allows experimenters to inexpensively create their own 'scan tool'. If you presently use one of our v1.x ICs, you will be pleased to know that this version (v2.0) is pin-compatible with the old, so you can simply replace your IC if you want to upgrade.
	Available in: 8-pin PDIP $16.50 CDN, 8-pin SOIC $18.50 CDN

ELM323 - OBD (ISO) to RS232 Interpreter		Data Sheet
	The ELM323 completes our trio of OBDII ICs, allowing you to talk to your ISO 9141-2 or ISO 14230-4 standard OBDII equipped vehicle using an RS232 serial connection. It transparently converts between a 10.4KHz ISO data stream and standard ASCII characters, allowing trouble codes and operating parameters to be easily retrieved without the need for special software. No knowledge of data formatting, error checking, bus initiation etc. is needed either, as the ELM323 handles all of it for you. The present version of the ELM323 (v2.0) provides several programmable features that the previous versions did not offer. It now allows programmable header bytes, adjustable timeouts, the ability to report in the packed data mode, and offers a special monitoring mode as well. This is in addition to all of the capabilities that the v1.x ICs offered - the full seven byte command structure, two line (K and L) initiation, software selectable linefeeds and character echoing, and the visual feedback provided by the four LED outputs. If you currently use one of our v1.x ICs, you will be pleased to know that this version (v2.0) is pin-compatible with the old, so you can simply replace your present IC with one of these, and immediately begin enjoying these new features.
	Available in: 14-pin PDIP $17.50 CDN, 14-pin SOIC $19.50 CDN

ELM327 - OBD to RS232 Interpreter		Data Sheet
	We've improved our best OBD Interpreter, so now it's even better! The new ELM327 v1.3 IC has taken the proven v1.2, added more error monitoring and recovery, added several more AT commands, has improved the CAN printing, and has added a few features that many of you have been asking for. To name just a few of the new features, you can now: set the maximum number of responses to obtain remove spaces from ECU responses (to speed data transmission) store a unique identifier in EEPROM set the CAN mask and filter with one command easily switch between variable and fixed CAN message lengths send CAN remote frames (RTRs) The IC has been well-tested to date, with some very favourable responses. We think that you will be pleased as well. Download either the 'QuickSheet' (a 6 page summary), or the full (59 page) Data Sheet for a more complete description of the new ELM327. The new ELM327 still converts OBDII data (ISO 15765-4 CAN, SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 and SAE J1939) for you - we've just made it better, with no increase in the price! We are currently shipping version 1.3 of this IC.	QuickSheet
	Available in: 28-pin PDIP $32.50 CDN, 28-pin SOIC $32.50 CDN

ELM328 - OBD Device Identifier Test IC		Data Sheet
	The ELM328 IC is electrically identical to the ELM327 except that it offers one new AT command which can be used to reset the @2 Device Identifier lock. This provides code developers with a means to repeatedly test code which writes to the @2 device identifier, without requiring a new IC each time. Note that the ELM328 supports all of the ELM327 AT Commands, but will not transmit OBD messages - it is for code development only, and not for use in scan tools.
	Available in: 28-pin PDIP $32.50 CDN, 28-pin SOIC $32.50 CDN

ELM331 - Solid State Thermostat		Data Sheet
	Basically a resistance comparator, this device monitors the resistance of a standard (inexpensive) NTC thermistor, compares it to a reference, and provides a control output depending on the relative values. Proportional hysteresis is provided to reduce hunting.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM334 - Garage Doorman		Data Sheet
	This IC is used to relay the position of a garage door to a remotely located red/green LED. A simple two wire connection is all that is needed. With the addition of a couple transistors, these same two wires can also be used to control an output for operating an electric garage door opener. This one is handy for late at night when you're not sure if you closed the door or not.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM337 - Light Switch		Data Sheet
	An easy way to interface to light dependent resistors, or photocells. One external resistor sets the threshold point, and internal circuitry provides line frequency filtering, hysteresis, and delay on pickup and dropout of 1 msec to 10 minutes.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM339 - Infrared Remote Control		Data Sheet
	Use an inexpensive television remote control to control up to three separate devices. Handy if you just want to start up your shop vacuum, or turn off the lamp next to the television. This IC can't drive power line level outputs directly, but with suitable relays or triacs it will provide all the control you are likely to need.
	Available in: 8-pin PDIP $8.50 CDN, 8-pin SOIC $10.00 CDN

ELM341 - Low Power Thermostat		Data Sheet
	Very similar to the ELM331, this IC switches to standby mode between temperature measurements, to reduce power consumption. This is convenient for designs that may be required to operate on a backup battery supply for extended periods of time.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM365 - Security System Controller		Data Sheet
	All the basics for a home security system, in one 8 pin package. This integrated circuit provides delayed and immediate operation as well as automatic alarm reset after five minutes. Both pulsing and steady outputs are provided for driving a variety of alarm devices. Buy many and create a multizone system!
	Available in: 8-pin PDIP $9.00 CDN, 8-pin SOIC $10.50 CDN

ELM380 - Battery Charger Timer		Data Sheet
	A single pushbutton press initiates either an eight or a fourteen hour timing cycle for charging Nickel Cadmium batteries. If desired, the period can also be programmed in one hour increments. Requires a full-wave rectified 60Hz signal for timing.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM381 - 60Hz Long Interval Counter		Data Sheet
	Reduce circuit board clutter when trying to obtain those very long time delays. The ELM381 provides 1 hour to 1 week periods using a 60Hz clock input. Digitally select one of four desired periods, apply a line frequency signal to the Schmitt clock input, and use the high current outputs to drive your circuit.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM382 - 50Hz Long Interval Counter		Data Sheet
	Reduce circuit board clutter when trying to obtain those very long time delays. The ELM382 provides 1 hour to 1 week periods using a 50Hz clock input. Digitally select one of four desired periods, apply a line frequency signal to the Schmitt clock input, and use the high current outputs to drive your circuit.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN

ELM460 - Impossible Oscillator		Data Sheet
	This integrated circuit uses no external timing components to generate signals with periods from 0.1 seconds to 10 minutes. Timing is digitally selected via four input pins, and complementary output signals are provided. It doesn't have as much output drive as a 555, but sure is much easier to use.
	Available in: 8-pin PDIP $8.00 CDN, 8-pin SOIC $9.50 CDN