Relay Board
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 FIRE LITE ALARMS ANN RLY RELAY BOARD MOUNT IN COMMON ENCLOSURE  US $202.00
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 FIRE LITE ALARMS ANNRLY 10 relay board Mounts in common enclosu US $192.00
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 FIRE LITE ANN RLY 10 relay board US $168.00
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 NAPCO SECURITY SYSTEMS RB3008 OCTAL 8 RELAY BOARD US $132.00
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 NAPCO RB3008 inOCTALin 8 RELAY BOARD US $127.00
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 NORTHERN COMPUTERS AEP 5 RELAY SUPERViSED iNPUT BOARD US $99.95
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 VIKING LDB 1 LOOP DETECTOR RELAY BOARD US $59.00
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 TYCO SAFETY PRODUCTS RXL2 433 2 Form C Relay Boards US $55.00
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 INTERNATIONAL ELECTRONICS 293 3 RELAY BOARD 212 SERIES US $54.00
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![LINEAR 293 0 219000] IEI 293 3 RELAY PLUG ON BOARD](http://www.techsmores.com/images/e/221007848271_0.jpg)
 Hirsch Electronics Relay Expansion Board 8 Relays Model REB8 US $30.00
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 ALTRONIX RB30 RELAY BOARD 12 24V 30A CONTACT US $27.00
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 Hirsch Electronics REB8 Relay Expansion Board Warranty US $25.00
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 ADVANCED SOURCING ASRB 1 UL Relay Board 612 or 24 VDC US $20.00
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 ADVANCED SOURCING ASRB 1X5 Relay Board 12 or 24 VDC US $20.00
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 ALTRONIX RB5 RELAY BOARD 6 OR 12 V US $20.00
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 ALTRONIX RB524 RELAY BOARD 24V US $20.00
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 Altronix Power Relay Board RB5 US $11.60
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 Cardkey relay board US $9.99
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Test You Car With On-Board Diagnostics 2
Have you seen those movies where the lead character has this "sentient" vehicle capable of understanding voice commands and running self-diagnostics and such? "Computer, status report" is an all too familiar line we hear in movies like Batman. With current advancements in computer and micro-tech, this reality is not too far off in the future. This has already gained precedence with the advent of the On-Board Diagnostics system or OBD system. OBD in this sense refers to the system which enables the vehicle to diagnose itself and report whatever problems or malfunction part it might have. The OBD systems provide vital information to the owner of the vehicle or to a repair technician without all the hassle of having to get "down and dirty." The OBD systems were introduced in the 1980's but were of limited capability and usually only used a Malfunction Indicator Light (MIL) to tell you something was wrong but not what was wrong. This of course has led the developers of the OBD systems to work more in improving the performance of the system in providing greater detail on vehicular anomalies.
This drive for a more improved diagnostics system has led to the development of the On-Board Diagnostics 2 or OBD 2 systems. With this, you also need truck shop manuals. The OBD 2 systems has a digitized data port which can be connected to a scanner and/or reader which can be used to relay information relating to vehicular problems and malfunctions, possible and/or otherwise. These data ports and error codes which are a key feature of all modern OBD 2 systems have been standardized so as to eliminate the previous difficulty of having incompatible readers, scanners and the like. This standardization occurred because a federal law was passed which required all manufacturers in the United States to all OBD 2 related systems and devices compatible among other U.S. made car manufacturers.
The new OBD 2 standardized interfaces have the same set of features for all U.S. made cars after 1996. This new and standardized system differs in a major way from its predecessor, and that is it is located two feet at the most from the steering wheel as opposed to being under the "hood" like the old OBD systems. This system has gained a lot of importance that it has been adopted by some if not most European countries. The OBD 2 systems can provide data as wide ranging as being able to monitor engine temperature to things like tire pressure and other vehicle related conditions. These data are made available by a little device built into the car, called the Engine Control Unit or ECU. The ECU is like the car's "brain" which measures and collects data about your vehicle's health and then relays this information to a data storage device which is connected to the OBD 2 interfaces for easy access and convenience. The advancements in technology have made vehicle maintenance and repair easier for the ordinary Joe and the hardcore mechanic. These days you don't need a shed of tools and a long Sunday afternoon to just tinker and fix your car.04 chevy 2500 hd repair manual
How to wire a 5V DC relay?
I want to make a toggle or rocker switch to act as a momentary push button switch for keyboard control.
The relay I'm going to use has 5 terminals.
The top 2 terminals I believe are to be connected to a capacitor, switch terminals and DC power supply. Now, I am not sure which terminals out of the 3 left to connect as output i.e. to the control board.
Thanks for any tip.
I hack a USB keybaord to emulate with switches. Since keyboard would take momentary inputs, a toggle switch would repeat input. This circuit is supposed to make the input from a toggle switch to a keyboard as momentary. I don't know how which of the 2 terminals of the 3 from the relay should be connected to the keyboard chip (only 2 inputs).
Hmmm, it's not clear what you are trying to do. What function do you want the relay to have? Isolate two power supplies? Latch the output? If latch, how do you want to un-latch (turn off) the device. What's the significance of the control board?
email me and I can send a sketch back
Arduino controlled four socket outlet (Hackaday)
Never get between a man and his salami. [Mike] needed a way to control
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[Mike] decided the best course of action would be to control line voltage with
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Eight Channel Relay Board test
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