Power Supply Which type of power supply is required? The system requires only +5v. A 3 point regulator 7805 series is installed , and it is possible an input voltage from 9 to 15vdc. In alternative a switching regulator allows an input range from 12 to 30vdc.

Parallel output What is the specification for the parallel output? It is an 8 bit port at TTL level, and is direct connection from microcontroller. On this port we have 6 bit of data, according the key pressed, 1 bit of data ready, and 1 toggle bit

Toggle bit What is the toggle bit? It is a bit that changes each time that a key is released and next is repressed , independently from the repetition or the change of key. It repeat the action of our finger.

Using Toggle bit What is the toggle bit used for? It is useful if we want discriminate if among two burst of code, we have an release of the key, that could mean an intention of decelerate the event, to difference of a continual key pression , that doesn't change state of toggle bit.

I.R. Standard Which standard of remote control is accepted from the receiver RMT32? RMT32' standard is RC5, that is the most common, for example used in many philips TV.

Autorepeat Autorepeat time specifications? In the RC5 standard remote control, we have an autorepeat of code transmitted every 115 milliseconds (8 Hz).

Timing Data valid time specification? It is active (logic 1) at the complete receiption of the first code through few microseconds, and remain active for all the time of autorepeat, and ten after around 100msec from the release of the key.

Serial line Seriale line standard? It is a rs485 multipoint,mono or bidirectional, master or slave.

PC Com connection It is possible to connect the RMT32 directly to COM port of PC? No, a converter of interface needs rs485-rs232. Such device is easy to found commonly in commerce, and is also available.

Diagnostic If are there problems of operation, which could diagnostics tools use? Integrated in the firmware is available a diagnostic mode, and that through the serial line and an ascii terminal (i.e. a pc with win terminal or hyperterminal running) we can perform different proofs, among which test of the parallel door, correctness of the received codes, trace of the codes ,caption of codes erred for setting troubles etc.

Interferences Like could I avoid that does a TV remote control operate my system? Using a remote control with custom codes. The standard RC5 foresees 5 said system-bit that could be changed for this purpose. You must set correctly the RMT32 receiver with 5 minijumper for recognize these 5 bit of system.

Custom Code Coast do much have a code of different system from those used usually, and then very sure? The WALLIS UNIVERSAL furnishes the first 2 remote control with custom code to a price of around 50 euro (50 $), inclusive the costs of development.

I.R. HEAD Which heeds must I take for installthe IR head? You must be snug from bright intense fonts or quickly varying. An abrupt change of illumination must be "compensated" from the sensor, that remains blinded for a brief time, like it happens for our eye.

TLC-head alignment Is necessary that the remote control and IR head "do they see"? No, the system functions very well also of reflection on a clear wall, and usually gets the mark in any direction it correctly we orient oneself.

Environmental illumination Are there bulbs particularly few indicated for the illumination of the environment where we install the RMT32 head? That which damage more greater problems are the pipes to the neon, seen that their light not and abiding. In peculiar highlighted problems with bulbs to the neon to tall strain have been, those used for the bright insignias. With an orientation contemplated we have resolved the problem.

Real employment Could I have any example of where really is used the receiver RMT32? Yes, we have mounted 30 ones in multipoint configuration on rs485 beside the museum foundazione Accorsi ,Turin, Italy, ([www.fondazioneaccorsi.it]) where they come used for the control of the plant of illumination through remote control.

Errors Is possible have a wrong code? The burst is composed from 14 bits, each of which is formed from an one and a zero logic, or vice versa. We have then to 28 bit, all driven in their integrity. Error is fairly rare , but not impossible. For machinery or applications particularly dangerous is always advisable do many check of correct code, i.e. wait two or many even codes, executable thing in firmware, but that obviously decelerates the clever and the promptness of the system.

Serial line code What type of codes run on the serial line? Always ascii caracters. Is possible have byte decoded and filtered, to example a character [ascii] for each key of the remote, which the letters of the alphabet or numbers and symbols, or is possible have the 14 bit on some bites, to use of the owner.