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1. Encoder Decoder Sets TX 01 12 bit encoder motherboard 8 bit address 4 bit data RE 01 12 bit decoder motherboard 8 bit address 4 bit data Operation Information The RE 01 latching data outputs are TTL level 0 Low OV 1 High 5V The term latching means that whatever data sent to the data outputs remain on the output pins until new data are sent even after the incoming transmission stops Switches 9 12 must be on in order to use the RE 01 data outputs If switches 9 12 are off all data output wires will be disconnected from the data pins on the decoder IC and no data will appear on the output wires The momentary relay on the RE 01 board closes when a valid address is received and unlike the data outputs only remains active until the incoming transmission stops Address bits are set according to the positions of switches 1 8 If an address switch is on the corresponding address bit will be sent low If an address switch is off the corresponding address bit will be sent high The RE 01 address switch settings must match the address switch settings of the compatible encoder board TX 01 in order to achieve accurate data transmission The RE 01 accepts a serial TTL level data input This input should be connected to the data output on any MING receiver board RE 66 or RE 99 Power is supplied to the selected receiver by way of the 3 pin connector located on the RE 01 Testing and Troubleshooting Certain probl2. IOTEIO TO TA Anuy sso ywy Jed uoTIsINnboy eq Iowy JIouadQ 100g Ige wy O1JUOD SSOTOIT A suonvoddy quvodgdasHLoW Ysqd004 d Lid cb TO A ONI NWNALSASOHODIN O NIIIN The RE 01 is a 12 bit decoder board Itis ideal for almost any application needing a wireless control system When used with the TX 01 encoder motherboard TX 99 or TX 66 transmitter board and RE 99 or RE 66 receiver board the RE 01 offers 4 bits of data providing up to 16 different codes 8 bits of address ensure that data sent from your transmitter encoder is passed on to the RE 01 data outputs and all stray data are rejected The 8 bit address also allows up to 256 individually addressed receivers to be used with a single transmitter This set works well in applications such as gathering data from remote sensors or controlling remotely located objects such as lights valves motors or just about anything else Specifications Operating Voltage Operating Current requency Circuit Type i 0 C to 40 C Storage Temp 20 to 80 C PHYSICAL Other Available RF Products Transmitter Receiver Sets TX 99K1 300MHz AM RF LC based single button transmitter with encoder TX 99K2 300MHz AM RF LC based Two button transmitter with encoder TX 99 V3 0 300MHz AM RF LC based transmitter RE 99 V3 0A 300MHz AM RF super regenerative receiver TX 66 V3 0 310MHz AM RF transmitter with SAW resonator RE 66 V3 0A 310MHz AM RF super regenerative receiver
3. PLIES TO OUR REMOTE CONTROL PRODUCTS BREAKDOWN OF A REMOTE CONTROL SYSTEM A remote control system is any system with controls or commands delivered to the main unit from a distance in this case by way of radio frequency transmission The remote system we will discuss includes an encoder transmitter receiver and decoder All of these parts must be used in order to attain a complete link See descriptions below ENCODER An encoder is a circuit in which a code or signal presented in one format can be changed to a format compatible with the circuitry it interfaces with In the case of the TX 01 the format delivered by the user is a 12 bit parallel code consisting of 8 address bits and 4 data bits This code must be changed to a serial format in order to become compatible with the transmitter s input This is the job of the TX 01 encoder motherboard or more specifically the HT12E encoder IC found on the TX 01 encoder motherboard TRANSMITTER A transmitter is a circuit with an output sent through the air by sound or electromagnetic waves at a specific frequency In the case of the TX 99 the output is an amplitude modulated radio frequency of 300MHz The transmitter receives a coded signal from the encoder and uses that signal to modulate its 300MHz carrier In simple terms the output of the transmitter is an electromagnetic representation of the input data code RECEIVER A receiver is a circuit capable of accepting and processing light so
4. d apply power If the address of the encoder matches the address of the decoder and the power supply is at least 9VDC for both the TX 01 and RE 01 the Valid ID relay on the RE 01 should be closed If the relay is not closed an attempt should be made to tune the receiver board The frequency of the receiver board can be modified by carefully turning the variable capacitor located on top of the receiver board This should be done with a plastic or ceramic screw driver The variable capacitor looks a lot like a flat head screw and has a half turn range This means that if you have adjusted the capacitor more than one half ofa turn in either direction you will have gone through the entire range of the capacitor and should have picked up the signal Continue slowly turning the capacitor until the Valid ID relay closes This procedure can be repeated at various distances up to 100 feet away from the transmitter The guaranteed operating distance of these sets 1s 50 feet but with a little attention and a wire antenna these boards are capable of about 100 feet If you are unable to achieve the guaranteed distance of 50 feet or if you feel that tuning these boards is beyond your ability please contact your vendor for replacements These boards are tuned from the factory and should have at least a 50 foot range Tuning is only recommended when greater distances are required or in the event that a board appears to be defective GENERAL INFORMATION THAT AP
5. ems can arise when working with RF products Ifthe transmitter or receiver boards are not accurately tuned or possibly defective the desired signal may never reach its destination At the same time if the address of the encoder board does not match the address of the decoder board or either board is defective again the desired signal may never reach its destination It is sometimes very difficult to tell what the actual problem is The following instructions should be helpful The first thing to be tested are the encoder motherboard TX 01 and decoder motherboard RE 01 These will become very useful in testing and if necessary tuning the transmitter and receiver To check the TX 01 and RE 01 you must remove the transmitter and receiver from these boards Make sure both motherboards are connected to the same power supply and connect the data pin on the TX 01 to the data pin on the RE 01 located on the 3 pin connector with a piece of wire With both addresses matched and power applied the Valid ID relay on the RE 01 should be closed If the relay is not closed and your power supply is above 9VDC contact your vendor and request replacements Now that you have determined your TX 01 and RE 01 boards are functioning accurately the transmitter and receiver can be tested Attach the transmitter to the encoder board and apply power Attach the receiver to the decoder board position them about 50 feet away from the encoder transmitter boards an
6. escribed above the data code consists of a combination of four 1s and or Os representing 16 possible states If a 5V signal is applied to one of the four data lines or if the data line is left floating not connected this is considered a 1 If 0V or ground is applied to one of the four data lines this is considered a 0 By using different combinations of 1s and Os on the four data lines 16 separate control commands can be sent IC s are available such as the 74HC154 which can turn the 4 bit data output of the RE 01 into amore user friendly output giving you the option to select 1 of 16 different output pins to activate per transmission If the 4 bit data code is being sent to a micro controller or if less than 4 different commands are needed these extra IC s are not needed IMPORTANT NOTE The bandwidth utilized on our RF modules was intended for experimental use in applications that require only short burst transmissions Our RF boards must be used with their intended motherboards TX 01 amp RE 01 and cannot be used for continuous serial data applications Ming Microsystem s RF products are designed for experimental use and are not FCC approved It is the responsibility of the user to verify compliance with FCC regulations on their own application and obtain an FCC approval number for the final product which is to be marketed LIMITED WARRANTY This product is warranted against manufacturing defects in materials and wo
7. rkmanship for 30 days from the date of purchase Within this period Ming Microsystem will at its option repair or replace the product or any part thereof without charge for parts and labor This warranty does not apply in the following cases Improper installation misuse failure to follow installation and operating instructions alteration abuse accident or tampering Ming Microsystem is not responsible or liable for indirect special or consequential damages arising out of or in connection with the use or performance of the product or other damage with respect to any economic loss loss of property loss of revenues or profit or costs of removal installation or reinstallation Except as provided herein Ming Microsystem makes no express warranties and any implied warrant of merchantability or fitness for particular purpose is limited in its duration to the duration of the written limited warranties set forth herein There will be charges rendered repairs to the product made after the expiration of the aforesaid 30 days warranty period This warranty gives you specific legal rights and you may have other rights which vary from state to state FOR TECHNICAL SUPPORT PLEASE CALL 626 961 6273 www ming micro com support ming micro com
8. und or electromagnetic waves of a specific frequency In the case of the RE 99 the 300MHz radio frequency signal sent by the transmitter is received and the incoming data extracted from that signal The extracted data is then sent out in serial format to the decoder board DECODER A decoder is a circuit in which a coded signal of a specific format usually that of its compatible encoder is received and changed to a format compatible with the circuitry it interfaces with usually the format originally presented to the encoder is the same format used for the output of the decoder when used in wireless systems but not always In the case of the RE 01 the incoming code is a 12 bit serial format This code must be checked to ensure that the first 8 bits address bits match the address of the decoder IC This is the job of the RE 01 decoder motherboard or more specifically the HT12D decoder IC found on the RE 01 decoder motherboard If the incoming 8 bit address is correct the last 4 bits of the 12 bit code data bits are passed on to the data outputs of the RE 01 and the Valid ID relay closes and remains closed until the incoming signal is no longer present The 4 data bits however latch and remain in whatever state they were set to by the last transmission until they are changed by the next transmission DATA CODES A data code is a set of numbers or letters representing some form of information In the case of the encoders and decoders d
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