Foreword
Use for long of LED clock indication screen, can produce certain cumulative error, reason uses period of time to need to undertake corrective, monitor of clock of Dan Dabing act, normally suspension is in relatively altitude, the adjustment of time and revise need a staff member to climb altitude to undertake operating, both neither is convenient, insecure, how to perfect circuit structure, designing a safety, practical remote control circuit is the problem that lover of a lot of electrons pays close attention to all the time. This system designed a kind of LED clock that uses wireless remote control to revise clock data to display screen.
Systematic composition
Emitter of 1 remote control
Graph block diagram of emitter of 1 remote control
Remote control emitter by 6 key-press, F06A the component such as diode of 4 wireless emissive chip, segregation is comprised. If pursue,1 is shown.
2LED clock screen controls a system
Control system receives module, sheet by J06A remote control piece circuit of drive of DS2321 of chip of clock of machine AT89S52, real time, EEPROM, LED form.
Screen of graph 2LED clock controls systematic block diagram
Hardware circuit is designed
1 radio remote control shoots a share
Circuit is shown 3 times like the graph, emissive component uses the F06A module that takes coder oneself, its launch frequency to stabilize in 315MHz, working voltage limits is 3 ～ 12V, emissive power is 10mW. This system uses power supply of batteries of two 3V button, can work above of half an year. This module has 8 / encode of 3 condition address, use at identifying to blast off with autodyne one to one correspondence, be affected to electric equipment of other remote control in case and produce misoperation. When installing this module, code to 8 addresses end has proper link first (encode) , be like will 1, 2 addresses are received for tall n, criterion address code is 11000000. 4 data bring crural D1, D2, D3, D4, end of 4 data in this design joins respectively key-press S1, S2, S3, S4, s1 is key of functional condition switch, s2 is adjust " add " key, s3 is adjusted " decrease " key, s4 bolts to affirm. Expanded at the same time two key-press S5, S6, show as open respectively bolt and shut indication key. LED is key-press indicator light, s7 is mains switch of remote control part. This module launchs a distance to be 10m normally, if adscititious one grows the sheet that makes an appointment with 24cm aerial, emissive distance is farther.
2 remote control receive a share
If the graph is shown 4 times,remote control receives a share, receive module to use the J06A that uses with F06A form a complete set, the working voltage of this model is 2.6 ～ 3.6V, receive sensitivity to be 5 μ V, there are 8 addresses to make up end on its, when using, its join must agree with the address encode of emissive module. This module receives frequency to be 315MHz, the demodulation of interior of classics of remote control signal that it will receive, decipher, reductive for as identical as emissive end password signal, from 4 its data output end presents sheet all the way piece mouth of P1.0 ～ P1.3, another method keeps apart D10 of diode D7 ～ , control dynatron Q8 guide, make thereby odd generation interrupts a machine INTO, odd after the information of a P1.3 of ～ of machine general P1.0 and former set information undertake contrast, execute corresponding operation thereby.
Previous12 Next