Circuit-Zone.com - Electronic Projects
Posted on Thursday, April 29, 2010 • Category: FM Transmitters
In order to simplify the transmitter design, we've used the new pll circuit from Motorola :the MC145170.
This PLL includes the prescaler and a serial standard bus called SPI.
Posted on Thursday, April 29, 2010 • Category: PIC
Circuit measures the temperature and ambient brightness of the surrounding environment at the location it is placed. The data from the ADC is the calculated and displayed on the LCD. The main CPU unit on board the device is the PIC16F873.
Posted on Thursday, April 29, 2010 • Category: Remote Control
This is a true 'minimalist' remote, having but three functions:
Volume Up, Volume Down and Mute
Volume is controlled by a motorized (motorized for US readers) pot rather than any of the 'digital' pots that now abound, and this was done for a number of very good reasons.
Posted on Wednesday, April 28, 2010 • Category: FM Transmitters
This map, armored also enables automatic MONO / MPX through a low-pass filter, even with a multiplex on its entry by using an ON / ON, panning, the whole spectrum MPX more RDS is sent to the synthesizer, on the other hand when it is in a position MONO, the low-pass filter is activated and share its cutoff frequency at 15 KHz, only modulation G + D is sent to the synthesizer, as 19 KHz. 19 KHz carrier, the signal multiplex and subcarrier 57 KHz is thereby eliminated, which provides ease of use for example in a string of issue relay tuner, if the link between the issuer Departure and receiver re-issue was not of good quality stereo, you sufficient to switch to mono to improve sound quality, you can then connect the RDS encoder at the re-issuer.
Posted on Wednesday, April 28, 2010 • Category: PIC
Manji broj proizvođača proizvodi IC kola za USB podršku. Najpoznatiji su: Cypress Semiconductor, FTDI, Philips i drugi. Microchip je 2000 godine proizveo mikrokontrolere PIC16C745 i PIC16C675 koji su imali podršku za USB komunikaciju i tako se pridružio ostalim proizvođačima. Ovi mikrokontroleri podržavaju USB 1.1 standarad, odnosno USB sa brzinama rada do 1.5 MBs. Nova serija Microchip-ovih mikrokontrolera urađenja u flash tehnologiji PIC18F2445/2550/4455/4550 je podržala USB 2.0 standrad. Ovo su moćni mikrokontroleri sa brzinama takta i preko 40Mhz i veličinom programske memorije od 32K reči. O stanadardima za USB možete na sajtu http://www.usb.org. Upravo na ovim mikrokontrolerima urađen je interfejs sa USB komunikacijom.
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