RFID Car Finder using PIC12629

No Comments »

The PIC and the ID-12 are powered by a 7805 5v regulator via some basic filtering caps.  The PIC is in an endless loop at this point, reading available data from the ID-12.  Once a card/tag is read, it compares the string with up to 10 tags it has in EEPROM.  If one matches, it activates the transistor which in turn activates the relay and the program stops.  If there is no match, it just keeps waiting for data. The bi-colour LED indicates the status. source : http://www.instructables.com ......

No related posts.

Optical flex sensors circuits

No Comments »

This worked, but if I recall correctly the resistance response wasn’t linear but the EZIO ADC, so this meant that I lost resolution and couldn’t reliably tell the difference between a lightly closed hand and a fist. In the end, I made my own flex sensors. In a nutshell, each flex sensor was an IR LED, an IR sensitive diode (I think), clear aquarium tubing, scrap wires (black), and heatshrink. Basically, this was a ghetto fibre optic cable (dategloves back then had fibreoptic sensors that det ......

Related posts:

  1. Playstation Dual Force 2 controller connector pinout Dual force 2 Controller Pin Pin Name Description 1 DATA...

High Voltage Amplifiers

No Comments »

Here is a high voltage wideband amplifier designed to provide large voltage swings at high slew rates in wideband systems. The true inverting op-amp topology employed in this high volatage ampifiers schematic's provides excellent D.C. specifications such as input offset voltage and input bias current. These attributes are important in amplifiers that will be used in high gain configurations since the input error voltages will be multiplied by the system gain. FEATUREUltra Low Quiescent Cur ......

Related posts:

  1. Simple Light Switch circuit This circuit build using Op Amp 741, Though designs vary...
  2. High Power Led 11.8 Watt Z-Power series is designed for high current operation and high...
  3. Over Voltage Protector Circuit Here is Simple Over Voltage Protector. This circuit protect your...
  4. High Voltage Parallel Programmer AVR AVR has two different programming modes called Parallel Programming...
  5. Notebook Power Car Adapter 19 Volt Car cigarette lighter output DC voltage is 12 V, even...

Build Own RFID circuit

No Comments »

The terminal of the coil is connected to the GP4 port. In order to transmit data to the RFID reader, we have to modulate the low frequency carrier by changing the coupling between the reader and tag antennas. We can achieve this by switching the GP4 as input The IO pins and the external coil form a LC resonant circuit and act as an antenna. This antenna will pick up the carrier generated by the RFID reader. The recovered carrier is rectified thanks to the bridge formed with the clamping di ......

Related posts:

  1. Electronic lock with key and generic RFID 125KHz RFID The circuit is based on low-cost AtTiny2313 ATMEL microcontroller. It...
  2. Build own PABX Circuit consists of following stages. 1. Microcontroller The heart...
  3. RFID Technology Applications An RFID system consists basically of two  compo- nents:...
  4. RFID Car Finder using PIC12629 The PIC and the ID-12 are powered by a 7805...
  5. USB to RS232 Using Atmel ATtiny2313 or ATmega8 The Universal Serial Bus (USB) interface has become extremely...