"author: Leonid Ridiko, Victor Lapitskiy Since iButton DS1990A introduced in market from Dallas Semiconductor (MAXIM), it has been used in many applications concerning security, access control systems etc. In this project we will use iButton as a key to an electronic lock. This electronic lock can use many"
iButton electronic lock

"Using the Onboard  8-Bit A/D Converter of the PIC12C67X Before we get deep into how to use the A/D converter, let’s find out how to configure the PIC12C67X I/O-pins using the A/D configuration registers.  The PIC12C67X series has two configuration registers for the analog port-pins. "
PIC12C671 A/D converter Part 2

"There’s still a lot of power in the BASIC Stamp I, as Ernie proves with his new project on how to: By: Ernie Negus Project Designer: Ernie Negus Project Files: port80.zip File Size: 316K Email the designer at: nernie@uswest.net Note: This project requires access to an EPROM burner to program the code definitions. The program"
PC with the aid of the BASIC Stamp

"Have you ever wished your keychain knew where your car was? The Finder is a prototype of that device. It is a keychain-sized GPS device with two buttons, Save and Find. Pressing Save records your current location. Pressing Find visually leads you back to the saved location. Up"
GPS Finder

"Specifications Operating modes Circuit description - Oscillator Circuit description - Micro-computer Self calibrating Measuring Inductance and Capacitance Construction Troubleshooting Operation Accuracy and Resolution Parts List Full circuit diagram Ordering kit Specifications RANGE .001 mH (1 nH) to 100 mH (most units measure to 150 mH) .010 pF to 1 mFd (most units measure to 1.5 uF) (capacitors must be non-polarized) AUTOMATIC RANGING Accuracy: 1% of reading Typical Typical means the"
LC METER PROJECT