I wanted to make an easy and secure way to enter my garage. RFID was the best way to unlock my door, even with my hands full I can unlock the door and push it open! I built a simple circuit with a basic ATMega 168 arduino chip and a ID-20 RFID reader to control […]
Arduino RFID Door Lock Read More »
After making a 8X10 matrix a lot of people asked me about expanding the matrix to some thing bigger, and some wanted to write stuff to the matrix via a PC, so one day I looked at a pile of LEDs that I had leftover from a LED cube projected and I decided to make
Make a 24X6 LED matrix Read More »
Programming microcontrollers isn’t hard. Building a programmer makes a great first electronics project. The goal of this instructable is to explain the simple ‘in circuit serial programming’ method used with Microchip PICs.Programming a big DIP (through hole) chip is easy. Pop it into a socketed programmer, burn, and return to the application circuit. Test and
Understanding ICSP for PIC Microcontrollers Read More »
I designed this circuit for the same reason that i designed the SMPS Boost regulator with the MCP1640 – To gain experience in SMPS technology. This time i use the high power LM2595 buck regulator.The circuit accepts any AC voltage from 8 to 45 Volts. This wide input voltage range is a remarkable feature! Plus,
SMPS with Battery Backup and NiMH Charger Read More »
The MAX14777 quad SPST switch supports analog signals above and below the rails with a single 3.0V to 5.5V supply. The device features a selectable -15V/+35V or -15V/+15V analog signal range for all switches. Each switch has a separate control input to allow independent switching, making the device an alternative to opto-relays in applications that
Quad Beyond-the-Rails -15V to +35V Analog Switch Read More »
This work includes, GTP USB (not plus or lite) . The schematic, photos and PCB have been developed by PICMASTERS based on some valuable works done before. This programmer supports pic10F, 12F, 16C, 16F, 18F,24Cxx Eeprom. Unfortunately, it works with only Winpic800 v.355. We have succesfully tried it with some pics; PIC18F252, 18F2455, 18F2550, 18F2520,
GTP USB PIC PROGRAMMER Read More »
What was that? A Whats-a-Maja-Thimagig? Yep – One of those! This Instructable extends my Arduino Ethernet controller to control a set of up to 6 relays, but that’s not the neat bit. The neat bit is that there is a web based state machine in the AtMega chip so that the relays will operate in
A Remotely Programable Relay Controller Read More »
This instructable fully describes building a PWM driver to control four LEDs from one small Microchip 12F609 board.The original design was called the “Kemper LED Lamp” and I sold a few lamps to several brave folks through my web site. However, I’ve come to discover selling small quantities to a few folks is a major
Open Source Microchip LED / PWM Driver Project Read More »
With an enhanced offer of X-chip series USB chips, it´s possible to immediately choose a type suitable for your application. The family of X-Chip series USB chips we introduced to you in the article „New X-chip series will connect you to USB even easier and faster!“. Gradually these USB chips gain still more popularity thanks
X-chip series – USB while you wait Read More »
If you’ve ever been designing a circuit and had to experiment with different values of caps and resistors, you probably didn’t like it much. It can be a hassle to switch out components over and over, trying to find the right combination to suit your needs. With RC filter circuits, it can be quite difficult
Build a Resistor/Capacitor Selection Box Read More »
