Let's Make It (HD) - Tech-zen.tv

This week we talk about how to use the feature packed shift register we used on the multiple 7 segment displays 2 weeks to control an LED array.

This week we make a simple VU meter using an Arduino. We take audio input from either a microphone or a line level input and use a small transistor to amplify the signal, add some leds and some basic code to create a VU meter that has a switchable peak meter.

This week we take a look at using a shift register to control a single 7 Segment Display then we take a look at the Maxim 7219 chip that is designed specifically for controlling up to 8 7 Segment displays or an 8x8 LED matrix. Plus you can connect these chips serially like a shift register to add control of an additional 8 displays for each additional chip.

This week Bob is back and talk about how to control one and many relays with an Arduino. Also, an update on the live light project.

This week we attach a joystick control to an Arduino to control a pair of servos. It is much simpler than you think!

This week mike takes a look at some viewer requests. One a complete failure and the other may be working, but if it is working it is weird.

This week we expand on shift registers from last week and add another chip to demonstrate how you can daisy chain them to control more things with the same 3 pins off of the Arduino. Oh, did I mention that I have a special guest on the show tonight? Watch and Meet Bob.

This week we attach a shift register to an Arduino to demonstrate how to use a shift register to multiply the number of outputs that you can have on an Arduino.

This is our first week on using shift registers and we go over the basics of sending the serial data to the shift register from the Arduino.

This week we finally are taking a closer look at the Raspberry Pi, show you where to get Raspian Wheezy, how to load it onto the SD card.

Then we do some basic control of an LED with the built in GPIO port by making it blink by writing a script in python to blink the LED.

Then, for our final demonstration, we take the Ustream check we did in episode 10 and re-create it in python on the Raspberry Pi and turn on the LED if our stream is up. Plus we also are capturing some statistics data.

This week we take an RFID reader and attach it to an arduino. We first show you how the RFID reader works by sending in the TAGID on the RFID Tag. Then we are going to take our project from episode 11 that takes keypad input and attach the RFID reader to create a 2 factor authentication system to simulate allowing access into a secure space.