Tech Place

Raspberry pi Security Camera For this project, we are going to use raspberry pi and a camera module to stream the camera feed over WiFi and also over internet. This is an interesting project. With this, we can access the live camera feed from anywhere in the world on any device. The good thing about this project is that you need least number of components to work on and a very easy installation procedure. Again,for this, i would use any of the Raspberry pi 0 w or the Raspberry pi 3. But i prefer Raspberry pi 0 w as it is compact. Parts: 1) Raspberry pi 0 wireless: Get one at Microcenter cheaper or order at Amazon . You can also use Raspberry pi 3. and a micro SD card. 2) Camera module: There are several camera modules available in the market. I chose this camera module because it is compact. 3) Power Supply for the board. We can power it in either directly using the wall outlet or a Portable power bank. 4) A Monitor, mouse and keyboard for the initial setup. Installati

Wireless USB Hub using Raspberry pi A wireless USB Hub is a very useful maker project. It is much more useful when you are working on boards and chords hat have to be plugged and unplugged every time. For instance, it makes my job much easier when I am working on a board like Arduino or Raspberry pi on an autonomous machine. I do not have to move the whole autonomous project up to connect to my system messing up with the servo positions. Instead, i can connect it to my wireless USB hub and start using it anytime. Parts: Before choosing the parts, we can finish this project with any of the raspberry pi boards. But i chose Raspberry pi 3 or Raspberry pi 0 w because they have WiFi chip-sets integrated on the board. It just reduces the setup time and extra electronic components hence cutting down cost. Again there is a decision to be made here. Raspberry pi 0 w has one micro USB port outlet where as Raspberry pi 3 has 4 USB A outlets. The procedure of setup is same on both the board

RTL-SDR: SDR is a Software defined radio. An SDR RTL is a software defined radio using a DVB-T TV tuner dongle. Previously the software defined radios used to be very expensive. Now that there is a new driver developed which accessed the I/Q data, the DVB-T TV tuner dongle can be used as a software defined radio. An SDR RTL is nothing but a Software defined radio with the  RTL2832U chipset. I got my SDR RTL from amazon.  It is a $20 cheap dongle.  You will be amazed with what you can do with these surprisingly cheap dongles. We can access the whole spectrum of radio communication and play with the settings a bit to do what expensive SDR's like SDR play, Airspy and BladeRF can do.  Parts: 1) The Dongle itself. I ordered my dongle from amazon.  It is a NooElec NESDR Mini USB RTL-SDR :  RTL-SDR 2) A PC with UBUNTU. Why Ubuntu? Nothing in specific but it is easy to work on Ubuntu with the drivers compared to windows which involves too many installations. I tried both and