How to Make a cord from Plastic Bottle and should work for aluminum cans. It has the benefit of easy adjustment to the with of the strap.
I’m ham radio i am using a lot of aluminum strips and I’m thinking that will turn a can into strops of metal. Not to mention once heated it should tighten up on anything you place it on.

5 to 30 Dollar Security DVR

If you use a raspberry pi Zero they are running 5 bucks + old web cam. Not a bad deal for a DVR. At this time all the software is free.
Links below:
ccrisan/motioneyeos http://github.com/ccrisan/motioneyeos
Wiki http://github.com/ccrisan/motioneyeos/wiki
Down load http://github.com/ccrisan/motioneyeos/wiki/Supported-Devices
Installation http://github.com/ccrisan/motioneyeos/wiki/Installation

Amazon for the hardware : http://amzn.to/1W0uBt7
Just get any Raspberry pi .. Pi zero is 5 bucks when in stock.

Raspberry Pi 2 Model B (1GB)–NEWEST VERSION– With Clear Compact Case http://amzn.to/1JrzfON
Samsung 32GB EVO Class 10 Micro SDHC up to 48MB/s with Adapter (MB-MP32DA/AM) http://amzn.to/1PdxGAI
Edimax EW-7811Un 150Mbps 11n Wi-Fi USB Adapter, Nano Size Lets You Plug it and Forget it, Ideal for Raspberry Pi / Pi2, Supports Windows, Mac OS, Linux (Black/Gold) http://amzn.to/1JrzzNx
Opitional
Rii Mini Wireless 2.4GHz Keyboard with Mouse Touchpad Remote Control, Black (mini X1) for Raspberry pi/HTPC/XBMC/Google and Android TV KP-810-10LL http://amzn.to/1JrzCsB
HQST 100 Watt 12 Volt Monocrystalline Bendable Solar Panel http://amzn.to/1Pdxd1v
PiTFT 2.8″ Touchscreen for the Raspberry Pi http://amzn.to/1JryYvb
Uniker Raspberry Pi 2 Model B Quad Core for Raspberry Pi Model (B+) 5- Inch 800×480 Pixel Hdmi input Touch Screen & Stand Case http://amzn.to/1Jrz6uI

I hade to make the Baofeng radio to TNC /Sound Card cable because the Baofeng is designed to key up the radio when the Grounds of the Speaker and microphone are shorted. This presented a problem when using a USB sound card for a interface. the universal ground what shorting the two leads. so we need to make a ground loop isolator and set the radio to VOX. not it words for the SVXLink on the Raspberry Pi Repeater / Echolink Node.

How to Solder copper wire to aluminum foil.

I will be making some disposable variable capacitors later today for some magnetic loop antennas.
This is also a useful technique to solder copper braid to an antenna.

I think you can use any oil. the important thing to remember is keeping Oxygen form the foil. You don’t want it to oxidize before you get the solder down.

It’s indoor and stealth good for getting info when the power is out or a natural disaster has happened.

Stealth Antenna is good when you can’t set one up outside.

I really don’t know anything about BitCoin. This seems kind of neat.

Part of amateur radio is that no transmission may be encrypted except radio control craft. Are they circumventing this rule?

I though long and hard about this. Encryption is only allowed in radio control of models or from the control station of a satellite. This is not really encrypting communications so I doubt it would be against those rules. I’d think it would be against the no business conducted rules before the no encryption rules.

The block chains are at their most basic just lists of bitcoin transactions. (I know it’s more complicated than that) While cryptography is used to create and authenticate bitcoins and their associated transactions the block chains are distributed in plaintext. It’s not like there is a key exchange over the air and an encrypted data stream created, it’s simply updated lists of where (which wallet) the bitcoins should be.