Above, an RFID chip is implanted into the right hand.
Continue reading ‘RFID Wristbands – One Step Closer to the Mark of the Beast’ »
Archive for the ‘Circuits’ Category
Will robots take over the world? If robots rise up, will they keep people around in zoos? There is hope. Watch the video for details.
Continue reading ‘People Zoo’ »
Edison, in 1877, made the first recording on his tinfoil phonograph. He recorded “Mary Had a Little Lamb”.
Continue reading ‘First Audio Recording Ever by Thomas Edison’ »
Do smoke alarms cause cancer?
This is an experiment generating electricity from scrap metal.
Made my 2nd Joule Thief today, a little different than the first one.
Looking for a bluetooth transmitter? This one might be good for you.
I enjoy listening to podcasts using my N810 Internet Tablet and my bluetooth headphones (Creative CB2530 wireless headphones). To use bluetooth headphones, you will need a bluetooth transmitter connected to the source, in my case connected to the N810 tablet. This post is a review of the bluetooth transmitter and some tips on how to repair one of its failure modes.
My car started giving me all kinds of electrical problems. I popped the hood and found a nest!
Read on to see how a small animal caused electrical trouble for this car.
How does the number of turns in the toroidal inductor affect the performance of a Joule Thief?
To make one of these, you need to start with a toroid, which is a piece of ferrite (Iron) shaped like a doughnut. You will also need wire. I used 0.3mm coated copper wire.
I’ve been wanting to do this for many months. I finally got some scrap parts together and made my first Joule Thief. This circuit milks the last bits of energy out of your “dead” batteries.
Circuit diagram, video, pictures, and observations included…
I tried making the Joule Thief as shown in a Make video from makezine.com.
The results were not as expected, but I found a variation of the Joule Thief circuit that worked better for me. I share some of the results with you in this post.
Want to know how much power the MSP430 uses? I show a way to reduce the power consumption of the Launchpad by 97%. Read on and see the video.
When driving LED’s with a microcontroller, chances are you won’t have enough power coming out of the microcontroller’s pins to power an LED. For example, the TI Launchpad MSP430 only allows for a reliable 1.5mA of power out of each pin. To drive an LED, you might want more like 20mA. So you will need an external circuit to safely drive the LED.
Read on and see the video.
It is simple to measure the forward voltage of an LED. You just need an appropriate choice of battery and resistor. Read on and see the video…
If you have a broken TV, there are lots of electronics inside you might want to keep.
My USB adapter quit working. I opened it up to see what the circuit looks like and determine what caused it to fail.
Also shown: Charging a cell phone with a wind turbine.
Review of a 12V splitter. This is also called a 3-way cigarette lighter adapter .
This adapter plugs into a single 12V battery outlet and splits it into three outlets. Could be used to power three gadgets from your car or from wherever else you have a 12V outlet. I have one in my house for off-the-grid backup power.