This easter the city has placed two giant chickens made from twigs outside my house as an innocent easter decoration. I however immediately recognized them for what they were; T-1000c:s, killer robot chickens sent back from the future! All I needed to complete the transformation was the telltale red glowing eyes.
I set out to complete the transformation. Since I did not expect to get what ever i built back again, I decided not to use any expensive components. I also wanted the eyes to turn off during the day to save battery.
What I came up with was a simple circuit, where a transistor acts as a switch and switches depending on the resistance of an LDR (Light dependent resistor). This way the eyes turn on at night when it´s dark outside, and off during the day.
- 1 x 2n2222 Transistor
- 1 x LDR that varies between ~6k ohm when exposed to light and ~60k ohm when it’s dark
- 2 x red LEDs
- 1 x 20k ohm resistor
- 2 x 48 ohm resistor
- Some perfboard and wires
- 1 x 50 cm (20 in) stick
- 2 x 1.5V alcaline batteries
- Duckt tape
I taped together the two batteries with some aluminium foil, and placed them between the poles to make solid contact . I then waterproofed everything with duct tape and installed the whole thing by showing the stick through the head of the chicken.
So happy easter from jenslabs and the T1000c!
In the recent days videos from people who actually made some DIY graphene has started to pop up on youtube and in this post I will introduce you to a few of them.
One of the very first people who I think deserves a mentioning is Robert Murray-Smith. Robert is a MacGyver of DIY chemistry and he would of course not be doing something as trivial as buying graphite oxide when you can make it your self from graphite. Robert has posted a whole series of movies where he makes graphite oxide and components necessary for making your own DIY super capacitor. The first videos have terrible sound picture and sound quality but along the way Robert has bought a new camera and more recent videos look and sound much better. Robert has also written some books you can buy online at kobobooks.
Additional videos about graphene and super capacitors from Robert.
- How to make graphene oxide part 1 – improved audio
- How to make graphene 2 – improved audio
- Graphene part 3 – an update and making graphite intercalated compounds
- Graphene 101
- How to make supercapacitors at home part 1 – introduction
- How to make supercapacitors at home part 2 – Fungal Chitin
- How to make supercapacitors at home part 3 – alternative sources
- How to make supercapacitors at home – part 4 – extracting cuttlefish chitin
- How to make supercapacitors at home part 5 – Hydrothermal Carbonisation
Eric Goeken is the first DIYer to post a video where he successfully produce some light scribe graphene the same way I discussed in my first post about DIY graphene. He bought some graphite oxide powder online and went from there.
Additional videos about graphene from Eric.
- Laserscribe graphene made at home – update
- Application of graphite oxide solution to PET substrate
- Graphite oxide dispersion using a jewelry cleaner
The user behind unitedstatesgraphene doesn’t go out with his real name in public but he seems to be on his way to make light scribe graphene all the way from graphite as described by Robert. He has gotten to the point where the graphite oxide is drying on the CD-substrate waiting to go into the light scribe burner.
I wish them all the best of luck and I look forward to follow their progress.