Well i have been exceptionally silent but not lazy... Been working full time and have a new awesome projects i am going to share. This one is a teaser still not a full step by step as i will edit this in the next few days to add detail but for now here is the teaser. Making a Joule thief lamp to run a high powered 3.3v super white LED from a 1.1v (used 1.5v) battery. This was the start but if you know our site you will know we all about green, read on for the twist.. So step one .....
Step 1: Build a Joule Thief
I followed this diagram to build my first one. This is so simple you almost cannot go wrong. Except to forget to wire the coil so the windings run in opposite directions. The best way i find to wrapp tje toroid is to strip about a meter of network solid core cable. Then make 20 windings. In the end you will have 4 ends join 2 ends each different colour, but here is the trick.... Take the start of the one colour and the end of the other colour and join them. I find it easier to put the resistor on the base of the tranistor for ease of construction.
Step 2: Working Lamp
Now once you have a working thief you can build it into a lamp of any description..... As per my original pic. This step shows my lamp working on a partially deplkeated aaa battery. At the time it was sitting at 1.3 volts...... Now for the twist.
Step 3: The Twist
I hate the fact that i must rely on a battery.... So i made my own. This is a glass coffee bottle, i enjoyed every cup i made from the coffe it once contained. I installed a joule thief in the lid with 2 ultra bright LED in lid shining into bottle in parallel. I then turned the bottle into a battery with bleach. The voltage when off is 1.4, running it is 0.7 so far it has been running for 72h no stop and still good as a night light. After 72 hours voltage at 5.8v..... The best part is total cost is less than R5.00 or about 50 usd cents....... watch this space for details and do not forget to visit us at www.upcycle.co.za for more ideas and projects
Step 4: Running
This is my bleach driven joule thief night light in action. So remember this is a short version as was to exited to share and did not want to add the detail tonught.