LM317T Voltage Regulator with Pass Transistor

2 Homemade RGB LED-Strips controlled by an Arduino board. Each LED-Strip is seperated in 3 segments, those are driven by BD140's. And each LED-Strip has RGB colors, those are driven by BD139's. Here is a sketch for driving of one color led for one segment. img837.imageshack.us



http://www.youtube.com/watch?v=XRkGkw-zpZI&hl=en

In some previous experiments,I found that a voltage regulator can be used as an oscillator so I tried an unregulated 3v-12v wall adapter and ended up with a circuit that works and it can be used as an exciter in conjunction with a 10uH wire wound axial inductor. It will light lots of leds and will light a neon all at a fairly low amp draw. Updated circuit and inductor details img194.imageshack.us uk.farnell.com



http://www.youtube.com/watch?v=r-It4B3aiPc&hl=en

V-Guard became the synonym for voltage stabilizers across South India. The company soon extended their range of products to include Voltage Stabilizers, Water Heaters, Solar Water Heaters, Electrical Wires, Cables, UPS's, and Ceiling Fans. www.vguard.in



http://www.youtube.com/watch?v=a_4feyjh9LA&hl=en

YouTuber djgrooveline has done a review of the Adhoc Voltaggio Automotive Voltage Stabilizer. Thank you djgrooveline. This video is re-uploaded with his permission. To view this video in its original context please go to: www.youtube.com Djgrooveline's channel: www.youtube.com Go to www.adhoc-tech-sci.com for product details.



http://www.youtube.com/watch?v=67FDIGXHNVk&hl=en

http://www.youtube.com/watch?v=xf2s4KPooNA&hl=en

(Joel Dingman): It's a good day to make electricity at Dry Fork Station. (Tom Stalcup): There it is. We just synced. The Dry Fork Station has been synced to the transmission grid. That means electricity is flowing from the plant for the very first time. Crews have dedicated a lot of time and energy preparing for major milestones like this one. It's all part of getting the plant ready for commercial operation. (Tom Stalcup): Friday morning we rolled the turbine for the first time. We had several valve tests we had to run; we had to test the emergency lube oil system. We had to test the emergency trip system. We did all of that over Friday and Saturday and towards the end of the day on Saturday, about half way through I guess, we started working on the AVR which is the auto voltage regulator. The auto voltage regulator is what controls the voltage on the generator, which is how the plant actually syncs to the grid. (Tom): Then we did a dummy synchronization. What we did is we left the disconnects, the line side disconnects open on the generator breaker and then we first manually synced, by closing the generator breakers, but it wasn't connected to the transmission system so it had no power output and then once we proved that then we proved the auto-synchronization. (Tom): "Let's roll the turbine." For the actual sync, crews roll the turbine and increase its rotations per minute to 3600, increasing about 360 rpms every minute. Then with the click of a mouse, electricity is ...



http://www.youtube.com/watch?v=sgBzQaH5pWY&hl=en

This is a demonstration of a "Minimum Theremin" electronic project that I got from Art's Minimum Theremin website. It is very simple to build and uses 2 hex inverter IC chips. Other components include resistors, electrolytic and ceramic capacitors, and 2 trim pots (variable potentiometers). I used a pie plate as an antenna and hope to improve it by finding a better antenna. The original design used a 9 VDC battery and a 5 VDC voltage regulator TO5 chip but I had a regulated 5 V power supply handy and substituted that.



http://www.youtube.com/watch?v=U0pflm4VxX4&hl=en