3 more posts in this thread. [Missing image file: kite1.jpg]
I doing some experimenting to improve aviation safety, and by June or July, I'll need to get a payload of about one pound at least 1,000 abkve ground for initial demonstration.
I'm not sure how to do this, and I have a few options, and am hoping for /diy/'s advice.
Rockets are out, because of the speed and shock.
A quad rotor or other r/c could work, but I don't have either of those, so there would be some initial cost, and then the problem of keeping the testbed in flight, and would the weight of that payload be too great for a platform like that?
Assuming I make it our of my own personal financial hole I'm currently in, I will be able to afford a biennial flight review and plane rental, and just strap the payload to the mains or wing strut. the downside there is that I would need a group of people on the ground to collaborate with, not to mention people freaking out about me strapping something to an airplane.
A kite? I don't know jack about large kites other than that large kite fliers call themselves pilots.
6 more posts in this thread. [Missing image file: Benchalim2_thumb.png]
hey guys & gals,
i'm just an electronic newbie and want to make
a "bench" power supply on the cheap (tired of making voltage dividers every time i have to work w/ something i don't have the adequate supply for).
I made this schema (http://imgur.com/wc88kX5) based on this idea (http://hackaday.com/2012/06/26/bench-supply-built-in-a-power-strip/).
that'd output 3.3V,5V,10V,12V,15V,24V,1 variable(2.5-15V) @500mA (exept the 24v which come strait ou the original suplly, can pup up 1.2A) for something around 15€ (+pcb+original supply which is flea market bought ).
The original build had switches but these ones would pimp the price tag a bit too much (more expensive than the vregs at my usual supplier (mouser)...)
so, got some questions:
- do you see any blatant error in the schema ?
- would you choose other vregs ? why ?
- could the switches expand that much life expectancy of the vregs ?
- have ideas to enhance it "on the cheap" ?
thanks for advice
1 more posts in this thread. [Missing image file: thyristor-circuit-symbol.png]
Amateur electronics enthusiast here. Working with some thyristor circuits. First objective was to allow power to get to an LED by triggering the gate of the thyristor. Simple enough. Now I'm trying to let voltage pass through one LED, light up, then charge a capacitor, and once the cap is charged, apply voltage to the gate of a thyristor and then pass power through to another LED, and I can't seem to figure it out. Most thyristor applications I've found are for converting AC to DC, etc. Any thoughts on this circuit I'm trying to build?
Any other various uses for thyristors?