Recent content by supak111

No there is more to the circuit... obviously a full bridge rectifier and a few other things but its not a complicated circuit. I do have a fuse, thanks 👍

It's a simple circuit I made (which actually works pretty damn good) to restore/desulfate old car lead acid batteries. I was just wondering what the max wattage the circuit was putting out.

Hi, maximum current was what I was after as I'm not yet sure what my load is going to be. So capacitor impedance turn out is ~265 ohms, so my max current is ~0.45A (if I'm correct lol) Thanks for the help

Hi can someone tell me please how much current is passed though below circuit: 120 AC 60Hz mains power going through a 10uF 500v capacitor in series

Thanks everyone, yes I was wondering about a pipe that's closed on one end, forgot to specify.

How do I calculate a resonate frequency of a length of pipe submerged totally under water? Do I just take speed of sound in water which is 1,481m/s at room temp, and decided it by length of pipe in meters multiplied by 4? so at 20 celsius water and 20cm pipe it would just be: 1481 / (.2 x...

Thanks for your replies guys. Dashpot sounds like a perfect idea especially since I won't have to modify it much. What makes the dashpot cool is most have adjustable timing like the dashpots on your house screen doors. Clock timer is a good one too if I can modify it to fit. And the 1lb of...

Hey everyone, I need to make or design a simple mechanical time delay. This probably isn't easy since I can't find anything on the market that's small and cheap. Was thinking some wind up toy might work, haven't found the right one yet. I was thinking maybe small box with a rod coming out of...

Will do and thanks.

Yea this is true. Is the heating and cooling linear? What I mean is does it take same amount to go from 20 to 21C and it does to go for 90 to 91C for example?

Lol. So it basically: 80C x 800g x 4.2J= 268,800J? Or am I not doing this right? Seeing how a AA battery only has about 10,000J, I would consider that significant ;-). In fact I'm kind of shocked it would take about 27 AA batteries

Hey everyone can anyone tell me how much energy is released (joules) if you take 1 liter of water at 100C and drop it down to 25C (room temp, reg pressure)? Is it significant amount? Better even how much energy is released (approximately) for every 1c drop in temp? Is the release in energy...

Don't really want to use 555 timer because its electric and won't be dirt cheap. Dashpot is too expensive and complicated, I want to keep this under a $1 if possible. Lewis I found a lot of info on all 3 you suggested but can't really use them. My device MUST be easy/fast to push down but...

Yea. I was thinking maybe something with cylinder, spring, air and a one way valve. Kinda how the screen door closer works but flipped around. If I made the one way valve leak air a tiny little bit it would take a long time before the arm comes back

No actually but now that you mention it, that sure would be a good device for Halloween. Do you have any ideas on how this could be achieved Dave?