Electronics for the Back of the Class

[Lolucoca]

@revsilverspine How about a coilgun powered from an 18650 lithium battery? I mean, you would need some high-voltage, high capacitance caps, and a few other things It'd be fun to shoot with this kinda stuff  

[You_are_a_cunt]

43 minutes ago, Lolucoca said:

@revsilverspine How about a coilgun powered from an 18650 lithium battery? I mean, you would need some high-voltage, high capacitance caps, and a few other things It'd be fun to shoot with this kinda stuff  

You mean railgun, right?

I made one back in the 90s. Fairly low scale since we were using rollerskate bearing balls but that fucker was a huge power drain (an arc welder ate less power than it).

Can do but won't, since it's highly illegal

[iamdarkyoshi]

2 hours ago, revsilverspine said:

You mean railgun, right?

I made one back in the 90s. Fairly low scale since we were using rollerskate bearing balls but that fucker was a huge power drain (an arc welder ate less power than it).

Can do but won't, since it's highly illegal

I made one for school that ran on solar energy

[iamdarkyoshi]

2 hours ago, Lolucoca said:

@revsilverspine How about a coilgun powered from an 18650 lithium battery? I mean, you would need some high-voltage, high capacitance caps, and a few other things It'd be fun to shoot with this kinda stuff  

I have a 35uF 5KV capacitor I could use...

[You_are_a_cunt]

25 minutes ago, iamdarkyoshi said:

I made one for school that ran on solar energy

well back in the 90s (1998 to be more precise) I couldn't get my hands on fancy patsy stuff. Everything we used was scrapped from whatever we could find.

 

Oh the joy 6-year old me felt... before my dad decided it wasn't safe to let me use the railgun and dismantled it. 

[iamdarkyoshi]

24 minutes ago, revsilverspine said:

well back in the 90s (1998 to be more precise) I couldn't get my hands on fancy patsy stuff. Everything we used was scrapped from whatever we could find.

 

Oh the joy 6-year old me felt... before my dad decided it wasn't safe to let me use the railgun and dismantled it. 

Mine was made from a light dimmer and some disposable cameras

And solar panels of course

[Lolucoca]

2 hours ago, revsilverspine said:

You mean railgun, right?

Nope, railguns sit on, as the title suggests, rails. They are used because of their accuracy, but they still use bullets. The coilgun/gauss gun however uses an electric current pushed through a coil to create a magnetic field which pushes the projectile forward. 

[iamdarkyoshi]

Another project here.

The red and black wires are connected to a pushbutton switch, and the black and white wires are a 12v input. I will be adding a mosfet and relay to this thing tomorrow to pin 3 of the chip. The chip is a 555 timer wired dead bug style (I am out of PCBs... And project boxes) so I have to get creative. The green and silver thing is a 10k pot.

 

What is the purpose of this device? First correct answer wins an internet cookie.

[You_are_a_cunt]

5 minutes ago, iamdarkyoshi said:

Another project here.

The red and black wires are connected to a pushbutton switch, and the black and white wires are a 12v input. I will be adding a mosfet and relay to this thing tomorrow to pin 3 of the chip. The chip is a 555 timer wired dead bug style (I am out of PCBs... And project boxes) so I have to get creative. The green and silver thing is a 10k pot.

 

What is the purpose of this device? First correct answer wins an internet cookie.

Smells like a light dimmer. And melted plastic. And hotsnot

[iamdarkyoshi]

1 minute ago, revsilverspine said:

Smells like a light dimmer. And melted plastic. And hotsnot

Nope. This is not a light dimmer (though what the relay will be switching does dim the lights slightly)

 

And the plastic is not melted, just dremmeled out. I have to get creative with project boxes, this is the disk drive blank from an optiplex tower

[Huntsman]

@iamdarkyoshi A timer perhaps? Although no clue to what that to252-ish thing is doing.

 

@revsilverspine Challenge: Digital clock using ONLY 555 and passives.

 

p.s. No idea if it's even practically possible, but it does sound cool.

[You_are_a_cunt]

1 minute ago, Huntsman said:

@iamdarkyoshi A timer perhaps? Although no clue to what that to252-ish thing is doing.

 

@revsilverspine Challenge: Digital clock using ONLY 555 and passives.

 

p.s. No idea if it's even practically possible, but it does sound cool.

not entirely sure it's possible. I'd have to look through my old electronics books and see if I can find anything. If it's possible but highly unpractical I'll just post schematics.

Either way, I kinda need a new clock so might as well make one, even if it's not a 555 and passives.

[iamdarkyoshi]

18 minutes ago, Huntsman said:

@iamdarkyoshi A timer perhaps? Although no clue to what that to252-ish thing is doing.

 

@revsilverspine Challenge: Digital clock using ONLY 555 and passives.

 

p.s. No idea if it's even practically possible, but it does sound cool.

It is a timer! I built it to reliably switch my battery tab spotwelder on for a certain length of time. The 3 pin IC is a 7805 voltage regulator. 

[Huntsman]

18 minutes ago, revsilverspine said:

not entirely sure it's possible. I'd have to look through my old electronics books and see if I can find anything. If it's possible but highly unpractical I'll just post schematics.

Either way, I kinda need a new clock so might as well make one, even if it's not a 555 and passives.

Currently working on digital clock with VFD display and GPS time sync lol..

3 minutes ago, iamdarkyoshi said:

It is a timer! I built it to reliably switch my battery tab spotwelder on for a certain length of time. The 3 pin IC is a 7805 voltage regulator. 

hmm.. I do have a capacitor discharge spot welder in my list of projects

[iamdarkyoshi]

1 minute ago, Huntsman said:

Currently working on digital clock with VFD display and GPS time sync lol..

hmm.. I do have a capacitor discharge spot welder in my list of projects

Mine is just a rewound microwave oven transformer, I used 4AWG wire.

[You_are_a_cunt]

2 minutes ago, Huntsman said:

Currently working on digital clock with VFD display and GPS time sync lol..

hmm.. I do have a capacitor discharge spot welder in my list of projects

Currently working on paying my credit card debt, so yeah. Not much in the line of projects I can do unless I already have everything in my pile-o-junk