ok, armed with a DC SSR, hooked it all up via the one 12v battery again (thinking positive) and h...@y, it all works perfectly!
totally l33t, thanks all for your help and advice, its assistance such as this that makes this such a great place. Now I have an RC controlled single-shot musket (first the shot, then the powder...then pack it all down). Semi-automatic reload capability next. Ben On Aug 23, 3:23 pm, Gregory Pwneror <[email protected]> wrote: > Heh, I was right then. Shows that it's always the simplest things that make > the biggest problems. > > -Gregory > > > > On Sun, Aug 23, 2009 at 3:05 PM, Modena <[email protected]> wrote: > > > well I am officially an idiot. Looking a little closer, the SSR is AC > > load. Some googling on "SSR not switching off" told me that if you try > > to switch DC with an AC SSR this may happen. > > > <runs down to Jaycar to buy the correct SSR> > > > will report back later > > > On Aug 23, 1:01 pm, Modena <[email protected]> wrote: > > > no I am not sure, but the way I see it if the input voltage is zero to > > > the SSR, the load pins should not make a circuit, but it seems once it > > > does make a circuit, it stays that way > > > > Mike Mane: you can get voltage regulators, in either kit form or pre- > > > fab, I'm using one in T067 to drop 24v -> 12v, and then another one to > > > drop 12v -> 6v. They are rated at certain max amps, heat being the > > > issue. > > > > On Aug 23, 12:44 pm, Gregory Pwneror <[email protected]> wrote: > > > > > Are you sure it's not the solenoid that's causing your problems? > > > > > -Gregory > > > > > On Sun, Aug 23, 2009 at 2:42 PM, Modena <[email protected]> wrote: > > > > > > I just tried seperating the PSU's, powering the logic and SSR off a > > 6v > > > > > and the solenoid totally seperate off 12v, same issue, switches on > > and > > > > > stays on. > > > > > > basically the whole thing was connected to a 6v battery, one lead of > > > > > the solenoid went to + of a 12v battery, the other solenoid wire went > > > > > to a load pin on the SSR, the other load pin went to - on the 12v > > > > > battery. > > > > > > when it stays on, the relay is NOT powered at the input, yet it still > > > > > makes a load circuit, WTF ? how can this happen? > > > > > > driving an LED off the same terminals as the SSR input and the LED > > > > > blinks as expected for the time delay and then switches off, so the > > > > > 555 seems to be doing its thing; press button, LED comes on, solenoid > > > > > switches on, time delay expires LED goes off, solenoid stays on, SSR > > > > > load circuit stays complete > > > > > > I'm confused > > > > > > On Aug 23, 11:51 am, Mike Mane <[email protected]> wrote: > > > > > > I might as well ask an electrical question myself. What is the > > > > > > cheapest (or at least simplest) way to reduce the main tank's > > voltage > > > > > > X volts to power small, intricate IC's, etc on a circuit that > > require > > > > > > <X volts? Is there any way to reduce voltage like this without > > harming > > > > > > the circuit or messing up the battery? Is resistance the answer? > > > > > > > —Mike "not the electrician" Måne > > > > > > > Message sent by way of mobile device > > > > > > > On Aug 22, 2009, at 7:49 PM, Don Shankin <[email protected]> > > wrote: > > > > > > > > Good call, just be careful around those caps > > > > > > > > On Sat, Aug 22, 2009 at 6:13 PM, Gregory Pwneror > > > > > > > <[email protected]> wrote: > > > > > > > If you need to find a MOSFET look inside an old computer power > > > > > > > supply, they usually have half a dozen of them inside. They also > > > > > > > have 1600uf capacitors :) > > > > > > > > -Gregory > > > > > > > > On Sun, Aug 23, 2009 at 7:36 AM, Frank Pittelli < > > > > > [email protected] > > > > > > > > wrote: > > > > > > > > Don Shankin wrote: > > > > > > > > Are you talking about MOSFETs? They're essentially voltage- > > > > > > > controlled > > > > > > > > transistors (as opposed to being current controlled). > > > > > > > > Yes, there is a new breed of MOSFETs called "self-protected > > MOSFETs" > > > > > > > that are specifically designed to be driven from logic levels and > > that > > > > > > > protect against all kinds of problems. For example, see: > > >http://www.onsemi.com/PowerSolutions/parametrics.do?id=819 > > > > > > > > The last time I looked (about 6 months ago), they only produced > > them > > > > > > > in > > > > > > > tiny surface mount packages (which are too small for my eyes and > > > > > > > soldering skills :-) However, while googling to answer this > > > > > > > question, I > > > > > > > see that they are now producing them in good old TO-220 packages, > > so > > > > > > > I'll have to see if my normal electronics suppliers stock them as > > > > > > > well. > > > > > > > > The nice thing about this new breed is that (a) they are designed > > for > > > > > > > logic level inputs, (b) they protect the logic circuit from load > > > > > > > problems and (c) they don't need suppression diodes when used > > with > > > > > > > inductive loads. Basically, they are a one package solution for > > > > > > > switching 4-6A loads. When I start noodling with circuit > > designs in > > > > > > > the winter (the official season for circuit noodling) I plan on > > > > > > > playing > > > > > > > with them to see how well they work for my purposes (cheap, > > durable, > > > > > > > easy to repair). > > > > > > > > Frank P. > > > > > > > > -- > > > > > > > ---------- > > > > > > > Donald Shankin > > > > > > > Computer Engineering Undergrad > > > > > > > Blue Marble Security Member > > > > > > > IEEE Vice Chair, MTU Chapter > > > > > > > NSBE Telecommunications Chair, MTU Chapter > > > > > > > CAEL Partner > > > > > > > (507) 301-2499 > > > > > > > [email protected] > > > > > > > [email protected] > > > > > > > ---------- --~--~---------~--~----~------------~-------~--~----~ You are currently subscribed to the "R/C Tank Combat" group. 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