Haha, maybe, but im not just a newbie to this, but have avoided all things like this as much as possible for a long time, so im even worse. The steam locomotive I volunteer on is a far cry from any of this.
Plenty of help here, don't worry.Ok, I will, thanks
I have reviewed the source you provided, and understood about half the words. I am not yet able to read cicuit schematics, so this is vey confusing.
The timing is based on the value of the capacitor and the resistor.I am gathering that timing duration is based on the capacitors value?
I had thought about that, but there can be no physical interaction with the money as if paper money is dropped into it it may simply get hooked on the lever switch. Thanks anyways though.Maybe you could have the coin fall on a lever switch to temporarily complete the circuit.
http://parts.digikey.com/1/parts-kws/lever-switch
Basically, yes.Im just ahppy I actulally know what you are talking about with the 555 v. 556 timers. A 556 is simply two 555s stuck together, yes? I believe they share incoming power pins or something like that.
Best bet for sizing relay is to consider maximum expected load andWhat do you think the relay's capacity should be, im thinking around the capacity of the power supply, about 12v/ 600 milliamps.........The smoke unit will consume 120milliamps, and the light should consume about 25 milliamps, I dont know how much the circuit will use, but I think the motor is the biggest power variable of all.
Supplying motor with excessively low voltage to reduce speed isAnd, since you are a machinist pencil, what would be more practical / economical, a small 12v motor linked to a series of brass reduction gears or a 12v motor supplied with 1.5 volts so it goes really slow. I supplied a 2300 rpm 24 volt motor with 3 volts, and it went at the right speed. So I figure if I can find a small 12 volt 2300rpm motor and supply it with 1.5 volts, it should do the same thing right?
See above note about wasting power.BTW i plan to use about 6 3.3 volt zeners in parallel and some resisitors to reduce the 12 volt output for the light and smoke unit to 3.3volts for the motor. I have been unable to find a 1.5 volt zener, so I went a little higher than reccomended on the resistor. It said 10 ohms, so I will go with 15, and hope it drops the voltage a little closer to 1.5.
This sounds like an excellent situation. Remember, one step/componentI went to the elctronics teacher and he said he would have one of his students set down with me and build the circuit, at no cost to me! I hope to add this on to the circuit for the motor.
Not only is being efficient the responsible way to design, but it alsoand I dont much care if somehting is a power hog, I'm not looking to conserve electricity here, although excess heat is somewhat of a consideration,
You need to experiment with your motor. Read about the idealI looked up pwm, and how would I calculate how many Hz to pulse it at to get 250 rpm? This is a good website for dc motor speed control. I dont understand that much of it but maybe you can. http://www.robotroom.com/PWM.html
Look for 555 PWM. I mention the 555 because it is cheap,Ok, so should I build a circuit like the one on the link provided, get a motor, and hook it up and play around with it? Also, what are the chances of finding a 25orpm motor?
Ahh gearmotors, that is a whole different ball of wax. The motor runsOk, I think I will, but more just for kicks, because I just found a 120rpm 12vdc 38mA gearmotor, it is small and will fit perfectly, aslo it is only about $13, and is closer to the speed I was looking for anyways. Or wuld that produce too much heat.
Build it and see.Also, is this a good 55 pwm cicuit? http://www.dprg.org/tutorials/2005-11a/index.html
It is good that you are tracking your power budget.the running total is 183mA plus whatever the cicuit itself(including what the relay uses.)