I'm looking to have two very small circuit boards designed of which I'll need, of course, the Gerber file, as well as the parts list (and anything else you can think of that I would need to submit to a circuit board printing company and other info needed to assemble the boards). But here's what I have.
The power source will be a 3.7 volt high drain battery, (fully charged around [url removed, login to view]), but I need the voltage out to be 3.42v. The first circuit will consist of, stepping the voltage down to [url removed, login to view] output, along with, a touch sensor activator. I purchased some stainless steel dowel (3/8"L x 3/16"D) that I was going to attach to the touch sensor manually, but I'm not committed to that. If you know of a touch sensor button that is around 1/4", that either lights up when pressed against, or not, (but preferably does), then that's ok too! The object that it's going to be placed in is round in shape, which was why I went with the dowels because even if they stick out a little bit due to something flat protruding from something round, it wouldn't expose any of the circuitry. But also, I need it to only function when it is touched directly, and not through dielectrics of any sort if possible. This isn't proximity, this is to be direct contact, again, if possible (meaning, not through clothes, if I have it in my pocket I don't want it to cut on if I touch the button). So this will have, a [url removed, login to view] coming in, with the 3.42v+ going out, to be connected to the device, and triggered by the 1/4" round touch sensor. It will also need on/off capabilities such as, if the touch sensor is pressed 5 times within 2.5 seconds, the LED/LCD voltage indicator (in next paragraph) will blink three times to let the user know the device is in on/off mode. I don't know if this is standard in circuitry or not, but it will also need short circuit protection, with the LCD/LED blinking 3 times when the button is pressed, not functioning until the short is corrected. So that's the first part. Am hoping to get this as absolutely small as possible, thinking 10mm x 10mm range but whatever is necessary with "as small as possible" in mind. Thin is also a plus. If these can be done on a single side of a PCB that would be excellent.
Next to it, (but separately) will sit a small (preferably) 4 or 5 bar blue LCD or LED display that indicates battery life remaining. (Think, kind of like a cell phone bar display, but with blue as the backlighting color and white as the segment color, if possible). Hoping for something around the 10mm in length and 8mm in height range (as far as the PCB goes), but nothing greater than that. A little smaller (if possible) is ok so long as it's readable without a magnifying glass, which is why I left that open to either LED or LCD. Whichever one is easier to use to achieve the task at hand. The reason for these being separate is, I'm going to have to join them by wire, and they'll be positioned separately and set in an epoxy mold, so I need the flexibility of being able to arrange them as needed while at the same time, keeping the boards as absolutely small as possible.
When the device is in "on" mode, and the button is touched and held, the device will stay on a maximum of 10 seconds, at which point the indicator will blink three times, and the circuit will rest until the finger is removed from the touch sensor and placed on it again. That is an important detail I left out. My apologies. But with that said, that is infact everything I need these circuits to do. How the wiring is done, I don't know, but the two PCB's should not exceed 10mmx10mm, and if possible, PCB2 (the PCB that contains the voltage indicator bar display) should be as close to 10mm W x 8mm H as possible or smaller. If any additional information is needed please let me know.
For example. I REALLLLLY like this style of button: (http://coldtears.lin3.siteonlinetest.com/files/QT1011-2.jpg)
However, in the picture, the button is square. I need mine to be round, and to be thicker. If it is mounted directly to the PCB components, I need it to be 3/8" long. If the button is stand-alone and merely wired to PCB1, then it can be 1/4" in thickness.
Hopefully this will be the last note I have to add but I don't think I've been as clear as I should be about the touch sensor dimensions.
I need it to be 1/4" in diameter.
The thickness will depend on how it functions. If it is mounted TO the PCB, it will have to be 3/8" thick. If it is stand-alone and wired to the PCB, it can be 1/4" thick.
But whichever one it is, it will have to be 1/4" diameter.
Ok I lied, hopefully THIS will be the last note, haha.
When the touch sensor is released, it will also go into rest-mode awaiting another touch. The touch sensor will FUNCTION as a standard press button, but without the obvious moving parts. While the button is pressed, the device sends 3.42 volts out until the button is let go, or 10 seconds has passed, whichever is shorter, but not to exceed 10 seconds without requiring the finger to be lifted and a new press to begin.
And I was talking with one of the bidders. This is something that, I will need parts that already exist so that I can get a parts list and buy them multiple times. If this requires me to be more flexible with what is available, I understand. But as close to what I have described would be excellent!
Voltage bars (display bars), is to be displayed 'while' the touch sensor is being pressed, displaying remaining battery life. When the button is released, the display should also cut-off. Preferably fade in when in use, and fade out when sensor is released, (which I'm sure is done with some kind of capacitor(s) but I'm not the electrical engineer here haha).
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hi, i have read your project detail twice but still it is very vague. please put your concept in an illustation for better understanding. theh i can provide the exact quote.