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I would suggest that your first step, before buying any microcontrollers or other hardware, would be to get hold of whatever phone you're going to use, and try to connect to it using your computer.
For this you'll need a cable of some sort, or to solder to whatever internal contacts the phone...
I think what you are trying to do is possible. A few points:
You will almost certainly need a microcontroller of some sort, especially if you want to use an RC servo which needs a PWM (Pulse Width Modulation) signal.
Most phones run off a single cell lithium-ion battery. These provide between...
The standard way of doing this is to have a chime/buzzer when the lights are on and the door is opened. Perhaps if your machine doesn't have doors, or doesn't have a door switch, you could cause the buzzer/chime to operate if the engine is off and the lights are still on. That way it's harder to...
You can look at a Thermoelectric generator - they work on the peltier principle like some active CPU coolers, only in reverse. You can find them on **broken link removed**, among other places. People have used them to build **broken link removed**.
Note that they need a temperature difference...
It would help to know what you're trying to achieve here.
Why do you need this doubled output voltage?
What do you want to drive with it?
How much current do you need to supply at the doubled voltage?
Your schematic shows a 10V supply to your op-amps. Do you already have a 10V supply to your...
If you do use a 12V lead acid, don't do what I did! I just connected the lead-acid in parallel with the router's 12V power supply (because it was a 12V battery), expecting that the router power supply would slowly charge it, and when the power died, the battery would discharge and power the...
I would expect in a 6s2p pack that the cells would be connected in pairs, in parallel, with 6 pairs making up the pack. Thus, each pair of cells can be treated as a single cell with double the capacity, and balanced with a single balancing wire. So having a 6-way balance plug would seem likely...
In general, the current ratings (e.g. 2.5A) on devices are the maximum current the device will ever need to draw. As long as you match the voltages, it doesn't matter if the supply (in this case your battery) can supply more current - the device will not draw current unless it needs it.
Also, I...
I'm not sure you will achieve 2-3km range with PLC devices, which are typically designed for use within a house.
Also, these PLC modules cause a large amount of interference to many devices which use radio, as power lines were never designed to carry high data rates and so much of the energy is...
Even then, if the battery becomes discharged below 12.5V, the regulator will drop out of regulation and the output will fall.
What is it that you want to run from this circuit? Are you just trying to ensure that it doesn't receive a voltage above 12V? Will it tolerate a range of input voltages...
What are you using as the input to the LM7812?
If you are using an unregulated 12V supply as the input, it will not work, as the input to the LM7812 needs to be ~2V higher than the output to achieve stable regulation - so you'd need a 14V or higher unregulated input.
I'm kinda trying to keep the parts count down as space is limited, so adding an extra dc supply would be difficult. Do you have a recommendation for a small device that can do this?
The reason for the 100% duty cycle requirement is that this is to be a buck/boost h-bridge. As such, there will...
Hi all,
First-time poster here, please be gentle! I'm looking for a device which I suspect has gone out of fashion.
I want to build a synchronous-rectifier DC-DC switcher which can go to 100% duty cycle (DC). I will need a gate driver chip for the mosfets, as I want to use quite a high PWM...
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