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| diff --git a/doc/easymini-device.inc b/doc/easymini-device.inc new file mode 100644 index 00000000..fb2b6098 --- /dev/null +++ b/doc/easymini-device.inc @@ -0,0 +1,116 @@ +== EasyMini + +	.EasyMini Board +	image::easymini-top.jpg[width="5.5in"] + +	EasyMini is built on a 0.8 inch by 1½ inch circuit board. It's +	designed to fit in a 24mm coupler tube. + +	You usually don't need to configure EasyMini at all; it's set +	up to do dual-deployment with an event at apogee to separate +	the airframe and deploy a drogue and another event at 250m +	(820ft) to deploy the main. Install EasyMini in your airframe, +	hook up a battery, igniters and a power switch and you're +	ready to fly. + +	=== EasyMini Screw Terminals +	 +		EasyMini has two sets of four screw terminals near one end of the +		board. Using the picture +		above, the top four have connections for the main pyro +		circuit and an external battery and the bottom four have +		connections for the apogee pyro circuit and the power +		switch. Counting from the left, the connections are as follows: + +		.EasyMini Screw Terminals +		[options="header",grid="all",cols="2,3,10"] +		|==== +		|Terminal #|Terminal Name|Description +		|Top 1 +		|Main - +		|Main pyro channel connection to pyro circuit +	       +		|Top 2 +		|Main + +		|Main pyro channel common connection to battery + +	       +		|Top 3 +		|Battery + +		|Positive external battery terminal +	       +		|Top 4 +		|Battery - +		|Negative external battery terminal +	       +		|Bottom 1 +		|Apogee - +		|Apogee pyro channel connection to pyro circuit +	       +		|Bottom 2 +		|Apogee + +		|Apogee pyro channel common connection to battery + +	       +		|Bottom 3 +		|Switch Output +		|Switch connection to flight computer +	       +		|Bottom 4 +		|Switch Input +		|Switch connection to positive battery terminal +		|==== + +	=== Connecting A Battery To EasyMini + +		There are two possible battery connections on +		EasyMini. You can use either method; both feed +		through the power switch terminals. + +		One battery connection is the standard Altus Metrum +		white JST plug. This mates with single-cell Lithium +		Polymer batteries sold by Altus Metrum. + +		The other is a pair of screw terminals marked 'Battery +		+' and 'Battery -'. Connect a battery from 4 to 12 +		volts to these terminals, being careful to match polarity. + +	=== Charging Lithium Batteries + +		Because EasyMini allows for batteries other than the +		standard Altus Metrum Lithium Polymer cells, it cannot +		incorporate a battery charger circuit. Therefore, when +		using a Litium Polymer cell, you'll need an external +		charger. These are available from Altus Metrum, or +		from Spark Fun. + +      	=== Using a Separate Pyro Battery with EasyMini +	 +		As described above, using an external pyro battery involves +		connecting the negative battery terminal to the flight +		computer ground, connecting the positive battery terminal to +		one of the igniter leads and connecting the other igniter +		lead to the per-channel pyro circuit connection. + +		To connect the negative pyro battery terminal to EasyMini +		ground, connect it to the negative external battery +		connection, top terminal 4. + +		Connecting the positive battery terminal to the pyro +		charges must be done separate from EasyMini, by soldering +		them together or using some other connector. + +		The other lead from each pyro charge is then inserted into +		the appropriate per-pyro channel screw terminal (top +		terminal 1 for the Main charge, bottom terminal 1 for the +		Apogee charge). + +      	=== Using an Active Switch with EasyMini +	 +		As explained above, an external active switch requires three +		connections, one to the positive battery terminal, one to +		the flight computer positive input and one to ground. Use +		the negative external battery connection, top terminal 4 for +		ground. + +		The positive battery terminal is available on bottom +		terminal 4, the positive flight computer input is on the +		bottom terminal 3. | 
