Minor fixes (paragraphs 15, 16, 28, 39, 47, 57)

RibbonFish.md

@@ -0,0 +1,93 @@
+# RibbonFish Proof-of-Concept
+
+Using the principle of Agile development, we are building a quick-dirty proof-of-concept codenamed RibbonFish.
+
+The RibbonFish is a low-temperature (less than 100C) model consisting of two heating cloths and 12V fan, controlled with three simple thermocouples.
+Although weak compared to the goal-product, this allows us to exercise much of the functionality that we will
+eventually need.
+
+## Hardware Choices
+
+Because the RibbonFish is a real machine, it forces us to make hardware pin choices for the Arduino to
+control the 6 hardware electronic devices. These choices are documented here to allow duplication
+of the device; the hardware choices (GPIO pins) must match the software configuration.
+
+1. The thermocouples are DS18B20 Temperatures sensors purchased from Adafruit, and configured using the [OneWire digital
+protocol](https://learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing/ds18b20) We use Digital Pin 2 as the signal pin for this.
+3. The Fan and Heaters #1 and #2  are controlled via PWM (ranging from 0-12V.) The pins are: Fan = PIN 3, Heater #1 (Preheater) = PIN 4, Heater #2 (stack simulation) = PIN 5
+
+The Fan is a simple DC 12 Vote Fan that fits inside a 4" PVC pipe. The heaters are Adafruit 4" x 5"  heating cloths, around 1 ohm each.
+
+Note: We do not believe an unfiltered PWM signal is appropriate for the actual chemical stacks due to internal chemistry,
+or at least this has not yet been tested. However, as a prelude to a real system, PWM can be used with the heating cloth
+using simple power transistors.
+
+## Photo of the RibbonFish
+
+The Ribbon Fish consists of a PVC vent fan (12V, inline) connected via a heavy paper cone to piece of 3/4" PVC piping.
+There are 3 such pipe segments, each about 16mm long. These each have a 1/4" hole for the temperature sensor in the middle.
+In the two joints between the three pipes, a heating cloth is rolled up into a cylinder and inserted into both pipes.
+The leads are exposed to power the heating cloths.
+
+![IMG-2837](https://user-images.githubusercontent.com/5296671/179431945-5230cd6c-c835-47c4-acae-b7c6fa9ac5d0.JPG)
+
+## Libraries
+
+PlatformIO provides useful package and configuration management, but
+it still requires thought and documentation.
+
+We believe the DS18B20 thermometers require these libraries
+
+> pio lib install paulstoffregen/OneWire
+> pio lib install milesburton/DallasTemperature
+
+
+## Simple Commands for the RibbonFish
+
+In order to continue moving to more verisimilitude, we need to implement a serial-port based
+command structure within the RibbonFish.  Without being ready to specify everything,
+let me describe a few commands.
+
+### Parameter Commands
+
+The first commands for the Ribbon Fish are:
+
+1. W - Warmup
+2. C - Cool Down
+3. Set exhaust temperature than (first or second) heater
+4. Set the speed of the fan
+
+The command set the target temperatures for the first and second heater
+```JavaScript
+{ "com": "T",
+  "par": 0,
+  "mod": "T",
+  "val" : 34.3
+  }
+```
+
+```JavaScript
+{ "com": "T",
+  "par": 1,
+  "mod": "T",
+  "val" : 36.0
+  }
+```
+
+This command says enter the cool down mode:
+```JavaScript
+{ "com": "C",
+  "par": 0,
+  "mod": "U",
+  "val" : 0.0
+  }
+```
+
+This command says enter the warm up mode:
+```JavaScript
+{ "com": "W",
+  "par": 0,
+  "mod": "U",
+  "val" : 0.0
+  }
+```