Changes between Version 1 and Version 2 of ElectricalBasicTraining1

Timestamp:

Nov 12, 2017, 2:49:49 PM (8 years ago)

Author:

David Albert

Comment:

--

ElectricalBasicTraining1

@@ -4 +4 @@
 Objective: Understand Voltage, Current, Resistance, Multimeters, and how they all relate to robots
 Materials required for every 2 students:
-  * Multimeter
-  * 9v battery
-  * 2x Alligator jumper wires
-  * Brake light bulb
-  * DC motor
+  * [https://www.amazon.com/UNI-T-Digital-Multimeter-Frequency-Resistance/dp/B00AW6SHNO Multimeter]
+  * [https://www.amazon.com/gp/product/B00MH4QM1S 9v battery]
+  * [https://www.amazon.com/gp/product/B0739YWFQ6 2x Alligator jumper wires]
+  * [https://www.amazon.com/gp/product/B00E8S82S2 Brake light bulb]
+  * [https://www.amazon.com/1-5V-9V-7400RPM-Micro-Motor-RF-130CH-09520/dp/B00XBG15RM DC motor]
   * Pencil and sheet of paper
 Additional materials (only one of each needed)
-  * 12v robot battery
+  * [https://www.amazon.com/gp/product/B004ALBXLA 12v robot battery]
   * 1.5v battery (e.g. AA cell)
-  * Glass fuse
-  * Snap fuse (breaker)
-  * 120A main breaker with wires attached
-  * CIM Motor
-  * Glass fuse
+  * [https://www.aliexpress.com/item/50pcs-set-10Values-Fast-Quick-Blow-Glass-Tube-Fuses-Assortment-Kit-5x20mm-0-2A-0-5A/32661186842.html Glass fuse]
+  * [http://www.andymark.com/40-Amp-Snap-Action-Breaker-p/am-0288.htm Snap breaker]
+  * [http://www.andymark.com/120-amp-robot-main-circuit-breaker-p/am-0282.htm 120A main breaker] with 6 gauge wires attached
+  * [http://www.andymark.com/CIM-Motor-p/am-0255.htm CIM Motor]
 
 1. Batteries
@@ -100 +99 @@
 
 8. Resistance
-  * Show thick battery/main breaker wire, thinner CIM motor wire, thin signal wire (switches, CAN bus, etc.)
+  * Show thick (6 gauge) battery/main breaker wire, thinner (12-14 gauge) CIM motor wire, thin (18-22 gauge) signal wire (switches, CAN bus, etc.)
   * Explain that the thickness of the wire is mandated by FIRST for safety: the more current the wire must carry, the thicker the wire.
-    So the wire from the battery and main breaker which must carry all of the current used by all of the motors is thickest while the
-    wire to any one motor is not as thick but is still thicker than the wire used for the CAN bus or a limit switch where hardly any 
-    current is needed (because they are not doing any work).
+    Since the wire from the battery and main breaker must carry all of the current used by the entire robot, it is thickest while the
+    wire to any one motor must carry no more than 40A and so is thinner and the wire used for the CAN bus or limit switches/sensors 
+    where hardly any current is needed (because they are not doing any work) is thinnest.
   * Measure resistance:
      * Move multimeter red wire to hole with Omega symbol
@@ -125 +124 @@
 9. Robot Motors
   * Show CIM motor 
-  * Discuss free current (2.7A) and stall current (133A)
+  * Discuss free current (2.7A), typical max operating current (40A), and stall current (133A)
   * Recall how much heat the bulb generated with ~9W, calculate Watts at CIM stall current
   * Observe thicker motor wires to allow greater current without overheating