Measuring Voltage with Ammeter: The Art of Adding a Multiplier Resistor (019e)

You have an analog ammeter in your hand and you want to be able to measure voltage with it. In this video you will learn how to create a home grown, voltmeter from that ammeter by adding a multiplier resistor. I will step you through the process from the beginning to end using my own 100 microamp meter as the guinea pig. I will create a 10 Volt full-scale meter out of it. My end product agrees with my DVM dead on! Here is the link to the formula sheet: https://drive.google.com/file/d/17pXo... ---------------------------- Time Marker Notes 00:05 Introductions 00:45 Reading an Analog Meter Accurately 00:57 Selecting Your Ammeter 02:37 Calculate Ohms/Volt for Your Selected Meter 03:16 Characterize Your Meter 03:35 Introduction to the Meter Used in My Demonstration 04:49 Calculations: Full-Scale Voltage of the Ammeter 05:26 Goal: Voltage Divider with Ammeter as the Output 06:41 CALCULATE: Multiplier Resistor - Foundations 07:57 CALCULATE: Multiplier Resistor - Final Equation 08:49 CALCULATE: Multiplier Resistor Power Dissipation 09:21 SPECIFICATION: Resistor Working Voltage 10:02 SOLUTION TOPOLOGY 10:18 Fixed Resistors ... Series & Parallel 11:03 Use a Potentiometer 12:01 Potentiometer + Fixed Resistor 12:28 CALCULATION: Fixed Resistor & Potentiometer 15:04 SELECTION: Actual Part Selection of Off the Shelf Parts 17:00 SELECTION: HOME GROWN SOLUTION 17:33 ASSEMBLY: Preparation 18:12 INITIAL ADJUSTMENT 18:56 CONNECTION & TEST 19:10 ZERO Your Meter First 19:15 TESTING: What we need 19:40 TESTING: Preparation 20:02 TESTING: Connections 20:57 TESTING: The Actual Process, Ammeter to Full-Scale 22:00 ADJUSTMENT: DVM to Target, Adjust for Meter Full-Scale 23:02 Comments about accuracy 23:30 Final Comments and toodle-oots -----------------------------