91A1A-B20-B20L

Rotary Potentiometers and Rheostats

A 91A1A-B20-B20L rotary potentiometer or rheostat is a device that is designed to regulate and control the flow of electric current. It is typically used to either increase or decrease the voltage going to a particular circuit or component, allowing it to compute more accurately than with an ordinary (linear) rheostat.The 91A1A-B20-B20L has two adjustable components - one is a variable resistor, and the other is a mechanical switch, combined in one compact housing. The adjustable resistor is what actually controls the voltage. The switch provides a means to open or short the connection.The 91A1A-B20-B20L is a particularly useful rotary potentiometer because it can be used to increase or decrease voltage in a circuit without having to physically open or close anything. With the switch turned on, more voltage than requested is sent through the circuit. With the switch turned off, a lower voltage than requested is sent through the circuit. Thus, it can be used to regulate the voltage sent to a particular component or circuit.The 91A1A-B20-B20L is commonly used in a variety of applications, including automotive electronics, test equipment, medical applications, and even some musical instruments. It is often used to control elements such as power levels, trim pots, bias currents, and temperature. In some cases, it can even be used to control motors, solenoids, and light bulbs.In order to use a 91A1A-B20-B20L, it must first be properly calibrated. This involves adjusting the gap between two contact plates of the resistance element of the device to the desired voltage. The amount of resistance can then be adjusted, which is used to regulate the amount of voltage that should be sent through the circuit.The 91A1A-B20-B20L is an effective and efficient way to regulate and control the current in a circuit or component. It can be used to either increase or decrease the voltage that is sent through a circuit, and it can be used to control elements such as power levels, temperature, and trim pots. The device is commonly used in a variety of applications, including automotive, medical, and musical instruments.