1. Potentiometer
Potentiometer or voltage divider, which is a three-port device. The potentiometer is divided into two resistors by the middle tap, and the voltage divided can be changed by changing the resistance of the two resistors through the middle tap.
2. Rheostat
Rheostat, in fact, is a potentiometer, the only difference is that the rheostat only needs to use two ports, purely a resistor that can be precisely adjusted resistance value.
3. Trimmer
Trimmer, in fact, is also a potentiometer, except that it does not need to be adjusted often, for example, the equipment can be adjusted when the factory, usually need to use a screwdriver and other special tools to adjust.
Sensitive resistors are a class of sensitive components, most of these resistors are particularly sensitive to a certain physical conditions, the physical conditions of a change, the resistance value will change, usually used as sensors, such as light-sensitive resistors, moisture-sensitive resistors, magnetic resistors and so on. In the circuit design of more applications should be thermistors and varistors, commonly used as protection devices.
Thermistor, PTC thermistor, the full English is Positive Temperature Coefficient CoeffiCient, translated is positive temperature coefficient thermistor, the product characteristics of the performance of the temperature increases, the resistance is a positive coefficient becomes larger. NTC thermistor, the full English is Negative Temperature CoeffiCient, the product characteristics show that as the temperature rises, the resistance is positive coefficient becomes smaller.
Voltage Sensitive Resistors are usually Metal Oxide Varistors (MOV), the resistor material is a mixture of Zinc Oxide particles and ceramic particles sintered together.The characteristic of MOV is that when the voltage exceeds a certain threshold, the resistance drops rapidly, and it can pass large currents, so it can be used for surge protection and over-voltage protection.
Zinc oxide ceramics are made into multilayer type varistors, or MLVs, using a process similar to that used for MLCCs. MLVs come in smaller packages, usually in chip form, and have a much smaller voltage rating and current throughput capacity than MOVs, making them suitable for low-voltage DC applications.
Let Me introduce our NeoDen10 pick and place machine
1. Front and rear with 2 fourth generation high speed flying camera recognition systems, US ON sensors, 28mm industrial lens, for flying shots and high accuracy recognition.
2. 8 independent heads with fully closed-loop control system support all 8mm feeder pick up simultaneously, speed up to 13,000 CPH.
3. Support up to 4 pallet tray of chips (optional configuration), larger range and more option.
4. Raise PCB automatically, keeps PCB on the same surface level during placement, ensure high accuracy.
5. Support 1.5M LED light bar placement (optional configuration).
6. The magnetic linear encoder system real-time monitor the machine's accuracy and enables machine to correct error parameter automatically.