Digital Curve Tracer By E28BU

วันเสาร์ที่ 2 กันยายน พ.ศ. 2566

★ MC3357 Low Power Narrowband FM IF ★

★ MC3357 Low Power Narrowband FM IF ★

Low Power Narrowband FM IF

includes Oscillator, Mixer, Limiting Amplifier, Quadrature Discriminator, Active Filter, Squelch, Scan Control, and Mute Switch. The MC3357 is designed for use in FM dual conversion communications equipment.

• Low Drain Current (3.0 mA (Typical) @ VCC = 6.0 Vdc)

• Excellent Sensitivity: Input Limiting Voltage – (– 3.0 dB) = 5.0 µV (Typical)

• Low Number of External Parts Required

• Recommend MC3372 for Replacement/Upgrade

★ Pin Connections ★

★ Representative Block Diagram ★

★ Electrical Characteristics ★

★ Circuit Schematic ★

วันศุกร์ที่ 1 กันยายน พ.ศ. 2566

★HW-391 2S 20A 7.4V 8.4V Lithium Battery Protection Board 18650 BMS★

★HW-391 2S 20A 7.4V 8.4V Lithium Battery Protection Board 18650 BMS★

★ Product details ★

• Charging Voltage: DC 8.4-9V

• Version: Balance, Standard

• Continuous discharge current: maximum 20A (if heat dissipation environment is not good, please reduce the use of load current)

• Continuous charging current: maximum 10A

• Applicable Choice: For lithium batteries with nominal voltage of 3.7V and charge of 4.2V (including 18650 26650 and polymer lithium batteries) can start-up current 25A power less than 50W electric drill or 168W resistive load

★ Specification ★

• Charging voltage: DC8.4-9V

• Continuous discharge current: Maximum 20A (if the heat dissipation is not good, please reduce the load current to use)

• Continuous charging current: Maximum 10A

• Applicable options: Suitable for lithium batteries with a nominal voltage of 3.7V and a full charge of 4.2V (including 18650, 26650, polymer lithium batteries), with a starting current of 25A, power drills below 50W, or 168W resistive load.

• Product size: 48*20*3mm

• Product weight: 5g

• Packing size: 50*50*15mm

• Package weight: 5g

★ RFR 50-60 (50 Ohm/60 Watts)FLANGED POWER RESISTOR ★

★ RFR 50-60 (50 Ohm/60 Watts)FLANGED POWER RESISTOR ★

★ Features ★

• High power flanged resistors for all DC up to 4GHz applications.

• Small size and wide frequency range specifications realized with through large heat conducting AlN substrate.

• Sufficient mechanical strength metallization from spattered thin film technology.

• 50 Ohm 60 Watts resistance with tolerance 1%, and terminations include chips and many style flange provided as standard and other resistance and power available.

• Long life and temperature stability are shown by a result of Ni-Cr thin film technology.

• Applications include power absorption resistor, termination for isolator/circulators, base station of mobile communication electronics, High power microwave amplifiers.

★ Performance Specifications ★