Supparat 's Blog: 2025

Monday, February 24, 2025

นาฬิกาแขวนผนัง ถ่าน 18650

ใช้ถ่าน 18650 แทนถ่าน aaa

เนื่องจากถ่านหมดไวมาก

ใช้ bms ร่วมกับ ตัวต้านทาน และ ทรทนซิสเตอร และ ตัวเก้บประจุ

Friday, February 21, 2025

เครื่องเจีย 4 นิ้วไร้สาย

เครื่องเจียเสียนิ้วไร้สาย Tanzu

ราคา 1498 แบต 2ก้แน ก้อนละ 10 ก้อน 1865

Thursday, February 20, 2025

Step Up XL4016 8A

Adjustable Step-Down Power Module 8A 24V to 12V LED Driver Constant Current Charge 7-40V to 1.2-35V DC Converter

Featrure:

Module Properties: non-isolated step-down module (Buck) Constant current, constant voltage module (CC CV) charging module
Input voltage :DC 7-40V
Output voltage: DC 1.2-35V (adjustable)
Output Current: 8A-9A ( when power tube's temperature exceeds 65 degrees, please add cooling fan )
Turn lamp current : constant current value * ( 0.1 ) , turn the lamp current and constant value linkage, such as constant current value is 3A, turn the lamp current is set to a constant current is 0.1 times (0.1 * 3A = 0.3A).
Output power: maximum power of about 300W, power tube temperature exceeds 65 degrees please add fan.
Conversion efficiency: 95% (the higher the voltage, the higher the efficiency)
Output Ripple: 20M-bandwidth Input 24V Output 12V 5A ripple around 50mV (excluding noise)
Operating Temperature: Industrial (-40°c to +85°c) The actual use of note power tube temperature, high temperature and please strengthen heat)
Full load temperature rise: 45°c
No-load current: 20mA typical (24V to 12V)
Voltage regulation: ± 1%
Load regulation: ± 1% (constant voltage)
Dynamic response speed: 5% 200uS
Dimensions: 65 x 47x 23.5 mm
Short circuit protection: Yes
Input Reverse Polarity Protection: None (Please Series diode at the input port.)
lowest differential pressure: 1V
Operating frequency: 180KHZ
precision of constant current and temperature: the actual test, module temperature from 25 degrees to 60 degrees, the constant current value is less than 5% (constant current value 5A)
dynamic response speed: 5% 200uS
Potentiometer adjustment direction: clockwise, counterclockwise (increased) (reduced) close to the input potentiometer for voltage regulation (CV), close to the output of the potentiometer is current regulator (CC)
Indicator: the double color indicating lamp, light red charging, after charging indicator green (no load of green)
Input reverse connection protection: No,
Output to prevent reflux: No.
Connection: connecting terminal

Scope of application:

high power LED constant current drive, rechargeable lithium batteries (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery, NiCd and NiMH batteries (battery) charge, solar panels, wind generators

Battery charging method:

1 determine the float voltage you need to charge the battery and charging current, input voltage module;

2 adjustable constant potentiometer, the output voltage is regulated to 5V.

3 multimeter 10A current block measurement output short circuit current, and adjusting the constant current charging current potentiometer output current reaches a predetermined value;

4 adjustable constant potentiometer to the output voltage to the floating charge voltage;

5 battery charging, test.

(1, 2, 3, 4 steps for the module input power, output no-load not connected with the battery.)

LED constant current driving method:

1 to determine the current you need to drive LED and maximum working voltage;

2 adjustable constant potentiometer, the output voltage is regulated to 5V.

3 multimeter 10A current block measurement output short circuit current, while regulating constant current potentiometer output current up to LED working current of a predetermined;

4 adjustable constant potentiometer to the output voltage to the LED maximum working voltage;

5 connected to the LED, the test machine.