Introduction

CAI-221 is a LED Dimming Table Lamp DIY Kit. Its design inspiration comes from the desk lamp commonly used in home/office. It uses 24 pure white LED and adjusts the brightness of the lamp through a potentiometer. It is ideal for personal desktop lighting. It is a very interesting DIY electronic product which enables users to understand the circuit more clearly and learn soldering skills.

Priced at $29.99, it includes all necessary components, such as LED strips and a dimmer switch, making assembly straightforward. Manufactured by icstation, the CAI-221 combines functionality and creativity, providing a stylish addition to any home or workspace.

Parameter

Item name:
- CAI-221 LED Dimming Table Lamp DIY Kit
Model:
- CAI-221
Work voltage:
- DC 3.7V-5V
Work current:
- 1.7A
Work power:
- 8.5W
LED color temperature:
- 6000-8000K
Luminance:
- 20-1000LUX
Brightness Adjustable:
- 0%-100% PWM
Turn ON/OFF Lamp:
- Yes
18650 Battery:
- 1200mAh
Housing material:
- Metal +ABS
Work Temperature:
- -20℃~85℃
Work Humidity:
- 5%~95%RH
Size(Installed):
- 120*90*350mm

Feature

PWM Adjustable Brightness. It uses PWM technology to achieve 0% – 100%seamless and smooth adjustment of brightness by adjusting the pulse width of PWM signal to 0% – 100%. It also can turn OFF lamp by potentiometer.
Pure White LED. It uses 24 pure white LED and adjusts the brightness of the lamp. The lamp board is separated from the main control board.
Flexible Lamppost. It adopts a 28cm flexible lamp post and users can adjust the light angle and height according to your own needs.
Rechargeable circuit. It comes with a 18650 lithium battery charging module. It is convenient for table lamp to realize wire-free application and charging.
DIY Hand Soldering. It’s a DIY kit which comes with various components. User need to install each component by hand. It not only can exercise and improve soldering skills, but also increase the interest in electronic technology. Great for electronics hobbyists, beginners, school and home education.

Component listing

NO.	Component Name	PCB Marker	Parameter	QTY
1	Ceramic Capacitor	C5	0.001uF 102	1
2	Ceramic Capacitor	C1,C3,C4	0.1uF 104	3
3	Electrolytic Capacitor	C2	100uF	1
4	Metal Film Resistor	R1,R2	200ohm	2
5	Metal Film Resistor	R3,R4	10Kohm	2
6	IN4148 Diode	D1,D2	DO-35	2
7	ALJ2302 MOS-N	Q1	TO-92	1

8	Potentiometer	RP1	50Kohm	1
9	PH2.0-5P Socket	P2	Bend Pin	1
10	PH2.0-5P Socket	P3	Straight	1
11	Micro USB 2Pin	USB	SMD	1
12	IC Socket	U2	DIP-8	1
13	NE555 Board	U2		1
14	Male Pin	U2	8Pin	1
15	Knob Cap			1
16	PH2.0-5P Wire		10cm	1
17	0.5W White LED		5mm	24
18	PA1.7*7 Self Tapping Screw			10
19	PA1.7*5 Self Tapping Screw			4
20	Potentiometer Nut			1
21	Red/Black Wire		20cm	1
22	USB Wire		100cm	1
23	Main PCB			1
24	LED Board			1
25	Battery Charging Module			1
26	PH2.0-2P Socket		Bend Pin	1
27	Male Pin	P1	3Pin	1
28	18650 Lithium Battery		1200mAh	1
29	Table Lamp Case			4
Note:Users can complete installation according to PCB silk screen and component list.

Description

You can put together a completely working LED table light with the help of the icstation LED Dimming Table light Kit CAI-221. A printed circuit board (PCB), surface-mount diodes (SMDs), dimmer switch, power source module, and other required components for assembly are all part of the package. It would be a chic complement to any decor thanks to its contemporary style. Users may change the brightness to their liking, whether it's for reading, working, or general illumination, thanks to the adjustable dimming feature.
The lamp's sturdy build guarantees years of reliable service. Even those without prior experience assembling such kits can benefit from the comprehensive instructions and diagrams included with the product.

Installation

User needs to prepare the soldering tool at first.
- Soldering iron (<50 Watt)
- Rosin core (“radio”) solder
- Wire cutters
- Wire strippers
- Philips screwdriver
Please be patient until the installation is complete.
The package is DIY kit.It need finish install by user.
The soldering iron can’t touch components for a long time(1.0s), otherwise
damage components.
Pay attention to the positive and negative of the components.
Strictly prohibit short circuit.
Install complex components preferentially.
Make sure all components are in right direction and right place.
Please wear anti-static gloves or anti-static wristbands when installing electronic components.
It is strongly recommended to read the installation manual before starting installation!!!

Installation Steps (Please be patient install!!!)

Step 1: Install 2pcs DO-35 IN4148 Diode at . Pay attention to the installation direction. There is a black mark on 1N4148 and a white mark on PCB which are used to confirm the installation direction.
Step 2: Install 2pcs 200ohm Metal Film Resistor at R1,R2.
Step 3: Install 2pcs 10Kohm Metal Film Resistor at R3,R4.
Step 4: Install 1pcs 0.001uF 102 Ceramic Capacitor at C5.
Step 5: Install 3pcs 0.1uF 104 Ceramic Capacitor at C1,C3,C4.
Step 6: Install 1pcs SMD Micro USB 2Pin at USB.
Step 7: Cut 1pcs 8Pin Male Pin to 2pcs 4Pin Male Pin. Then install them on U2. Note that the longer pin faces up.
Step 8: Install 1pcs NE555 Board on 4Pin Male Pin. There is a mark(curved silk screen printing) on NE555 Board and there is a mark(curved silk screen printing) on PCB. These two marks are corresponding to each other and are used to specify the installation direction.
Step 9: Install 1pcs Bend Pin PH2.0-5P Socket at P2.
Step 10: Install 1pcs Straight Pin PH2.0-5P Socket at P3.
Step 11: Install 1pcs TO-92 ALJ2302 MOS-N at Q1. Note that the arc of ALJ2302 corresponds to the arc silk screen on the PCB.
Step 12: Install 1pcs 100uF Electrolytic Capacitor at C2. There is a white ‘ + ’ on PCB silk screen printing where the positive(anode) can insert into. The longer lead is positive(anode)
Step 13: Install 1pcs 3Pin Male Pin at P1. It needs short pads P0 if the Battery Charging Module does not need to be installed.
Step 14: Install 1pcs 50Kohm Potentiometer at RP1.
Step 15: Install 1pcs Bend Pin PH2.0-2P Socket on Battery Charging Module. Note: If your battery has no interface, you can connect it directly with wires without installing PH2.0-2P Socket.
Step 16: Install 1pcs Battery Charging Module on P1.
Step 17: Release potentiometer adjusting plate. It is recommended to use scissors or pliers to break PCB connection points.
Step 18: Identify the positive(anode) and negative(cathode) lead of LED.The leads of the LED must be installed correctly, otherwise the LED cannot be turned on.
Here are four methods as following:
- According to the length of the LED lead to distinguish. The longer pin is positive(anode) lead. The shorter pin is negative(cathode) lead.
- Identify the negative(cathode) of the LED is to look into the plastic case where one can see that the negative(cathode) is much thicker/bigger inside the plastic case than the anode lead.
- Identify by edge of plastic case. The negative(cathode) lead of the LED should be the pin nearest the flat on the plastic case.
- Test by 3V battery or multimeter. The pin is positive(anode) lead which has connect to the positive of 3V if LED can light up after connect 3V power supply.(LED should not be powered directly from the 3V for a short time:less then 0.5second)
- It is positive(anode) where the white mark “ + ” pointing to on PCB.
Step 19: Step Install 24pcs 5mm 0.5W White LED on LED Board. Pay attention to distinguish between positive and negative pole.
Step 20: Fix 20cm Red/Black Wire on LED Board. Red connect to “ LED+ ” pad and black connect to “ LED- ” pad.
Step 21: The other end of the wire is inserted through the top of the lamp post.Be careful not to push too fast.
Step 22: Adjust the position of the LED lamp panel and prepare the lamp shade.Pay attention to the direction of the lampshade.
Step 23: Fix lamp shade by 4pcs PA1.7*7 Self Tapping Screw.
Step 24: Connect main PCB and Potentiometer Board by 10cm PH2.0-5P Wire.
Step 25: Fix main PCB on bottom plate by 4pcs PA1.7*5 Self Tapping Screw.
Step 26: Pass the wire through the central hole of the bottom plate.
Step 27: Fix lamp post on bottom plate by 2pcs PA1.7*7 Self Tapping Screw.
Step 28: Fix 20cm Red/Black Wire on Main Board at P4. Red connect to “ LED+ ” pad and black connect to “ LED- ” pad.
Step 29: Connect 18650 Lithium Battery. Note: If your battery has no interface, you can connect it directly with wires.
Step 30: Fix Potentiometer Board by nut. Note that the fixing point of the potentiometer is aligned with the hole of the housing.
Step 31: Fix case by 4pcs PA1.7*5 Self Tapping Screw.
Step 32: Install Knob Cap on Potentiometer. Rotate potentiometer to change the light brightness.

Setup Guide

In order to put together the CAI-221 LED Dimming Table Lamp Kit from icstation, please follow these instructions:

Take the kit apart and check that everything is there.
Use the screws and fittings that included with the kit to put together the base and the column.
Read the instructions carefully before soldering the LEDs to the PCB.
Follow the instructions to install the power source module and dimmer switch.
Fasten all components together to complete the assembly.
Turn on the light, or put in the batteries (if that's an option), and see how it dims.

You can expect the whole thing to take anywhere from thirty to sixty minutes, give or take depending on your skill level.

Schematic Diagram

Lamps-CAI-221-LED-Dimming-Table-Lamp-DIY-Kit-FIG-1

Lamps-CAI-221-LED-Dimming-Table-Lamp-DIY-Kit-FIG-2

Application

Practical at home
Indoor display
Simple appearance, easy office
Wall decoration
Training welding skills
Student school
DIY production
Project Design
Electronic competition

Troubleshooting

You can find answers to typical difficulties that may arise during or after construction by following these steps:

If there is no light coming out, make sure the power cord is in the right way. Verify that the PCB board has all of the wires firmly fastened.
Check for loose connections and proper installation of the dimmer switch.

When dealing with electrical components, always adhere to all safety protocols.

Icstation LED Dimming Table Lamp Kit CAI-221 Pros & Cons

Pros

You may customize the illumination to your liking with the adjustable dimming option.

Cons

Just two color temperatures, warm white and cold white, are offered.

Customer Reviews

Customers have expressed their satisfaction with the Icstation LED Dimming Table Lamp Kit CAI-221 due to its user-friendly installation process and its ability to effectively dim the light. Many have appreciated the detailed instructions and the overall quality of the components. On the other hand, a few reviewers have pointed out that putting it all together could take a while, and that anyone without much DIY knowledge may need to be patient.
Some buyers have complained that weak connections have caused their lights to flicker on and off. Some have pointed out that the lamp's base needs additional support to keep it from falling over.

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