DIY KIT 54- Sound activated LEDs
This is yet another sound activated LEDs circuit. I have previously published a similar project. (more…)
This is yet another sound activated LEDs circuit. I have previously published a similar project. (more…)
The description has been copied from manufacturer’s website.
This is a PIC microcontroller-based frequency meter, subtraction frequency is set with crystal measurement functions and programmable, five digital display, easy and intuitive, all using in-line components, the circuit is simple and easy to make.
Measurable frequency range: 1 Hz -50 MHz;
Most commonly used to measure the oscillation frequency of the crystal;
Five Accuracy Resolution (eg 0.0050 kHz, 4.5765 MHz, 11.059 MHz);
Automatic range switching, without artificial switching.
Modified programmable frequency settings for the measurement of radio transceivers and other equipment;
Selectable power-saving mode within 15 seconds if there is no significant change in the frequency automatically turn off the display;
You can use a common USB interface as a power supply, can also use an external power supply or 9V battery. (more…)
This is yet another project based on LM358. The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. (more…)
This is a basic electronic kit based on LM358. The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. (more…)
This is yet another dark sensor DIY kit. It is slightly different from other dark sensor kits. It has a buzzer and a photodiode that makes it different from other kits. Along with the LED, the kit turns on the buzzer whenever it senses darkness.
See all the images below to get the idea for assembly. You can see all the images on Flickr also.
This is yet another dark sensor circuit
One more dark sensor project
This is a basic electronic kit for beginners. The kit is based on LM358, an operational amplifier and works as a flame sensor.
The schematic of the kit:
Check out the images below to get tips for assembling the kit. You can see the images on Flickr also.
Other images
The description has been copied from eBay, so, really sorry for the bad English.
When S1 is pressed, U1 NE555 pin no. 2 and 4 will get low level at the same time and NE555’s pin no.3 will also be at low level, 7 pin discharges and 6 pin also gets low level.
If S1 is released, 4 pin will become high level, then pins 2 and 6 will get low level. Therefore, U1 NE555 output pin no. 3 will be high, Q2 is connected to it and the 4pcs LEDs on the left group will turn on. At the same time, Q3 is connected, U2 NE555 outputs low level and the LEDs on the right group will be off.
Work Status:
The controller can control the on/off of the red lamp, green lamp and yellow lamp from four directions.
When the red lamp on the east and west is on, the lamp on the south and north is on, and the cars and passers-by can go across the street;
when the lamp on the east and west is transforming into green from red and the lamp on the south and north is transforming into red from green, the yellow lamp will flash.
A great explanation of the kit is here:
Parameter:
NO. | Parameter | Value |
1 | Name | Traffic light DIY Kit |
2 | Operating Voltage | DC 4.5-5V |
3 | PCB Size | 90*46mm |
Component List:
NO. | Component Name | PCB Marker | Parameter | QTY |
1 | Electrolytic Capacitor | C1,C2 | 22uF/10-50V | 2 |
2 | Electrolytic Capacitor | C3,C4 | 10uF/10-50V | 2 |
3 | Electrolytic Capacitor | C5 | 1uF/10-50V | 1 |
4 | Rectifier diode | D1-D4 | 1N4001 | 4 |
5 | 2*5*7 LED | L3,L4,L7,L8 | Red | 4 |
6 | 2*5*7 LED | L1,L2,L5,L6 | Green | 4 |
7 | 2*5*7 LED | L9-L12 | Yellow | 4 |
8 | Transistor | Q1-Q5 | S8050 | 5 |
9 | Metal Film Resistor | R1,R2,R8,R14,R16 | 10K | 5 |
10 | Metal Film Resistor | R3,R4,R15 | 510K | 3 |
11 | Metal Film Resistor | R5,R6 | 1M | 2 |
12 | Metal Film Resistor | R7 | 100ohm | 1 |
13 | Metal Film Resistor | R9,R10,R11,R12,R13 | 1K | 5 |
14 | Button | S1 | 6*6*5mm | 1 |
15 | NE555 | U1-U3 | DIP-8 | 3 |
16 | CD4011 | U4 | DIP-14 | 1 |
17 | PCB | 90*46mm | 1 |
See all the images below to get the idea for assembling the kit. You can see the images on Flickr also.
More images of the kit
This is yet another metal detector kit for electronics beginners. After assembling the kit, if you take the kit close to a metal, the buzzer will turn on and the LED will flash. The sensitivity of the kit can be adjusted using the potentiometer.
NO. | Parameters | Value |
1 | Name | Metal detector |
2 | Operating voltage | DC 3-5V |
3 | Operating current | ≤ 40mA |
4 | Standby current | ≤ 5mA |
5 | Detection depth | ≤ 60mm |
6 | Detection and alarm mode | Sound and Light |
7 | The difficulty of soldering | Easy |
8 | Circuit board size | 86*61mm |
9 | Packing weight | 16g/kit |
Component list:
NO. | PCB Marker | Component Name | Parameter | QTY |
1 | R3 | RES | 470R | 1 |
2 | R2 | RES | 2K | 1 |
3 | R1 | RES | 200K | 1 |
4 | VR1 | ADJ-RES | 100R | 1 |
5 | C2.C3 | CAP | 222P | 2 |
6 | C1.C4 | CAP | 104P | 2 |
7 | C5 | E-CAP | 100UF | 1 |
8 | LED1 | LED | 5mm Red | 1 |
9 | Q2.Q3 | Transistor | S9012 | 2 |
10 | Q1 | Transistor | S9018 | 1 |
11 | SW1 | Power | SW | 1 |
12 | SP1 | Buzzer | 9*12 | 1 |
13 | J1 | Power-Socket | KF301-2 | 1 |
14 | —— | PCB | MDS-60 | 1 |
15 | Choose | Battery box | AA1.5V*3 | 1 |
Schematic of the kit:
Click on the images below to see all the assembly steps. You can also see the images on Flickr.
Check out all the images below
Documentation:
This is a simple metal sensor DIY electronic kit for electronics beginners. Use 3V-5V battery and take metal to its proximity, it will activate the buzzer. The kit can detect metals up to 5cm.
Kit parameters:
Supply voltage: 3-5V
Dimensions: 66 * 61MM
Maximum detection range: 5CM
The schematic of the kit is given below:You can see the images below to get tips for assembling the kit. You can find all the images on Flickr also.
Check out these product images also
It is an excellent DIY amplifier kit for electronics beginners with excellent sound quality. You don’t hear any noise until your ears are close to speakers. This amplifier uses a TDA7297 two-channel amplifier chip. (more…)
TDA2030A is widely used as a Hi-Fi audio amplifier in computer speakers.
It has the current limiter as well as thermal shutdown functions.
Specifications:
Output Power: Maximum 18W
Supply Voltage: DC 9V-24V (recommended DC 12V, this voltage to the heat sink requirements are very low.
The maximum supply of this board is actually up to 40V, but you need to change the board’s electrolytic capacitor C1. The capacitor voltage value should be higher than the supply voltage.
Static Current: about 25mA (disconnect to tone, connect to 8Ω speaker, 12V power supply)
Speaker Impedance: 4Ω-8Ω
Total harmonic distortion: THD 0.08%(Po=0.1 to 14W,RL=4Ω)
SNR: 94dB-106dB(1W-15W)
Heat: The higher the supply voltage, the higher the heat is generated.
Schematic:
Check out all the images to get tips for assembly. You can see all the images on Flickr also.
Other images of the kit
AMP-1 amplifier uses TDA2822M as an amplifier chip. This chip is STMicroelectronics (ST) developed dual-channel monolithic power amplifier IC, usually used in the pocket cassette player (WALKMAN), tape recorders and multimedia speaker for the audio amplifier. It has a simple circuit, produces good sound quality, it has a wide voltage range and other characteristics that can work in stereo and bridge amplification (BTL) circuit form. (more…)
How to assemble the transmitter kit. You can see all the images on Flickr also.
All other images of the kit
This is a very basic electronic DIY kit for electronics beginners. There are few LEDs in the circuit that can be turned on by sound. The larger the sound intensity the more the LEDs glow. There is a microphone in the circuit which is sensitive enough to pick surrounding sounds. (more…)
This is a DIY touch delay LED kit parts. When the user touches the kit, all the LEDs turn on. It is a very basic learning kit for beginners and learners. (more…)
This is a basic electronics learning kit based on NE555 and uA741. Check out the following images for assembly. You can see all the images on Flickr also.
Other images of the kit:
This is yet another LM317 based power supply for electronics hobbyists and beginners. (more…)
This is yet another audio LED spectrum DIY kit. Connect the kit to any audio source and see the lights patterns changing according to the audio signal. (more…)
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