20pcs ka2284 led level

Buy 20Pcs KA2284 LED Level Indicator Module Audio Level Indicator Kit Electronic Pr for R540.47

Note: This is a DIY kit, you need to assembly it, supply schematic diagram only. Feature: Constant current output Wide operating voltage: 3.5V - 12V ALC circuits do not need to connect diodes or transistors The brightness level can be adjusted The circuit board adopts military grade 1.6MM FR4 sheet PCB dimensions: 40mm x 19mm Package includes: 1 x PCB board 2 x XH2.54-2P curved seat 2 x XH2.54-2P line 1 x 100 ohm resistance 1 x 10K resistance 1 x 2.2UF electrolytic capacitor 1 x 10UF electrolytic capacitor 1 x 103 blue and white potentiometer 1 x KA2284 chip 5 x 5MM green to green LED 1 x 5MM red to red LED

20Pcs NE555 Pulse Frequency Duty Cycle Adjustable Module Square Wave Signal Generator Features: 1. As a square wave signal generator,generates a square wave signal used for experimental development. 2. Used to drive a stepper motor for generating a square wave drive signal. 3. Generate adjustable pulse for MCU. 4. Generate adjustable pulse,to control circuitry associated. 5. Size: 31mm x 22mm 6. Main chip: NE555 7. Input Voltage: 5V-15V DC. When power supply is 5 V, the output current can be 15 MA around; when 12V power supply, the output current can 35 MA around 8. Input current: >=100 MA 9. Output amplitude: 4.2V V-PP to 11.4V V-PP. (Different input voltage, the output amplitude will be different) 10. Maximum output current: >=15MA (5V power supply, V-PP greater than 50%), >=35MA (12V power supply, V-PP greater than 50%) 11. Output with LED indication(low level,LED will on; high level,LED will off;low frequency, the LED flashes) 12. The output frequency range is selectable: LF file: 1Hz ~ 50Hz                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        &nbs

Buy 20pcs DIY Digital Display LED Logic Pen Electronic Kit High and Low Level Test Circuit Soldering for R574.05

Description: The item is for Arduino robot kit, raindrops, rain sensor, monitoring can be used for a variety of weather conditions, and converted into the number of the reference signal and the AO output. The sensor uses the FR-04 high-quality double-sided materials, King Size 5.0 * 4.0CM, and with the surface of the nickel plating treatment, against oxidative, conductivity, superior performance and longevity; The output in the form: digital switching outputs (0 and 1) and analog AO voltage output; TTL-level output, TTL output valid signal is low. Driving capability 100MA so, can directly drive relays, buzzer, a small fan, and so on. Sensitivity can be adjusted via potentiometer LED lights up when there is no rain output is high, raindrop up, the output ground level, LED light. Feature: Distribution bit to adjust sensitivity A fixed bolt hole for easy installation Power indicator, the output signal LED indicator The comparator output, the signal is clean, waveform, driving ability over 15mA Wide voltage LM393 comparator A large area of ??rain board, more conducive to detect rain Board with positioning holes to facilitate installation Raindrops and control panels are separate, easy to wire leads Specification: Small board PCB size: 3.2cm x 1.4cm Operating voltage: 3.3V-5V Voltage: 5V How to use: Connected to 5V power supply, the power indicator light, sensor board is not water droplets, DO output is high, the switch lights off, dropping on a drop of water, DO output is low, the indicator light switch, Brush off the the above water droplets, has returned to output high state.... AO analog output can be connected to the microcontroller AD port to detect the size of the drops in the above rainfall. DO TTL digital outputs can also be connected to the microcontroller detects whether there is rain. Connection mode: 1, VCC: positive power supply (3-5V) 2, GND: negative one. 3, DO: TTL switching signal output 4, AO: Analog signal output Package included:

Feature:   The amplifier uses the TDA2822M for the amplification chip, this chip is a dual-channel single-chip power amplifier integrated circuit, usually used for audio amplifier in the pocket cassette player (WALKMAN), tape recorders and multimedia active speakers. Can work in the stereo and bridge amplifier (BTL) circuit form.   TDA2822  power amplifier board:   Package Name: TDA2822M Amplifier Kit (Need soldering) Working voltage: DC4.5-9V PCB size: 46 * 35mm Speaker diameter: 50mm Speaker power: 0.25W KA2284 level indicator board: 1. Constant current output 2. Wide operating voltage: (3.5V - 12V) 3. The ALC circuit does not need to connect diodes or transistors 4. The bright level can be adjusted 5. The circuit board adopts military grade 1.6MM FR4 sheet 6. PCB dimensions: 40mm * 19mm TDA2822 power amplifier board list: 1 x PCB board 3 x 470UF25V electrolytic capacitor 2 x 100UF25V electrolytic capacitor 3 x 104 ceramic capacitors 1 x USB + 3.5 lines 1 x 50K dial potentiometer 2 x 4.7 ohm resistance 4 x 10K resistance 1 x 8P IC holder 1 x TDA2822 chip 2 x 8 ohm 0.25W 50MM speaker 1 x 0.5 m cable   KA2284 level indicator board list: 1 x PCB board 2 x XH2.54-2P curved seat 2 x XH2.54-2P line 1 x 100 ohm resistance 1 x 10K resistance 1 x 2.2UF electrolytic capacitor 1 x 10UF electrolytic capacitor 1 x 103 blue and white potentiometer 1 x KA2284 chip 5 x 5MM green to green LED 1 x 5MM red to red LED Soldered PCB, for reference only!

Buy 3Pcs KA2284 Level Indicator LED Audio Level Meter Electronic Production Kit Soldering Practice Parts for R178.92

DIY LM386 Amplifier Speaker Kit With Clear Box Transparent Case Description: The speaker box is kit, it need assemble all parts by yourself. (Please note before buying. We do not supply you a manual) The box size: 101 x 78 x 76mm Power supply: 9-12V DC Speaker parameters: Dimensions: diameter 52mm Total height: 28 mm Speaker resistance: 8 Ohm Rated power: 2W Maximum power capacity: 5W LM386 amplifier kit list: 1 x PCB board 1 x 100K adjustable resistor 1 x Potentiometer knob shell 1 x Pin Header(6-pin) 2 x 4.7K resistor 1 x 10 ohm resistor 2 x 104 ceramic capacitor 1 x DIP8 IC socket 1 x LM386 IC 1 x DC005 Block 1 x 3MM LED 1 x 10UF capacitor 1 x 100UF capacitance 1 x 1000UF capacitor 1 x 3.5 Audio Block KA2284 level indicator kit list: 1 x PCB board 2 x XH2.54-2P curved seat 2 x XH2.54-2P line 1 x 100 ohm resistor 1 x 10K resistor 1 x 2.2UF electrolytic capacitors 1 x 10UF electrolytic capacitor 1 x 103 blue white color potentiometer 1 x KA2284 chip 5 x 5MM green hair green LED 1 x 5MM red red LED