Electronics By INVENTIONS

• This is siren sound effects project sounds like the siren of an ambulance or police car. It produces low-pitched tones alternately. This project, suitable for beginners. Build a simple, but widely applied. The siren sound is a sound listening to indeed impact. Commonly used as a sounds alarms in many forms. Such as a burglar alarm in the house or install in a car as alert sound ask to give way on ambulance, police car, or various recovery vehicles.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This project uses a single LM386 IC. Audio output power is approx 500mW. If output sound of your audio player is weak, if you want to increase sound output, then this project is good choice. Circuit works on low voltage supply and work well with a battery too.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This simple soil moisture tester quickly checks the state of their plants and how much attention they need. Recommended for all plant owners! This is a very useful soil moisture tester. Two electrodes are stuck in the soil and the moisture level is shown on an LED display. The LEDs have been arranged into three colours: Green LEDs indicate that the soil is damp, Yellow LEDs that it’s getting a bit dry and Red LEDs warn that immediate action is required!
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• In all the houses door bells exists. This two tone ding-dong melody door ringer generates tones and amplifies using three transistors. Output sound through a speaker.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This 0 to 10V DC Volt monitor project has been designed around LM3914 IC, you can use this for project which instantly visualizing DC voltage level. This project can be used as a voltage tester. 12V power supply is for this circuit to operate. Output is 10 LEDs and each LED lit represents 1 volt measured.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This is an electronic dice circuit which looks like a real dice. LEDs are positioned in the form of dice on PCB. For playing we use the push button switch to throw the dice. When we press the push button switch, all LEDs (7 LEDs) flashes together, but when we release push button switch, all LEDs stop flashing and some LEDs glow continuously representing form of the dice. Each time LEDs glow randomly.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This Logic Probe project using two transistors is a very simple circuit that can be implemented using two NPN bipolar transistors in a Darlington configuration. This circuit will turn on the LED when there is a logical “1” on its input and turn it off when there is a logical “0”.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• A simple electronic toy piano can be easily constructed using the popular 555 timer IC. Total 7 push momentary switches in the circuit and by pressing each switch will generate a corresponding frequency, by which speaker will generate different tones (single frequency sound) for each switch. We are generating these frequencies by wiring 555 as an astable multivibrator.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• Have you ever wanted to broadcast your own radio station within your neighbourhood? This small and simple 87-108MHz FM transmitter is the toy that geeks have always wanted. It's great for room monitoring, baby listening and nature research.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This low current 9 VDC Regulated Power supply designed with bipolar transistor and Zener diode. The unregulated supply fed to input and the circuit regulate the voltage and provide constant 9V DC, 250mA.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• To construct short duration timers and alarm we don’t need expensive microcontrollers, we can create snooze or short duration alarm by using timer IC 555. Here this circuit is constructed to give alarm buzzer sound for four different timing intervals that is 5, 10, 15 and 30 minutes, so we can change the timing of this circuit easily as we want.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This moisture sensor Circuit sounds an alarm when water reaches its sensor or moisture level is very high in the air. This project is a simple and a cost effective project for use in many applications.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• When the button is released, this sets at one of the two gates that make up the multivibrator. The flip flop latches on at one of the two possible states: “head” or “tail” indicated by LEDs.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• By using this single transistor based FM transmitter Voice can be transmitted up to 100 meters in 88-108MHz range FM radio band. Long wires can be used as antenna. By adjusting the variable capacitor (trimmer) and spacing between coil turns frequency can be set within 88-108MHz range. To get maximum range use sensitive FM radio with external antenna.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• Using this project is an easy way to monitor the battery voltages, especially dry cell, NICAD, NIMH, supply up to 1.5 Voltage. Battery Monitor range 0.15V to 1.5V. The project is built with IC LM3914, IC senses the voltage levels of the battery and drives the 10 light emitting diodes based on the voltage detected on input connector. Circuit works on 5V DC. J1 Jumper is used to select the DOT mode or bar graph mode.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout and component layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

• This timer project can be used to switch either ON or OFF any device after set time. This project can be used in lots of application like switched ON/OFF electrical/electronic appliances. Time can be set between 2 Minutes to 2 Hours adjustable using jumper settings on the board. The settings are 120 sec, 240 sec, 480 sec, 960 sec, 1920 sec, 3840 sec and 7680 seconds.
• This is a great kit for a great price. This entire kit is designed and packaged for school, college students and hobbyists for etching PCB, building electronic projects and for learning circuit assembly/soldering.
• Project Pack includes: Project instruction sheets, all electronic, electrical and miscellaneous components required to assemble the circuit. BATTERY NOT INCLUDED WITH THIS KIT. Two pieces of PCB size copper clad- single side phenolic type, and a printout of actual size PCB layout of the project.
• Project instruction sheets include the topics: schematic/circuit diagram, circuit explanation, parts list and pin configurations.
• This Kit is recommended for 12 years age and above those who have basic knowledge of electronics and ability to read and understand schematic/circuit diagram and KNOWLEDGE of BOARD ETCHING and ASSEMBLY.

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