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Electronic Projects | Electronic Circuits
Welcome to electroschematics.com, the weblog where we discuss about electronic circuits schematics, printed circuit board diagrams and electronics projects diagrams. Discover electronic circuit designs, basic electronics ideas, circuit wiring, kits and new ways to practice your hobby. A huge collection of electronic schematics: audio amplifiers, radio and IR transmitters, antennas, diy kits and more.
Sound Level Meter Circuit
Posted by P. Marian in Audio | Measure | 2 comments
This sound level meter circuit can be used to control the intensity of a sound recording or in a disco. It has 5 measurement domains between 70 and 120 dB; reading accuracy is 0.5 dB. Microphone M1 is used to receive the acoustic signal and is coupled to C1, C2, R1 and R2. This components, together with the microphone’s...
LM317 audio amplifier
Posted by P. Marian in Audio | 10 comments
You probably know that LM317 IC is used as an adjustable voltage regulator, but did you know it can be used as an audio amplifier? This is a class A audio amplifier built with LM317 that delivers a maximum 1W audio power.
Use a good heatsink for the LM317 IC and adjust the 5K variable resistor so that you have 4.5V on 10Ω...
Gas leak detector circuit
Posted by P. Marian in Alarm | Measure | 14 comments
Join the forum discussion on this postHere is a gas leak detector circuit that detects the leakage of LPG gas and alerts the user through audio-visual indications. The circuit operates off a 9V PP3 battery. Zener diode ZD1 is used to convert 9V into 5V DC to drive the gas sensor module.
The gas leakage circuit uses the...
LM338 datasheet
Posted by P. Marian in Datasheet | 1 comment
The LM138/LM238/LM338 are adjustable 3-terminal positive voltage regulators capable of supplying in excess of 5A over a 1.2V to 32V output range. They are exceptionally easy to use and require only 2 resistors to set the output voltage. Careful circuit design has resulted in outstanding load and line regulation comparable to...
L14F1, L14F2 Datasheet
Posted by P. Marian in Datasheet | 1 comment
The L14F1/2 is a silicon photodarlington mounted in a narrow angle, TO-18 package.
L14F1 and L14F2 features
hermetically sealed package
narrow reception angle
L14F1/2...
UM3561 Datasheet
Posted by P. Marian in Datasheet | no responses
UM3561A is a low-cost, low-power CMOS LSI designed for use in alarm and toy applications (a three siren sound generator). Since the integrated circuit includes oscillator and selector circuits, a compact sound module can be constructed with only a few additional components. The M3561 contains a programmed mask ROM to simulate...
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