Digital Voice Recorder/Playback (UM5100)
Posted on Jun 12, 2012
file1: Click here to download LM386.pdf
file2: Click here to download LM324.pdf
file3: Click here to download ISD5100.pdf
file4: Click here to download CY6264.pdf
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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This type of charger couples RF from L2 to an external pickup coil. The pickup coil connects to...
Using a Motorola MC34118 speakerphone IC, this adapter can be used with a regular telephone to...
The circuit consist of 10 k and 470 k resistors. Also one potentiometer resistor and led was...
R2_47R 1/4W Resistor D1_LED (Any dimension, shape and color) Q1_Infra-red Photo Transistor (Any...
The original smoke alarm circuit has some problems and has left some hobbyists and students...
Temperature-indicator and temperature-based products have generated wide interest. There are...
I opened remote of a RC car and extended wires out of backward, forward, left and right switches....
For a few experiments such as solar air heaters, I needed a automatic turning on and off of a...
I`ve had an interest in building a simple VXO transmitter for many years, but was unsure that the...
A multivibrator is an electronic circuit used to implement a variety of simple two-state systems...
CS9482 integrated circuit fabrication with holiday lights circuit shown in Figure 2-37. Since...
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