Dialed-phone-number-vocalizer
Posted on Dec 21, 2012
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 device allows one or more lamps to illuminate at sunset and turn off at dawn. Q1 and Q2...
The solar cell is connected across the input of the FET (field-effect transistor), Ql, so that it...
The single-chip, burglar -alarm circuit shown uses a dual 556 timer, draws 10 mA of standby...
At half brightness, the lamp current is pulsed on and off (Fig. 50-12b) by the voltage developed...
Power is fed to transformer Tl, a small neon-sign transformer, which steps the voltage up to...
This LAN tester circuit originally designed by Vassilis Stergiopoulos. This LAN tester circuit...
Using this low amount Project one can carbon AUDIO from TV after advancing anyone. It does not...
Make it a habit to check the temperature gauge every 5-10 miles. The temperature gauge can tell...
Battery manufacturers recommend charging 12V lead-acid batteries at a charge voltage of 13. 5 -...
This relay driver boosts the input impedance with a regular BC547 NPN transistor (or equivalent)....
This is a simple home telephone ringtone generator circuit which is built with applying only...
The circuit would automatically light a bulb on arrival of a telephone ring and simultaneously...
FIG sensitive ((InW) .OPA111 optical receiver amplifier feedback resistor of FIG 200Mn, because...
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