Random Ramblings
Posted on Feb 6, 2014
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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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What got me interested in building these diminutive devices is the S3FM connector assembly made...
Transistor Ql, a 2N3563, and its associated components form an oscillator circuit that will...
Opening SA, changes the indicator lamp from flashing to steady-lit condition. The 6-V...
The heart of the electroscope is the two junction FETs Ql and Q2 connected in a balanced-bridge...
The dc values of op-amp offsets can`t always be taken for granted when delivering ac outputs. No...
We chose to build a nightlight combined with a wake-up alarm. Our nightlight features not one,...
When designing bass reflex loudspeaker cabinets, it is necessary to measure the resonance of the...
The AN7147 Dual 5. 3-watt Audio Power Amplifier from Panasonic is listed as a replacement type`...
This is a simple and low cost wide band VHF field strength meter. The field strength is measured...
U20 is a 556 timer configured as a one shot multivibrator. The output pulse width is determined...
This topic continues from the more general Passive Tone Control circuit, which begins using only...
This program includes circuit design cad, simulation, and auto routing PC layout. I also use...
The use of electrically excited gas discharges significantly predates the invention of the...
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