Electronic circuitry Dot Award
Posted on Dec 11, 2010
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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A high impedance input is provided by Ql, a general purpose field effect transistor
This has a stable trigger 100 m V sensitivity at 50 MHz. The FETs comprise a simple high-speed...
Laser-receiver circuits must bias their avalanche photo diodes (APD) to achieve optimal gain....
This alternator regulator uses a 3-transistor dc amplifier, and is designed for a pulled up...
Booster for audio circuit diagram. Potentiometer R5 of 100K is a linear type with an on/off...
Here the simple mixer with 4 input and 2 op-amps: A basic mixer suitable for mixing microphones...
Some of you might wonder why a charger is needed at all, to charge a 12 Volt battery from a 12...
The leads from the transformer to the circuit are quite long (>5m). Apparently the 110V side of...
The TS-440S, like probably a number of other radios, does not mute the microphone while you are...
This causes T1 to conduct, taking pin 2 of IC1 `low`. IC1 then enters a timing cycle, the...
Inductors can be mimicked quite easily using operational amplifiers. The circuit shown here was...
[The following circuit is adapted from battery monitors and testers published in The...
This schematic shows a peak-reading diode voltmeter driven by two stages of amplification. A 100-...
The circuit is built around an LM317T adjustable voltage regulator. Its output voltage (VOUT) is...
Current three-phase motor phase protection circuit, as shown in FIG. 3 homemade small current...
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