Portable Microphone Preamplifier
Posted on Jan 1, 2013
New Circuits
-
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.....
.
My generator can produce sine- and squarewaves with frequencies between 1 Hz and 100 kHz and...
This is a simple serial port buffer circuit I designed for a friend to speed up his SLIP...
Indicator lamp brightness varies in step with modulated RF signal. Adjust R2 with transmitter on...
This is a little transmitter that could be put into a plastic Easter egg. It delivers...
This circuit uses a 555 timer that is setup to each runn in associate Astable operative mode....
LM317HV adjustable regulator is capable of supplying in excess of 1. 5A over a 1. 2V to 57V...
This device was designed on request and allows sequential operation of four Leds either to left...
A sensitive detector for static electricity based around a single Field Effect Transistor It can...
This 1000 watt power inverter circuit diagram based on MOSFET RF50N06. If you want more power...
This nifty sound level meter is a perfect one chip replacement for the standard analog meters. It...
One PIC to act as a keypad driver though plus some primitive stuff to tie them together (when the...
Although you may well be the proud owner of the very latest NiCd battery charger, you may still...
This very simple high-level design demonstrates the product`s structure. Its integrated circuit...
Amplitude Modulation (AKA AM) was the first modulation type to impress audio on an RF carrier....
This circuit design is not tested by staff. The circuit design as submitted by the designer is...
Circuit shown in Figure 3-146. This eliminates the need for a step-down transformer line, using...
Digital precision pressure tester circuit shown in Fig. MAX1457 external ROM selection 93C66 type...
characters left: