Provided only manual recording level control function, when the circuit is in the recording mode, the recording level as LM3915N was shown.
Click here to download the full size of the above Circuit.
3-180 as shown in Figure 3-17 in the sound recording circuit by IC] RC network and related audio recording preamplifier circuit. In playback features common with (NOr) equalization circuit, with chromium (Cr02) and metal (Met) with three different tape playback equalization network network, controlled by switch o IC2a etc. playback voltage amplifier , to adapt the level of the input amplifier circuit requirements. IC2b and related network of recording equalization network, for ordinary tape and C12 composed by the R17RisCl1 low frequency compensation network, high-frequency compensation by R19, , Cl3, q4 composition o for chromium metal band and high frequency band, is only for compensation, C15 -, C16 and R2l composed of high-frequency compensation chrome band, C17.CIS Biao and high compensation network consisting of a metal band. RP3 potentiometer to manually adjust the recording level. High-frequency transformer T and VTi, VTz composed push-pull high frequency magnetic bias oscillation circuit, the oscillation frequency is 90kHz ;. The bias magnetic oscillator on the one hand to provide the erase erase head bias current, the other for audio recording heads for sound recording bias current. In order to ensure the stability of the oscillation frequency of the bias magnet, power supply magnetic bias oscillation circuit using an LC filter o Partial magnetic resonance oscillation circuit in common with the same set, chrome belt, metal band selector switch, to provide different oscillating current o
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.....
characters left: