Mosfet TESTERs
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Two-Transistor Sine-Wave Oscillator
This oscillator employs two transistors and operates the crystal in its fundamental mode. Capacitors CT and C2 should be approximately 2,700 pF for 1 MHz, 680 pF for 5 MHz, and 330 pF for 10 MHz. A capacitance of 150...
Robot control circuit composed of transistor and NE555
Figure 2-33 (a) illustrates the schematic diagram of a robot approaching an object. When no objects are detected in front of the robot, it moves forward in a straight line. If an object is detected on the left or right...
audio tone control with 2 transistor
The first BC109C transistor functions as a buffer, offering the circuit an input impedance of approximately 250,000 ohms and a voltage gain just below unity. As the Baxandall tone control circuit is a passive design, it attenuates all audio frequencies....
transistors audio controlled relay circuit
A circuit that activates a relay upon detecting audio pulses from one channel of an MP3 player. The intention is to synchronize recorded audio pulses with music to control a motor for mouth movement. For a stereo player, music or...
transistors Controlling LED with 300mV AC signal
Control an LED with an audio signal; however, the output signal is only 150 mV peak-to-peak (with a 150 mV positive offset). It is understood that a higher voltage than 0.6 V is required to activate the transistor, leading to...
metal detector circuit
This circuit diagram represents a low-cost metal detector utilizing a single transistor circuit in conjunction with an old pocket radio. It operates as a Colpitts oscillator functioning within the medium band frequency range, with the radio tuned to the same...
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mosfet prevents battery damage
Sealed lead-acid batteries are commonly used in power electronics applications, including uninterruptible power supplies (UPS), inverters, and emergency lamps. They provide power to the load when utility power is unavailable. Upon restoration of utility power, a charger supplies power to...
simple preamplifier for microphones tape heads etc
This circuit consists of a single transistor functioning as an amplifier, providing significant amplification for weak and unipolar signals, which can then be fed into a more powerful amplifier.
The described circuit utilizes a single transistor in a common-emitter configuration,...
70W High Power Amplifier with MOSFET
This schematic diagram illustrates a 70W power amplifier utilizing MOSFET technology for audio systems. Alternative input stage transistors include the Toshiba 2SA970BL and 2SC2240BL, which serve as suitable substitutes for the Hitachi 2SA1085E.
The 70W power amplifier is designed to deliver...