Joule thief details
#joule thief
#voltage booster
#low voltage
#energy harvesting
#LED driver
#battery
#transistor
#oscillator
#DIY electronics
#circuit
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One transistor audio mixer (2N3563)
This circuit mixer features internal amplification using a 2N3563 transistor. Two input signals can be independently adjusted via VRI and VR2. The VR3 balance control allows for the attenuation of one signal while the other remains active. Additionally, the transistor...
small general purpose audio
This is a compact general-purpose audio test set. It includes a low distortion (0.3%) phase shift oscillator and a level meter. The level meter is calibrated at 100mV full scale deflection (FSD) and is suitable for gain measurements and general...
Simple Intercom Circuit Transistor
The circuit diagram represents a simple yet effective intercom system entirely based on transistors. It consists of three stages along with an RC amplifier. When the pushbutton S2 is pressed, the amplifier circuit around transistor T1 is activated.
The intercom circuit...
transistors Role of capacitor in this circuit
Oscillation is expected at the resonant frequency where the positive feedback is in phase with the input, specifically at 0 degrees. For oscillation to take place, the gain must be equal to or greater than 1 at that frequency. There...
Quadrature-outputs-oscillator
The XR-567 operates as a precision oscillator, providing two distinct square-wave outputs at pins 5 and 8, which are nearly in quadrature phase with one another. Due to the internal biasing configuration, the typical phase shift between the two outputs...
Changes inductive boost LED Driver
White LEDs can be connected in series or parallel, each method having its own advantages and disadvantages. A key disadvantage of the parallel connection is that the current and brightness of the LEDs do not automatically match. In contrast, series...
DC Coupled Transistor Amplifier
This is a directly coupled (DC) amplifier circuit. It is constructed using NPN and PNP transistors and is designed to amplify direct current (DC) signals.
The directly coupled amplifier circuit utilizes both NPN and PNP transistors to achieve its amplification. In...
Wide Input-Voltage Range High-Power LED Driver
This is a high-power LED driver circuit designed to accommodate a wide input-voltage range. The circuit utilizes a buck/boost converter controller to regulate the current supplied to a white LED.
The high-power LED driver circuit is engineered to effectively manage varying...
Low voltage flasher
Applying voltage to the circuit triggers SCR1. With SCR1 on, the voltage on the anode of SCR2 rises until SCR2 triggers to commutate SCR1. The voltage on the gate of SCR1 will swing negative at this time, and only after...