amplifier schematic
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OP-AMP or comparator Astable multivibrator
Simulation schematic for an astable multivibrator. Parameters: Vcc = 24V, Vol = 1V, Voh = 21V. The power supply is Vcc, with connections from Vcc to ground. The time constant is determined by R1 and the capacitor C1, where R1...
1 transistor treasure locator circuit
The locator utilizes a transistor radio as the detector. By tuning the radio to a weak station, the capacitor C1 can be adjusted so that the locator's oscillator beats against the received signal. When the search head passes over metal,...
Accurate-variable-gain-circuit
The circuit can utilize any general-purpose, low-offset, low-drift operational amplifier (op amp), such as the OP-07. The differential signal from the bridge feeds into an amplifier that drives a standard, rugged ±50 µA meter. However, near the null point, the...
Wilf Rigter`s SIMD1 V2
In the never-ending quest for simplicity, even one extra diode is a price I loathe to pay. To avoid using extra components, it struck me that the two diodes in SIMD1 V1 were connected like the two junctions in one...
Transistor Tester
This circuit can measure both small signal hfe and DC current gain hFE of a low to medium power transistor.
The circuit is designed to evaluate the current gain characteristics of low to medium power transistors by measuring both the small...
2 X 22 Watt Stereo Amplifier Circuit using IC TDA 1554
A high-quality stereo amplifier circuit of 44 Watts (22 Watts per channel) using the TDA 1554 IC. This is a powerful audio amplifier circuit for 2 channels.
The described stereo amplifier circuit utilizes the TDA 1554 integrated circuit (IC), which is...
transistor timer
A single transistor timer circuit tutorial designed for beginners in electronics. This is an easy electronic circuit that can be constructed on a breadboard.
The single transistor timer circuit utilizes a transistor as the primary switching element to create a delay...
Op-Amp Application: Voltage Comparators
Two reasons why the LM101 is well-suited for comparator applications are its large differential input voltage range and the ease of clamping the output.
The LM101 operational amplifier is particularly advantageous for use in comparator circuits due to its significant differential...
Portable 230V lamp flasher circuit diagram
Portable 230V lamp flasher circuit diagram. The circuit is entirely transistorized and powered by a battery. A free-running oscillator circuit is implemented using two low-power, low-noise transistors, T1 and T2. One of these transistors remains in a conducting state while...