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  • Small Transistor Metronome

    2016-05-08 03:55:0562

    Metronome circuit is a much cheaper option compared to old mechanical metronome. With only few electronic components, we can build a low cost metronome...

  • Transistor Oscillators

    2016-05-08 03:50:3668

    Essentials of Transistor Oscillators An oscillator must have the following three elements Oscillatory circuit or element.Amplifier.Feedback network. Th...

  • Two Transistor (Boy's Radio) Schematic and Theory of Operati

    2016-05-08 03:50:27128

    It has been interesting analyzing these radios. You have to give the Japanese credit for even making a radio that can drive a speaker with only 2 trans...

  • The Voltage Regulator With a Field Effect Transistor

    2016-05-08 03:41:3873

    Feature of this transistor compensation voltage (see picture) – used in the feedback field effect transistor VT3, which acts as a dynamic load for th...

  • Low Frequency FM Circuit of Transistors

    2016-05-08 03:31:4660

    The picture is low frequency FM circuit of transistors.In this circuit, emitter coupling multivibrator is composed of Vt1 and VT2 and constant current ...

  • Transistor AM Modulator Circuit Diagram

    2016-05-08 03:24:4365

    Modulation is the process of changing some characteristics (e.g. amplitude, frequency or phase) of a carrier wave in accordance with the intensity of t...

  • Mono Preamp Mic based BC108 Transistor

    2016-05-08 03:15:4382

    The microphone preamp based transistor described here is powered by 9 V and less than 1 mA current consumption, it will allows you to use a small 9 V r...

  • Voice logic probe by transistor BC557

    2016-05-08 02:53:08142

    The key is that thelogic probe circuit, using a light emitting diode, or LED display is a state (high or low) point of the analysis, but on the other h...

  • One Transistor Radio(BC548)

    2016-05-08 02:44:04234

    This article describes the One Transistor Radio (BC548). The principle is very simple, very practical. The circuit components can help you understand b...

  • single-transistor phase splitter

    2016-05-08 02:37:0563

    The circuit uses the inverting properties of an emitter follower with a collector load. You have to experiment for a value of R and the pot that will k...

  • INEXPENSIVE_TWO_TRANSISTOR_XOR_GATE

    2016-05-08 02:34:5661

    For some applications, the cost or size of XOR-gate chips can be prohibitive. One alternative is the two-transistor combination shown, which forms an i...

  • VARIABLE_SENSITIVITY_PHOTOTRANSISTOR_CIRCUIT

    2016-05-08 02:25:1561

    A variable resistor is used to vary the light-level response of a phototransistor. Phototransistors are more light sensitive than photodiodes, but they...

  • The level shift circuit diagram completed by PNP transistors

    2016-05-08 02:16:5561

    PNP transistor forms common-emitter amplifier circuit to ensure that the transistors work in the enlarged area, and the collector level must be less th...

  • TRANSISTOR_DECREASES_RESET_TIME

    2016-05-08 02:10:4461

    Time for recharging C1 is reduced by factor of 30 when Q3 is added to conventional astable mvbr.-S. A. Bell, Added Transistor Decreases Multivibrator R...

  • BINARY_WITH_STEERING_CIRCUIT_TRANSISTOR

    2016-05-08 02:02:0561

    Input goes to steering transistor that replaces two back-to-back diodes normally used to drive bases of binary transistors through capacitive coupling....

  • transistor AK25HB120 and AK25HB160 internal circuits

    2016-05-08 01:48:5760

    The transistor AK25HB120 and AK25HB160 internal circuits:...

  • TRANSISTORIZED_FLASHER

    2016-05-08 01:39:3960

    Circuit NotesThis simple circuit will flash a 6 volt lamp at a rate determined by the size ofcapacitor C1.It is most economical on power as it only dra...

  • Transistor AK90GB80 and AK90HB120 internal circuits

    2016-05-08 01:32:1859

    The Transistor AK90GB80, AK90HB120 internal circuits is as shown:...

  • BODY_TEMPERATURE_TRANSISTOR_THERMOMETER

    2016-05-08 01:26:2060

    Covers range of 90°to 105°F in three steps, with , temperature indicated on meter that measures base bias of germanium transistor, for which bias var...

  • TRANSISTOR_PIN_FINDER

    2016-05-08 01:20:3760

    Simple audio oscillator is assembled as shown and values of R1 and C1 adiusted for desired tone. General-purpose transistor to be tested is then substi...

  • Car Battery Charger with Transistors Circuit

    2016-05-08 01:17:1561

    This car battery charger circuit can be used to charge 12V and 6V batteries. If it is used a transformer that can deliver 4A to 5A at a voltage between...

  • Darlington Transistor Pair Logic Probe (2N3904)

    2016-05-08 01:12:5272

    This article describes the Darlington Transistor Pair Logic Probe (2N3904). The content is very simple, very helpful. Components in this article can he...

  • Transistor Pin Identifier

    2016-05-08 01:06:26141

    Tests transistors and diodes for polarity. A three-phase wave form is derived from the 350Hz ring-of-three oscillator formed by IC1A, IC1B and IC1C, an...

  • Transistor radio application circuit of the ceramic filter

    2016-05-08 00:56:3061

    The transistor radio application circuit of the two-port and three-port ceramic filter. The ceramic filters B1 and B2 can be used in the 465kHz interme...

  • EIGHI_TRANSISTOR_MVBR

    2016-05-08 00:29:0959

    Emitter-followers Q5 and Q6 increase gain by providing low. impedance path for recharging timing capacitors. R7 controls mark/space ratio and R10 contr...

  • PHOTOTRANSISTOR_RELAY

    2016-05-08 00:24:1960

    With phototransistor Q1 dark, R1 biases Q2 into conduction and miniature SPDT relay (Radio Shack 275-004) is energized. When light falls on Q1, Q2 is t...

  • Single transistor Metal Detector circuit

    2016-05-08 00:11:4770

    The circuit is an oscillator and the way it keeps oscillating is due to positive feedback. This is the case with all oscillators and the component that...

  • Bipolar Junction Transistors

    2016-05-08 00:11:2964

    VVC diodes may not be in your junk box. For popcorn VFOs, if you really want to save money on a parts order, bipolar transistors such as the 2N3904 may...

  • Regulator 0-30V 1A By Transistor (2SC106)

    2016-05-08 00:07:14112

    This article describes the Regulator 0-30V 1A By Transistor (2SC106). The content is very simple, very helpful. Components in this article can help you...

  • TRANSISTORS_FOR_BC_221

    2016-05-07 23:55:1559

    TRANSISTORS FOR BC-221-Old BC-221 frequency meter can be modernized by replacing its three now-scarce tubes with four 2N3819 Nchannel JFETs and changin...

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