Archive for August, 2011

Voice logic probe by transistor BC557 The key is that the logic probe circuit, using a light emitting diode, or LED display is a state (high or low) point of the analysis, but on the other hand, it can display the state has the same voice. The circuit is shown, it is the audio source, click the tiny speaker with a

Oscillator astable multi-vibrator with Crystal controller Oscillator circuit of this nature.Often used as a clock circuit.This circuit uses a million crystal frequency control with stability.And a circuit that does not use the capacitor or Inductor all. Each transistor to work, the amplifier with feedback. The Q2 transistors to circuits with a gain equal to 1.The gain of the transistor Q1, as

Concentration test circuit This is the test concentration range, is ideal for a player to a game. Without a Net Amri alarm will be heard immediately. Operation of the circuit is to use Q1, Q2, R1, R2, R3, R4, C1 and C2 together astable multi vibrator is a rectangular waveform generator (Square Wave). It provides approximately 3 kHz

Battery operated heater Here is a simple heater circuit that can be operated from a 12V battery. The first part of the circuit is an astable multivibrator build around the two transistors Q1 and Q2 .The ON time of transistor Q2 is set to 0.5 S. The ON time of transistor Q1 can be varied by using the

Lamp Flasher by 2N2907 Bipolar Transistor I has evered to play the leading role Lamp Flasher Circuit with the integrated circuit. Which be the circuit that is simple but at this time a friend someone complain to come to that want the circuit that use the transistor. I then lead this circuit has come to in rows think to you. By

FM surveillance BuG Transmitter using 2N2222 Nov 7, 2008 … The Circuit shown can transmit voice to exceptionally good range. Tune trimmer to hear the signal to your near radio. Frequency range is …

FM telephone bug Jun 18, 2010 … A simple telephone transmitter circuit that is ideal for transmitting the telephone conversation through small distances.The circuit is very simple …

Mobile Bug Detector using CA3130 Sep 6, 2010 … This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half …

Bug Detector Circuit Mobile Bug Detector using CA3130. Monday, September 6th, 2010. This handy, pocket-size mobile transmission detector can sense the presence of an activated …

Telephone Listening Bug with FM Transmitter by A933 Mar 7, 2008 … Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio.

Telephone Listening Bug by A933 Jul 12, 2008 … Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM radio.

Tone-Decoder Nov 20, 2008 … Latching The 567 Output By IC Tone Decoder LM567 1 circuit is model Manual Reset. 2 circuit parts are model Logic Reset. The 2 both of …

FSK Demodulator-Tone Decoder with RC2211N Nov 20, 2008 … A monolithic phase locked loop for data communications. The IC contains a basic phase locked loop for tracking an input signal within the pass …

Basic Tone Detector Circuit By IC Tone Decoder 567 Jul 25, 2007 … Basic Tone Detector Circuit By IC Tone Decoder LM567 If we will study to hook the circuit tone Detector. Should try use the integrated circuit …

2-Frequency Oscillator By IC Tone Decoder NE567 Jul 25, 2007 … 2-Frequency Oscillator By IC Tone Decoder LM567 Today I begs for to advise 2- Frequency Oscillator ideas s by use IC Tone Decoder LM567 …

Latching The 567 Output By IC Tone Decoder 567 Jul 29, 2007 … Latching The 567 Output By IC Tone Decoder LM567 1 circuit is model Manual Reset. 2 circuit parts are model Logic Reset. The 2 both of …

5V 3A switching power supply by LM2576 Here is circuit switching power supply regulator 5V 3A for digital circuit. Use IC LM2576 DC to DC step down voltage regulator. Wide input voltage 8Vdc to 40Vdc. See to circuit for read detail more.

DC to DC step down voltage regulator by IC LM2576 Jul 17, 2007 … My friend wants the circuit DC to DC step down Converter. That can give current get tall about 3A one in the circuit that me advises. Be using …

Lm2576 Mar 20, 2008 … To solve the wasted-power problem, you can use a switch-mode regulator. The circuit of Figure 1 uses IC1, an LM2576 adjustable regulator. …

3A battery charger by LM2576 Nov 2, 2007 … This design is a 3A battery charger intended for use with 5-cell Ni-Cd or Ni-MH battery packs (but can be modified to suit other numbers of cells) …

power supply Switching Regulator 12V 3A by LM2576-12 Jan 10, 2008 … Here is circuit Switching power supply 12V 3A. Or circuit dc converterstep down voltage. Use IC LM2576-12 SIMPLE SWITCHER High …

3V 3A Regulator Switching by LM2576 Oct 2, 2007 … I build this project when I have a problem to driver stepping motor that draw current 3A at 3V.After search the infomation on the internet I have …

This be tone control circuit ,The small-sized. It the character Mono by use transistor just 2 PCS important equipment performs to enlarge sound signal gives the power goes up ,and have a button fines to decorate the sound completely. It be fine decorate the popularity in the sound , fine decorate the treble , and fine decorate the bass as well. It is convenient for a novice wants to try build Pre Tone control circuit keep be usable.

Please read more and view circuit at: Tone Control Mono by 2 Transister (C945)

More circuits
Transistor tone control circuit
Low noise tone control
Tone control Circuit
Low noise tone control circuit using C945
Digital Volume Control by DS1669
Active Tone Controls by Transistor
Tone Control Mono by 5 Transister (C945)
Treble Booster By 741
Pre Tone Control Stereo (bass-mid range-treble) by IC NE5532