The transistor lat as SCR trigger
This circuit works similar to a SCR. When the trigger input is high, Both transistors Q2(PNP transistors) and Q1(PNP transistor) will work. Therefore, a current flow to the base pin of Q2, it has...
View ArticlePower outages prediction circuit
This circuit can be used to prevent a power failure. Example: Microcomputer systems. This circuit will send logic pulse “1” shortly before the power goes out completely. To trigger the power outage...
View ArticleDynamic Compressors without power supply
This dynamic compressors circuit that The reduction rate of the signal up to 20 dB at input between 100 mV to 10 volts. This circuit does not use external power. But used part of the input signal into...
View Article98-100MHz FM transmitters using one transistor and 1.5 volts battery
This is the small FM transmitters using one transistor and 1.5 volts battery as power supply, in 98MHz to 100 MHz FM frequency range. The coil-L is 8 turns of 18 swg wire wound with a inside diameter...
View ArticleSimple Two Transistors AM Transmitter Circuit
This simple AM transmitter circuit include of many parts. There is a transistor Q1 act as increase the audio signal (AF) from the crystal microphone and a resistors-R3 that limit amplitude of sound...
View ArticleLow volts stereo preamplifier with tone control circuit
This is the simple stereo amplifier for headphone with tone control circuit that use 1.5V X 2 only. It is used for mini MP3 player or other small source. I like it that use a few parts and low power....
View ArticleFM transmitters, 90-100MHz using two transistors and low voltage
Today lets to see the simple FM transmitters,90-100MHz that use two transistors, apply power supply with 1.5V battery The coil-L is 8.5 turns of 22 swg wire wound with a inside diameter air core of...
View Article1.5V FM transmitter using a varicap diode and two transistors
This circuit is a 1.5V FM transistor circuit that use also two transistors like others circuit before. But this circuit is special that we use a varicap diode. Figure 1 is a schematic diagram – This...
View ArticleFM transmitter 88-108MHz using two transistors and 1.5V battery
This is also the 88-108 MHz FM transmitter circuit that use 1.5 volts battery power supply source and use two-transistors so easy to builds and small size circuits. Figure 1 the schematic diagram...
View ArticleTA8225 BTL Amplifiers circuits
There is my friend want a TA8225’s PCB. But I not have it. Thus I search on internet. The TA8225 is BTL audio power amplifier for consumer application. It is designed for 45W high power, low distortion...
View ArticleSimple resistive load
Simplest, but very useful! The post Simple resistive load appeared first on Electronics Projects Circuits.
View Article555 audio simple ohmmeter circuit
This is 555 audio simple ohmmeter circuit. Some times, we need to measure roughly resistances only. we can know resistances by audio also fast check. The post 555 audio simple ohmmeter circuit appeared...
View ArticleSimple compressor with 1N914
This simple compressor circuit is suitable for use in a recorder tape from the speaker terminals of the receiver.This input can be changed from 200 mV to 6V. The output will remain at close to 5 mV. An...
View ArticleSignal sound receiver with induction coil
This circuit is learning about audio signals receiver through the air. The circuit uses to take sound signal that feeds to reach the circuit round of electric heel one line at has low impedance the...
View ArticleSimple speaker overload protection circuit
This is simple speaker overload protection circuit. Generally the level of a signal that departs output of sound signal generator the all. The that get fix have standard same score be 1Vrms. But in now...
View ArticleSimple non linear low pass filter
This is a simple simple non linearlow pass frequency filter circuit on passive model. We use passive components without transistors and any ICs. So is easy circuit. and It is small size and easy to...
View ArticleSplit stereo signal circuit
This Split stereo signal circuit model to are simple at use in fining wideness of a signal stereo. Which be valuable very for an earphone stereo. or the system that the opening between a loudspeaker...
View ArticleSimple 555 IC Tester Circuit Diagram
Normal multimeter cannot check it. This circuit can help you. The post Simple 555 IC Tester Circuit Diagram appeared first on Electronics Projects Circuits.
View ArticleThe Filter circuit for the Scratch and Rumble Noise
If a friend gets into trouble about the noise. Try out this circuit before The post The Filter circuit for the Scratch and Rumble Noise appeared first on Electronics Projects Circuits.
View ArticleVHF Dip Meter circuit
The frequency meter by use the LC resonance circuit that adjustable until the frequency show peak amplitude. The post VHF Dip Meter circuit appeared first on Electronics Projects Circuits.
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