The following diagram is the schematic diagram of 12V NiCAD battery charger with charging rate of 200mA/Hour. Components List: Resistor: 1 K Ohm, 68 Ohm, 2 K Ohm, Potensiometer 10K Ohm Diode: IN4001, 2x Zener IN752 Transistor: 2N2219, 2N2222
The following diagram is the circuit diagram of low cost 12V stereo tone control which also available in kit, you may find the kit at electronic part store around your place. The circuit build based on ordinary tone control circuit, using two low cost transistors FCS9014 in each channel, so there are will be four… Read More »
The circuit below is a Dynamic Mic Compressor circuit which is simple, easy to built, inexpensive but the results are quite satisfactory. Audio output sounded outstanding. The principle of this circuit is very simple, the first transistor is used as microphone pre-amplifier. Then a second transistor used as a buffer. And the third transistor is… Read More »
This is a very basic circuit diagram of 3 band tone control. This basic tone control circuit was originally intended for home audio use, but should be able to be hacked into an effect circuit with very minor modification. Resistance value of resistor R1 is left up to the user depending on gain needs, R2… Read More »
Here’s a circuit of 7W audio amplifier that is very simple and very easy to build. This amplifier is built using TBA810 as the main component with the support of a few passive components. This circuit can work well, kits and components of this circuit can be found easily at an electronics store in your… Read More »
The following image is the scheme diagram of six LED stereo VU display circuit which build using Dot/Bar Display Driver IC LM3915. This VU display should be connected before amplifier module circuit. You may connect this circuit at pre-amp output, tone control input/output or equaliser input/output. This circuit powered with 12V DC supply. About LM3915:… Read More »
Here is the USB sound card circuit based on PCM2706 which dedicated for USB audio. With USB controller module inside PCM2706, there is no more additional programming to the IC. The computer system will automatically detect this circuit when connected to the USB port. You will get stereo audio channel output from this circuit. Schematic… Read More »
This circuit is a wireless car alarm system that is built using two circuit modules, namely modules of transmitter and receiver modules. This circuit works on FM radio waves. Car alarms can be used on vehicles that have a 6-12VDC power supply. You can use the voltage stabilizer if your car power supply is too… Read More »
This simple 220V light dimmer circuit can be used to adjust the brightness of mains lights. It also can be used to adjust the speed of AC motors. It uses a triac, diac and has a radio-frequency interference (RFI) noise suppression circuit built into it as well. Schematic diagram: Components List: R1 = 10K R2… Read More »