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 LM386 audio amplifier circuit with PCB

Thursday, October 9th, 2014

This is an audio amplifier that can be used with a small 9 volt Battery Operated,Current use as little as 5 milliamps.And amplification up to 500 mW. Which is sufficient to expand the sound from a sound about or the CD Walk Man out to the small speakers clearly. When entering the power supply 9-volt […]


 Cheap adjustable 0-30V 2A Laboratory DC Power Supply

Thursday, October 9th, 2014

This 0-30V power supply is the variable voltage Regulator at 2A max, by used IC-723 for control volt stable regulated. The 2N3055 power transistor for boost up current to 2 Amp. It suitable for general electronics work shop. Because it is a simple circuit and easy circuit. In addition to this has the over current […]


 0-30V,0-2A adjustable voltage and current regulator

Wednesday, October 8th, 2014

This is the 0-30V,0-2A adjustable voltage and current regulator that developed from the cheap adjustable 0-30V 2A Laboratory DC Power Supply project using LM723 is used widely, for a long time. This project can control the amount of current flow is maximum. We modified the circuit as circuit in Figure 1. Which this circuit, the […]


 True R.M.S Converter circuit

Monday, October 6th, 2014

This is a true r.m.s. Converter circuit. it use parts that easy to find and the normal quality. But we must to use normally parts that Low tolerances and more precise tuning. This use principle of the automatic gain control circuit; AGC). Which include two ICs, number – XR 13600 (A1 and A2) and XR […]


 Duty factor meter circuit

Saturday, October 4th, 2014

This is the simple duty factor meter circuit. We use mosfet and meter and more few part. So easy and cheap than others tools. How it works. The duty factor of square wave signal can be measure by the pulse counter circuit or the oscilloscope. Figure: Schematic diagram of the Duty factor meter But this […]





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