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 The Op-amp IC tester circuit

Sunday, March 1st, 2015

This is an simple op-amp IC tester circuit that cheap and easy to build. for test many op-amp ICs fast check. How it works In Figure 1 is the schematic diagram of this tool, that is used to generate the square wave. The working of circuit for the OP-AMP is the tested IC will generate […]


 Let’s build the digital multimeter using ICL7107

Sunday, February 15th, 2015

We can modify the dc digital meter circuit to smart full function multimeter, that versatile available. For example : measure DC voltage, ACV, DC Amp meter, AC Amp meter and as the Ohms meter etc. Try to build this projects to use it really worth Fully enjoy Special Feature DC Voltage: 200mV, 2V, 20V, 200V, […]


 Super boost bass by UA741

Tuesday, February 3rd, 2015

This General purpose boost bass circuit is low pass filter that famous for decades over the years,can be used to increase the bass to the amplifier gain. The characteristics similar to a normal tone control circuits, It is designed for high frequency in the Flat form. But The low frequency or bass can add more […]


 Simple Long Duration Timer using OP-AMP ICs

Thursday, January 29th, 2015

Simple Long Duration Timer using OP-AMP ICs If you need to build the RC timer circuit that long time delay we need to use too many resistors and capacitors. This may have caused the error is quite large. From the change to the device degradation and leakage. This circuit allows the RC time constant of […]


 2W(2 km) 88-108 MHz frequency VHF/FM transmitter

Friday, January 23rd, 2015

This is FM transmitter in VHF range. As Figure 1 Sonar with up to 2 watts, when used with a supply voltage of about 24V. In the case of applications typically do not want a high transmission. This circuit requires only one power supply 9V Only. If used voltage level of the power supply more […]



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