WiFi Detector
WiFi Detector
The following article describes detail information regarding the WiFi Detector Circuit Board Des…
Christmas Star
Christmas Star
This circuit can be used to construct an attractive Christmas Star. When we switch on this circu…
Automatic Room Lights
Automatic Room Lights
An ordinary automatic room power control circuit has only one light sensor. So when a pe…
Automatic Dual output Display
Automatic Dual output Display
This circuit lights up ten bulbs sequentially, first in one direc- tion and then in the …
Light Flasher
Light Flasher
This is a very basic circuit for flashing one or more LEDS and also to alternately flash one or …
Coilless FM transmitter
Coilless FM transmitter
The RF oscillator using the inverter N2 and 10.7Mhz ceramic filter is driving the parall…
FM transmitter
FM transmitter
Colpitts oscillator. Its frequency depends on the capacitance of the vary cap diode. The center …
Radio Remote Control using DTMF
Radio Remote Control using DTMF
H ere is a circuit of a remote control unit which makes use of the radio frequency signal…
Powerful AM transmitter
Powerful AM transmitter
The circuit for a powerful AM transmitter using ceramic resonator/filter of 3.587 MHz is…
40 meter Direct Conversion Receiver
40 meter Direct Conversion Receiver
Using the circuit of 40-metre band direct-conversion receiver descr- ibed here, one can …
Remote control using VHF modules
Remote control using VHF modules
A few designs for remote control switches, using VG40T and VG40R remote control pair, ar…
Long range FM transmitter
Long range FM transmitter
The power output of most of these circuits are very low because no power amplifier stages…
Car anti theft wireless alarm.
Car anti theft wireless alarm.
This FM radio-controlled anti- theft alarm can be used with any vehicle having 6- to 12-v…
5 band graphic equalizer using a single IC/chip
5 band graphic equalizer using a single IC/chip
This circuit uses a single chip, IC BA3812L for realizing a 5 band graphic equalizer for …
Digital Volume Control
Digital Volume Control
This circuit could be used for replacing your manual volume control in a stereo amplifier…
Use the CD-ROM drive as a audio CD player without the computer
Use the CD-ROM drive as a audio CD player without the computer
Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or…
Low cost intercom using transistors
Low cost intercom using transistors
The circuit comprises a 3-stage resistor-capacitor coupled amplifier. When ring button S2…
Stereo Channel Selector
Stereo Channel Selector
The add-on circuit presented here is useful for stereo systems. This circuit has provision for c…
