This long-range FM radio transmitter has an additional RF power amplifier stage, after the oscillator stage. The extra RF power…
This easy to built circuit produces a warning beep when somebody crosses a secure area in your home or place…
This is variable DC power supply circuit, or we can call it adjustable DC power supply which give us a…
Here is the circuit diagram of stereo digital volume control. This circuit could possibly be applied for upgrading your manual…
The following diagram is a simple mobile phone battery charger circuit. The design is simple, easy to build and inexpensive.…
Here the circuit diagram of simple and easy made battery level indicator. In general, in mobile phones, the battery levels…
This is the circuit diagram of USB powered stereo computer speaker, or it widely known as multimedia speakers for PCs.…
This is the circuit diagram of staircase light with automatic switch off. It based on timer which is can be…
This is a portable, 230V high-power incandescent electric lamp flasher circuit diagram. It is actually basically a double flasher (alternating…
This is an easy, low cost and easy built circuit of an electronic horn which is designed close to quadruple…