usb cell phone charger circuit schematic
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Charging the Earth
The intentions for night air charging have been deemed possible but unnecessary. During late March and early April, the heating system operated effectively at night due to favorable air temperatures compared to glycol temperatures, which proved beneficial. With the arrival...
Common Hot-Lead Regulator
This circuit derives 5 V DC from 2 AA cells, even at their end-life voltages of 1.05 V, and is approximately 80% efficient, providing 5 V at 4 mA from 2.1 V at 11 mA. IC1 is manufactured by Maxim...
5V Power Supply Circuit Using Overvoltage Protection
This design outlines a power supply circuit capable of producing a 5V source voltage. The circuit is constructed using TTL integrated circuits (ICs) and features a simple design. In circuits utilizing TTL ICs, the supply voltage is critical, as even...
-15 V 1-A Regulated Power Supply
The supply receives -20 V from the rectifier/filter which is fed to the collector of the Darlington pnp pass transistor, a TIP105. The base drive to the TIP105 is supplied through resistor R5. The base of the TIP is driven...
Circuit Diagram Of Alarm Power Supply
The following circuit illustrates an Alarm Power Supply Circuit Diagram. Features include a 1-amp current output, suitable for a Modular Burglar Alarm operating at 12 volts.
The Alarm Power Supply Circuit is designed to provide a stable and reliable power source...
Multiuse tiny1
This small PCB, named Multiuse Tiny1, was originally designed to convert NES/SNES controllers to USB. Given the limited space inside an SNES controller, the PCB was designed to be as compact as possible. The design has evolved over time, accommodating...
Simple 5V power supply for digital circuits
This circuit is a small +5V power supply, which is useful when experimenting with digital electronics. Small inexpensive wall transformers with variable output voltage are available from any electronics shop and supermarket. Those transformers are easily available, but usually their...
9 Volt 2 Amp Power Supply
This circuit primarily relies on the regulator for its functionality. The 78S09 regulator can provide a continuous output of up to 2 amps while ensuring a low noise and well-regulated supply. Although the circuit can operate without additional components, a...
Positive-regulator-with-pnp-boost
The IC8211 serves as the voltage reference and regulator amplifier, with Q1 functioning as the series pass transistor. Resistor R1 defines the output current of the IC8211, while capacitors C1 and C2 ensure loop stability and help suppress the feedthrough...