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Here is a simple USB powered lamp that can be used to light your desktop during power failures. The circuit operates from the 5 Volt available from the USB port. The 5V from the USB port is passed through current limiting resistor R2 and transistor Q1. The base of transistor Q1 is grounded via R1 which provides a constant bias voltage for Q1 together with D2. The diode D1 prevents the reverse flow of current from battery. C1 is used as a noise filter. Two white LED’s are used here for the lamp, you can also use a 2 V torch bulb instead of LED’s. LED D3 indicates connection with USB port.

Here is a simple USB powered lamp that can be used to light your desktop during power failures. The circuit operates from the 5 Volt available from the USB port. The 5V from the USB port is passed through current limiting resistor R2 and transistor Q1. The base of transistor Q1 is grounded via R1 which provides a constant bias voltage for Q1 together with D2. The diode D1 prevents the reverse flow of current from battery. C1 is used as a noise filter. Two white LED’s are used here for the lamp, you can also use a 2 V torch bulb instead of LED’s. LED D3 indicates connection with USB port.

Manufacturable Rev A proof-of-concept PCB system for the SOLX modular magnetic lamp platform, documenting a standardized magnetic pogo-pin electrical pass-through interface, 12V low-voltage power transfer, reserved data/ID contacts, module identification support, automatic configuration recognition, lifecycle metadata tracking capability, and patent-supporting manufacturing/test documentation.

Electric lamp. See https://en.wikipedia.org/wiki/Electric_light

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LED controller

LED controller

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Sensor using through hole LDR and power with SMT LED Resistors and PZT3904

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Smart Lamp System: Compact ESP32-Based Sensor-Integrated LED Lighting Solution

Light Detection: The LDR detects the ambient light level. When it is dark, the resistance of the LDR is high, resulting in a higher voltage at the inverting input (pin 2) of the op-amp. Comparison: The op-amp compares the voltage at pin 2 with the reference voltage set at pin 3 by the potentiometer (R3). If the voltage at pin 2 is higher than the reference voltage at pin 3 (indicating darkness), the op-amp output goes high. Transistor Activation: The high output from the op-amp turns on the transistor (Q1) by providing base current through R4. Relay Activation: When Q1 is turned on, current flows through the relay coil, energizing it and closing the relay contacts. Lamp Operation: The closed relay contacts complete the AC circuit, allowing current to flow and turning on the lamp (LA1). Light Detection (Daytime): When it is light, the resistance of the LDR decreases, resulting in a lower voltage at pin 2 of the op-amp. If this voltage is lower than the reference voltage at pin 3, the op-amp output goes low, turning off Q1, de-energizing the relay, and turning off the lampWelcome to your new project. Imagine what you can build here.

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Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

Solarbetriebene 12V-Lampensteuerung mit LiPo-Akkuladung, XIAO ESP32-C3 Steuerung, Helligkeitssensor, Batteriemessung und MOSFET-Ausgang für ein 12V-LED-Modul.

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