Free electronic circuit design and schematic diagram
Using this circuit, we can make animated LED for bike turning signal. The Led will blink from the right (LED 1) to the left side (LED 5). You must build the second unit to give the complete left and right t urn signal. For the right turn signal, arrange the LEDs so they blink from the left to the right […]
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This is Auto OFF Light circuit. After the switch is pressed, the bulb is kept illuminated for a few seconds. To increase the “ON” time, The 10k should be replaced by 100k. Here is the circuit: You can use this delayed auto-off lamp circuit to give temporary lighting for your stairway, or your dashboard, your bookshelf, or many more.
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Resistor and LM317L act as a current regulator set to 40 ma. Current will flow from the battery through one pair of LEDs, and then to the regulator, through the other pair of LEDs and finally back to the battery. Noise on the power supply lines filtered out by the capacitor. To make the current through them is roughly equivalent, […]
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Below is reverse engineered circuit diagram of yet another commercially produced solar garden lamp. To turn the light on at night, this depends upon a CDS photocell. It allows the battery to charge more efficiently although more complex than the circuits. Read more original source: http://members.shaw.ca/novotill/SolarGardenLight/index.htm
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This is Electronic Ballast for CFL (Compact Fluorescent Lamp) circuit using IR2156. The IR2156 contains a high voltage half-bridge gate driver with a state diagram and programmable oscillator to make a full ballast control IC. The feature of IR2156 are programmable preheat time, programmable preheat and run frequencies, programmable over-current protection and programmable dead-time. Protection from filament failures, failure of […]
Read moreLow efficiency and heat generation are the two biggest shortcomings of using linear regulators versus switching regulators for applications with high input/output voltage difference. These two things is used to prevent the usage of linear devices in many applications, specially in those with low power consumption requirements. However, the option of using linear LED drivers to address backlighting applications does […]
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This is Resonant Mode LED Driver circuit. This circuit is used to give a constant DC current through a string of a given number of LEDs. This circuit uses flyback, boost, or buck topology. Each of them has disadvantages and advantages depending on the number of LEDs being driven in series, the LED output current, if dimming is required, if […]
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