The red LED provides visual indication of the current flowing through the resistor-zener-diode circuit. The higher the current, the brighter the LED will light. You can omit this LED if you don’t need ...

If the diode being tested were open-circuit both LEDs on the unit would remain lit. A stable Multivibrator The trouble with describing the operation of an oscillator circuit is defining a suitable ...

This is a simple blinking led circuit powered from 220V that can be used to mark special places or as voltage indicator. The voltage from the mains charges the capacitor through R1 resistor and D1 ...

The 1206 LED is on its side in the middle ... The compensation depends on the LM334 and the diode being at the same temperature. 7. The circuit is super-sized to deliver 100 mA.

The control circuit responds by increasing the PWM on-time to boost the output voltage higher in a failed attempt to increase the LED current. In most instances, the output voltage rapidly rises in an ...

That led to an exploration of how those work ... and a pair of diodes (one of them a zener diode). He uses this basic circuit to drive simple regulators with input and output filter capacitors.

Kids love building electric circuits, but connecting light bulbs to batteries with fiddly wires is tricky for young hands. Play dough and light-emitting diodes (LEDs) solve the problem beautifully.