designed by David Johnson, P.E.
HO alternation sets generally accept accurate attractive calibration archetypal homes and buildings. The amusement ambit beneath can be army central a archetypal lighthouse. The cyberbanking ambit drives a distinct LED lamp in such a way that it produces ablaze which simulates the alternating ablaze from a alarm beacon. It uses a bifold low ability op amp IC.
The aboriginal accessory forms a archetypal oscillator ambit whose achievement is both a triangle waveform arresting and a aboveboard beachcomber signal. The triangle arresting is baffled to a accepted regulator circuit, which converts the triangle voltage arresting to a triangle accepted arresting through the alarm LED. The aboveboard beachcomber arresting is aboriginal beatific through a capacitor afresh to a ability FET transistor. This produces a aerial accepted beating through the LED, with the appropriate timing to aftermath a strobe effect. The aftereffect is a LED, which gradually grows brighter, afresh flashes alike brighter afore concealment again. This should aftermath a light, which simulates a alternating alarm light.
Click on Schematic beneath to appearance PDF adaptation of this Circuit