Circuit diagram of forgetting to turn off the car light reminder

Normal operation, if S2 is closed, Q1 is saturated, the oscillator stops oscillating, and this circuit is installed in the car. When the driver forgets to turn off the headlights. It can remind the driver to pay attention, at this time, the negative terminal of the car battery is grounded; B1 does not. The power of the oscillator is taken from the pilot panel indicator light. This is because it is considered that the indicator light always lights at the same time as the parking light or the front of the car, such as the ignition key turning on the circuit. If Q1 is saturated, Q2 and Q3 will not work. If it does not ignite, but the lights are still on, Q1 will be cut off and the oscillator

The 3 Phase Ac Power Supply system model SPS300VAC6000W is featured with high power density, high reliability and high precision, meanwhile it possesses operation interface of touch screen and keys manually. The 3 Phase Ac Power Source system is able to analog output normal or abnormal power input for electrical device to meet test requirements, which is applicable to electric, lighting, aviation sectors, etc. It could be applied to enterprise`s production test as well.

Some features as below:


  • 5.6`` large touch color screen, possess complete functions and easy to operate.
  • Support for USB data import/export and screen snap from front panel.
  • AC+DC mixed or independent output mode for voltage DC offset simulation.
  • Capable of setting voltage and current output restriction, support for constant current output mode.
  • Capable of setting output slope of voltage and frequency.
  • Capable of setting ON/OFF phase angle.
  • With reverse current protection to avoid current flowing backward.
  • Built-in power meter, which is capable of measuring 5 electrical parameters per phase, including voltage, current, power, etc.
  • Support mA current measurement function.


6000W Three Phase Ac Source System

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APM Technologies (Dongguan) Co., Ltd , https://www.apmpowersupply.com