Showing posts with label headlight. Show all posts
Showing posts with label headlight. Show all posts
Friday, October 3, 2014
Car Headlight Alarm circuit diagram
This car headlight alarm circuit can be set for one or two functions:
First, to indicate that the head lights (or the side lights) should be switched off after switching off the ignition contact. With this circuit, there should be no dead battery due to headlights that were left on.
Second, to indicate that the head lights should be on once ignition contact is switched on.
Car Headlight Alarm Features:
- Continuously repeated alarm tone for lights ON (may be disabled)
- Repeated alarm tone for lights OUT
- Only 3 wires are required for hook-up
Tuesday, August 12, 2014
Automatic Headlight Brightness Switch Wiring diagram Schematic
Going by car the highway with your high-beam headlights can actually increase your visibility, but can be a blinding hazard for other drivers. This easy schema can be connected into your headlight swap to provide automatic swaping between high and reduced beam headlights when there is oncoming traffic. It does this by feeling the lights of that traffic. In this way, you can propel securely with your high-beams on without blinding other drivers.
Automatic Headlight Brightness Switch Circuit Diagram
- Q1 should me mounted in such a way so it points toward the front of the car with a clear line of site.
- Suitable places are on the dashboard, in the front grill, etc.
- Adjust all the pots for proper response by testing on a deserted road.
- S1 enables and disables the schema.B1 is, obviously, in the car already.
- Before you try to connect this schema, get a wiring diagram for your car.
- Some auto manufacturers do weird things with wiring.
- Connection A goes to the high beam schema, B goes to the headlight switch common and C connects to the low beam schema.
| R1 | 1 | 5K 1/4W Resistor | |
| R2, R3, R4 | 3 | 5K Pot | |
| Q1 | 1 | NPN Phototransistor | |
| Q2 | 1 | 2N3906 PNP Transistor | |
| K1 | 1 | Low Current 12V SPST Relay | |
| K2 | 1 | High Current 12V SPDT Relay | |
| S1 | 1 | SPST Switch | |
| B1 | 1 | Car Battery | |
| MISC | 1 | Case, wire, board, knobs for pots |
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