Amperite stop-alert brake light pulsator

[Guest]

SUCCESS
I pulled the cover and figured out it was a 555 timing circuit buried in expoy. A little deduction and trial and error but adding a 100 K ohm resistor made the flasher much more noticeable
Video at 6 PM

It's 8 and no video????
Slacker

 

[posplayr]

See the first post in this thread for a before after comparision.

This is with the 100K ohm resistor mod.

http://www.youtube.com/watch?v=QK244FTfvuQ

The STOP ALERT actally flashes too fast and doesnt remove the voltage from the brake filament for long enough. After a little detective work I found that the circuit is based on a 555 times in astable mode. The resistor I added increased the down time and made the flash much more pronounced. 100K ohms did the trick. Hot glue the parts for vibraction and glue it back together for water resistance.

Amperlite STOP ALERT (after modification) mounted at the tail under the seat. This is a two terminal device that goes in series with the +12V lead to the bright filament in your brake light. It is polarity sensitive so mark your leads for the + side and put that to connector #1.

 

[posplayr]

I got this from the
https://www.kisantech.com/regulations.php

looks like the nominal flash rate is supposed to be 4.0 hz +/- 0.66

I measured my Amperlite and they are right at 4.08 hz with 20% off duty cycle. I might take a spare with a relay and hook it up to the headlamps as well. Cheap solution I know but I know what I have then.

Below is the federal standard for Headlamp modulators. I dont understand what the light sensor is for. Is the modulation supposed to be turned off during daylight hours?

S7.9.4 Motorcycle headlamp modulation system.

S7.9.4.1 A headlamp on a motorcycle may be wired to modulate either the upper beam or the lower beam from its maximum intensity to a lesser intensity, provided that:
(a) The rate of modulation shall be 240 <plus-minus<ls-thn-eq>40 cycles per minute. (4.0 +/- 0.66 Hz)
(b) The headlamp shall be operated at maximum power for 50 to 70 percent of each cycle. 70% max
(c) The lowest intensity at any test point shall be not less than 17 percent of the maximum intensity measured at the same point.
(d) The modulator switch shall be wired in the power lead of the beam filament being modulated and not in the ground side of the circuit.
(e) Means shall be provided so that both the lower beam and upper beam [[Page 330]] remain operable in the event of a modulator failure.
(f) The system shall include a sensor mounted with the axis of its sensing element perpendicular to a horizontal plane. Headlamp modulation shall cease whenever the level of light emitted by a tungsten filament light operating at 3000[deg] Kelvin is either less than 270 lux (25 foot-candles) of direct light for upward pointing sensors or less than 60 lux (5.6 foot-candles) of reflected light for downward pointing sensors. The light is measured by a silicon cell type light meter that is located at the sensor and pointing in the same direction as the sensor. A Kodak Gray Card (Kodak R-27) is placed at ground level to simulate the road surface in testing downward pointing sensors.
(g) When tested in accordance with the test profile shown in Figure 9, the voltage drop across the modulator when the lamp is on at all test conditions for 12 volt systems and 6 volt systems shall not be greater than .45 volt. The modulator shall meet all the provisions of the standard after completion of the test profile shown in Figure 9.

(h) Means shall be provided so that both the lower and upper beam function at design voltage when the headlamp control switch is in either the lower or upper beam position when the modulator is off.
S7.9.4.2
(a) Each motorcycle headlamp modulator not intended as original equipment, or its container, shall be labeled with the maximum wattage, and the minimum wattage appropriate for its use. Additionally, each such modulator shall comply with S7.9.4.1 (a) through (g) when connected to a headlamp of the maximum rated power and a headlamp of the minimum rated power, and shall provide means so that the modulated beam functions at design voltage when the modulator is off.
(b) Instructions, with a diagram, shall be provided for mounting the light sensor including location on the motorcycle, distance above the road surface, and orientation with respect to the light. S7.9.5 Each replaceable bulb headlamp that is designed to meet the photometric requirements of paragraph S7.9.1(a) or paragraph S7.9.2(a) and that is equipped with a light source other than a replaceable light source meeting the requirements of paragraph S7.7, shall have the word ``motorcycle'' permanently marked on the lens in characters not less than 0.114 in. (3 mm) in height. S7.9.6 A headlamp system shall be installed on a motorcycle in accordance with the requirements of this paragraph. S7.9.6.1 The headlamp system shall be located on the front of the motorcycle. S7.9.6.2 (a) If the system consists of a single headlamp, it shall be mounted on the vertical centerline of the motorcycle. If the headlamp contains more than one light source, each light source shall be mounted on the vertical centerline with the upper beam no higher than the lower beam, or horizontally disposed about the vertical centerline and mounted at the same height. If the light sources are horizontally disposed about the vertical centerline, the distance between the closest edges of the effective projected luminous lens area in front of the light sources shall not be greater than 200 mm (8 in.). (b) If the system consists of two headlamps, each of which provides both an upper and lower beam, the headlamps shall be mounted either at the same height and symmetrically disposed about the vertical centerline or mounted on the vertical centerline. If the headlamps are horizontally disposed about the vertical centerline, the distance between the closest edges of their effective projected luminous lens areas shall not be greater than 200 mm (8 in.).
(c) If the system consists of two headlamps, one of which provides an upper beam and one of which provides the lower beam, the headlamps shall be located on the vertical centerline with the upper beam no higher than the lower beam, or horizontally disposed about the vertical centerline and mounted at the same height. If the headlamps are horizontally disposed about the vertical centerline, the distance between the closest edges of their effective projected luminous lens areas shall not be greater than 200 mm (8 in.).

 

[posplayr]

OK I FINALLY installed the Amperlite on my ED. Pretty simple; find the 3 contact plug to your tail lights that has a brown, white and black/White wire. The White wire is the one of the brake lights. The end away from the brake light is the source. I cut the wire and added a red pigtail which goes to the #1 hot side of the Amperrite (it is polarity sensitive). The remaining harness was long enough to add a another female spade for the #2 connection. It all hides nicely behind my tool tray.

 

[Guest]

OK I FINALLY installed the Amperlite on my ED. Pretty simple; find the 3 contact plug to your tail lights that has a brown, white and black/White wire. The White wire is the one of the brake lights. The end away from the brake light is the source. I cut the wire and added a red pigtail which goes to the #1 hot side of the Amperrite (it is polarity sensitive). The remaining harness was long enough to add a another female spade for the #2 connection. It all hides nicely behind my tool tray.

Why would anyone it their right mind install that thing?

 

[posplayr]

Why would anyone it their right mind install that thing?

I needed a little ballast on the right hand side to improve my left hand cornering :dancing:

 

[kerrfunk]

I went with the basic hyperlite.


and here we have at nighttime from a distance (the noise is the rain)

 

[posplayr]

Bump.......................