Hi Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
RAC68
Darth Vader
Offline
Hi All,
First, here is a pic of the optical trigger replacing the standard points setup of the SU pump. The pin from the diaphragm moves a flag through an optical switch and electronically triggers the power to the coil. The electronics incorporated in the trigger allow form management of the higher then expected build up of voltage by the coil so is better protected then most SU pumps. As you can see from the installation, you can not tell it from the original points version as we designed it to fit under the original cover.
Looking closely, you can see the flag that triggers the optical switch.
Instead of having a spare pump, I only keep the coil with trigger and diaphragm as a spare. This approach allows me to remove the top surrounding bolts and replace with a spare while leaving the mounted body with lines attached in place. This approach allows cleaning aqccess to the body but eliminates the removal and installation of the part of the pump that is most difficult and prone to creating additional issues and allows the installation of the electric section with diaphragm by just screwing in the multiple bolts. Sometimes diaphragm adjustment will improve performance but is easily done at the time and requires no additional tools.
I must admit, since we discovered the TSV for the points trigger and canceled further effort on our optical trigger project (create sound similar to points, and any number of other additions), I keep the prototype as a spare to, in small part, validate our efforts. However, the guys I worked with were great and I learned how to design and make printed circuits.
Ray(64BJ8P1)
First, here is a pic of the optical trigger replacing the standard points setup of the SU pump. The pin from the diaphragm moves a flag through an optical switch and electronically triggers the power to the coil. The electronics incorporated in the trigger allow form management of the higher then expected build up of voltage by the coil so is better protected then most SU pumps. As you can see from the installation, you can not tell it from the original points version as we designed it to fit under the original cover.
Looking closely, you can see the flag that triggers the optical switch.Instead of having a spare pump, I only keep the coil with trigger and diaphragm as a spare. This approach allows me to remove the top surrounding bolts and replace with a spare while leaving the mounted body with lines attached in place. This approach allows cleaning aqccess to the body but eliminates the removal and installation of the part of the pump that is most difficult and prone to creating additional issues and allows the installation of the electric section with diaphragm by just screwing in the multiple bolts. Sometimes diaphragm adjustment will improve performance but is easily done at the time and requires no additional tools.
I must admit, since we discovered the TSV for the points trigger and canceled further effort on our optical trigger project (create sound similar to points, and any number of other additions), I keep the prototype as a spare to, in small part, validate our efforts. However, the guys I worked with were great and I learned how to design and make printed circuits.
Ray(64BJ8P1)