just trying to build a small switch and this is what I came up with.
the first one worked but using the copper straps for connecting to wires not to great ..should have used a heatsink.. the bridge came unglued..
used circuit board to build it. soldered together is stronger then gluing it . the contact gap is copper grounding strap and cuts easy with sissors. the gap ...removed copper from circuit board in center to isolate then soldered the bridge pieces and wires in one shot. when heated used a sewing needle to hold it down till cooled. on similar switches I build before I bend up the edge of the copper strap about an eights for the bridge and worked out the best ..so on this one did the same. the spring is from a ballpoint pen cut inhalv
then used a lockink plyers to hold the part ..adjusted the tension and made sure it runs free and soldered it .
to contact the bridge I found a little plastic tube which holds a short section of the spring the good side out to make the contact.
used two part silicone mold making putty to fill the back of tube ..pushed on to shaft and let cure ..this stuff will not glue to anything and so far have not found any glue which works on it . so build up the end of the shaft with solder ..then pushed on .
leaving the one turn of the spring showing makes the contact selv adjusting and makes a very reliable switch ..made some before and all are working without any problems ..
the first one worked but using the copper straps for connecting to wires not to great ..should have used a heatsink.. the bridge came unglued..
used circuit board to build it. soldered together is stronger then gluing it . the contact gap is copper grounding strap and cuts easy with sissors. the gap ...removed copper from circuit board in center to isolate then soldered the bridge pieces and wires in one shot. when heated used a sewing needle to hold it down till cooled. on similar switches I build before I bend up the edge of the copper strap about an eights for the bridge and worked out the best ..so on this one did the same. the spring is from a ballpoint pen cut inhalv
then used a lockink plyers to hold the part ..adjusted the tension and made sure it runs free and soldered it .
to contact the bridge I found a little plastic tube which holds a short section of the spring the good side out to make the contact.
used two part silicone mold making putty to fill the back of tube ..pushed on to shaft and let cure ..this stuff will not glue to anything and so far have not found any glue which works on it . so build up the end of the shaft with solder ..then pushed on .
leaving the one turn of the spring showing makes the contact selv adjusting and makes a very reliable switch ..made some before and all are working without any problems ..
