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Discussion Starter · #1 ·
has anyone ever disected a defective regulator, and mapped out the circuit board? If you have the one-line diagram, I'd be interested in seeing it! Thanks! I found out my regulator was cooked, and thought I would play around with it. Some of the components on the board are not labelled--just don't want to reinvent the wheel, if someone already mapped it out! Thanks!
 

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Just though I'd add that the linked DIY circuit uses a 7805 because the 7807 is

tricky to get hold of in small ( cheap) quantities the UK

I believe the 7807 can be bought easily from Mouser or Digikey? in the USA

and is simpler and preferable

Do use a heatsink though
 

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Discussion Starter · #5 ·
Thanks for the posts guys; I found those links last night--what a time saver; thanks for putting in the time to figure all of that out for us NON-electricals.



I am curious as to the function of the original components; After heating up the original black case in some boiling water and removing potted circuit board, I picked away all of the potting material to find a Regulator (labelled D235), 4 resistors of varying ohm values, three diodes, 1 capacitor, and maybe a measuring transistor all mounted onto a small board.



Does the newer IC Regulator, Heat sync, and 5mm Green LED replace and negate all of the components from the original board?
 

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Discussion Starter · #7 ·
Fantastic Pics Reg! thanks for all of your help everyone. Off to Radio Shack in the AM to nab me some fine gauge solder & IC Regulator & a 5mm Green LED with a heat sink...will it hurt to pot it in the old housing using reagular hot glue from a hot glue gun?
 

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Fantastic Pics Reg! thanks for all of your help everyone. Off to Radio Shack in the AM to nab me some fine gauge solder & IC Regulator & a 5mm Green LED with a heat sink...will it hurt to pot it in the old housing using reagular hot glue from a hot glue gun?


I often use hot melt glue to keep the weather out of my bike gadgets and

it works pretty damn good as well.

One of the pics shows a 7Vreg I refurbed potted the same way

 

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Discussion Starter · #9 ·
well great news...the temperature gauge is now functioning very well! Thanks for all of the input and for those that figured this stuff out! used the 7805 and 5mm Green LED--replaced the old ground wire. soldered them up Saturday morning, tested in the afternoon with great success and for less than 6 dollars US. Watched several cycles of the thermostat open & close much to my delight. Potted up the new circuit inside the old regulator case using hot glue; thanks again all, one less gremlin eh?!
 

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well great news...the temperature gauge is now functioning very well! Thanks for all of the input and for those that figured this stuff out! used the 7805 and 5mm Green LED--replaced the old ground wire. soldered them up Saturday morning, tested in the afternoon with great success and for less than 6 dollars US. Watched several cycles of the thermostat open & close much to my delight. Potted up the new circuit inside the old regulator case using hot glue; thanks again all, one less gremlin eh?!


They really do work well.Mine's still operating fine and cost less than a fiver
 

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Discussion Starter · #11 ·
They really do work well.Mine's still operating fine and cost less than a fiver


...of course I did have to purchase 2 green LED's....they only came in two packs
thanks again for all the help!
 
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