# DIY 12V Relai schematics right? **URL:** \ **Category:** General Electronics\ **Created:** [January 20, 2025, 1:14am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563 "2025-01-20T01:14:23Z")\ **Posts on this page:** 7\ **Page:** 2
**Author:** ![Wawa](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/wawa/32/1211303_2.png) [@Wawa](https://forum.arduino.cc/u/Wawa)\ **Post date:** [January 21, 2025, 6:21pm UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/21 "2025-01-21T18:21:23Z")
Do you mean a slight increase in noise. I think that doesn't matter here. I recently hand-soldered about 30 through-hole opto couplers, no problem. Failure depends on your soldering skills, and is not likely to happen if you keep soldering time at ~3seconds. You _should_ of course use a temp controlled iron, and know about ESD. Leo.. ---
**Author:** ![Crix1990](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/crix1990/32/1100152_2.png) [@Crix1990](https://forum.arduino.cc/u/Crix1990)\ **Post date:** [January 22, 2025, 1:40am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/22 "2025-01-22T01:40:23Z")
Hi Leo, thanks, than it should not be a problem. I'm soldering since 17 years and never killed a component with the iron πŸ˜‰ I just had some wired NOS audio transistors for a guitar effect, where the seller pointed out several times to never solder them and also in the diy-pedal forum many people told that there is a 50/50 chance to kill them if you solder them. There were also reports about complete dead ones...πŸ™„ Felix ---
**Author:** ![TomGeorge](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/tomgeorge/32/215261_2.png) [@TomGeorge](https://forum.arduino.cc/u/TomGeorge)\ **Post date:** [January 22, 2025, 1:44am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/23 "2025-01-22T01:44:07Z")
> [@Crix1990](#): > > I just had some wired NOS audio transistors for a guitar effect, where the seller pointed out several times to never solder them and also in the diy-pedal forum many people told that there is a 50/50 chance to kill them if you solder them. > There were also reports about complete dead ones...πŸ™„ Doesn't a destroyed component add to the creative distortion most guitar players are looking for? πŸ˜ƒ 🀣 πŸ˜„ Tom.... πŸ˜ƒ πŸ‘ β˜• πŸ‡¦πŸ‡Ί ---
**Author:** ![Crix1990](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/crix1990/32/1100152_2.png) [@Crix1990](https://forum.arduino.cc/u/Crix1990)\ **Post date:** [January 22, 2025, 1:56am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/24 "2025-01-22T01:56:52Z")
Well some of them believe in thatπŸ˜‚ But when there is no signal comming trough anymore, well then you build a "God thanks, nobody needs to listen to that guy" pedalπŸ˜‚ ---
**Author:** ![Wawa](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/wawa/32/1211303_2.png) [@Wawa](https://forum.arduino.cc/u/Wawa)\ **Post date:** [January 22, 2025, 2:28am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/25 "2025-01-22T02:28:25Z")
> [@Crix1990](#): > > audio transistors for a guitar effect Could be that they were JFET transistors, needed for the high impedance of a guitar pickup. You can indeed kill them with a soldering iron, but not because of the heat. They are destroyed with the slightest static discharge. A common trick when I used them half a century ago was to wrap the legs with a thin copper strand. Then solder, before pulling the wire out. And yes, I killed a few before someone told me that trick. Leo.. ---
**Author:** ![Crix1990](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/crix1990/32/1100152_2.png) [@Crix1990](https://forum.arduino.cc/u/Crix1990)\ **Post date:** [January 23, 2025, 12:44am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/26 "2025-01-23T00:44:46Z")
Hey Leo, yes I think it was about JFET and Germanium ones. Good hint with the wire. Regards, Felix ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [July 22, 2025, 12:45am UTC](https://forum.arduino.cc/t/diy-12v-relai-schematics-right/1344563/27 "2025-07-22T00:45:02Z")
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