# Schmitz White Noise Generator **URL:** \ **Category:** DIY STUFF\ **Created:** [March 5, 2020, 5:47pm UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355 "2020-03-05T17:47:47Z")\ **Posts on this page:** 6\ **Page:** 2
**Author:** ![fredrik](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/fredrik/32/682_2.png) [@fredrik](https://lookmumnocomputer.discourse.group/u/fredrik)\ **Post date:** [May 12, 2021, 9:21am UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355/21 "2021-05-12T09:21:35Z")
Check the supply rails. If they’re as expected, check that you’ve mounted the transistor the right way around, and try a few different transistors – not all of them provide the same noise levels. > [@Janvier](#): > > No white noise on the output Well, all electronic circuits generate some noise, so (assuming you’ve powered up the circuit) I’m pretty sure the problem here is the noise level, not the noise itself 😀 ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [May 12, 2021, 11:57am UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355/22 "2021-05-12T11:57:51Z")
I’d definitely recommend building any noise source on a solderless breadboard first so you can try several transistors. Some will work much better than others. Once you’ve got one that works well you can transfer the circuit to a stripboard. ---
**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\ **Post date:** [May 12, 2021, 5:51pm UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355/23 "2021-05-12T17:51:20Z")
If one has 3-pin female headers, you could solder that in, and pop the transistors in and out. > **[3 Pin 2.54mm Single Row Female Pin Header](https://www.taydaelectronics.com/3-pin-2-54-mm-single-row-female-pin-header.html)** > > GTK - Get It Fast - Same Day Shipping ---
**Author:** ![Janvier](https://avatars.discourse-cdn.com/v4/letter/j/b3f665/32.png) [@Janvier](https://lookmumnocomputer.discourse.group/u/Janvier)\ **Post date:** [May 12, 2021, 7:41pm UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355/24 "2021-05-12T19:41:57Z")
Thank you guys ! I soldered a 3pin header and was able to try different transistor. I had more luck with a 2n3904. I will definitely remember your advice and build noise on a breadboard before soldering. I’m amazed by the difference between two transistor by the way. Next step Sample and Hold ! ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [May 12, 2021, 7:46pm UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355/25 "2021-05-12T19:46:37Z")
Surely all you need is two pins. But for the permanent build I’d rather have the transistor soldered in. In addition, you might want to try varying the resistor on the emitter. ---
**Author:** ![Caustic](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/caustic/32/15588_2.png) [@Caustic](https://lookmumnocomputer.discourse.group/u/Caustic)\ **Post date:** [May 12, 2021, 8:44pm UTC](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355/26 "2021-05-12T20:44:55Z")
I was just meaning in general use some female headers if you are going to plug in many things. I assumed 3 since transistors usually have 3 pins. I know a lot of schems clip the middle leg, but youknowwhatimean. [Previous page](https://lookmumnocomputer.discourse.group/t/schmitz-white-noise-generator/355.md?page=1)