/technologies/test-and-measurement/b/blog/posts/the-modular-bench-power-supply-testing-it-all-on-the-bench-with-the-breadboardBack to the Main post The Modular Bench Power Supply ++, The Essential DIY Build for Every EE Student and Old Timer alike... Ok, so based on the last two or three videos an posts it is time to test everything out on the bench with a breadboard a...en-USTelligent Community 12https://community.element14.com/technologies/test-and-measurement/b/blog/posts/the-modular-bench-power-supply-testing-it-all-on-the-bench-with-the-breadboardWed, 06 Jul 2016 22:19:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ffa4893e-ff02-41e4-86b7-aeed7d5ee158nikolajbrinch1<p>Hi Peter,</p><p>&nbsp;</p><p>I love your series on the power supply. Of course ideas about soft start, short circuit protection, bleeder resistors and output on/off comes to mind, as other modules that I would like to see integrated in the design. I must say that the simplicity and the use of that beefy MOSFET, and the theory and use of the op-amps are all extremely nice, and well laid out.</p><p>&nbsp;</p><p>One thing I need to have confirmed is, that the control-circuit that needs +/- 12V is a different power source all together? So i.e. 4x9V cells in series with a center tab could provide the power (in theory - in practice a dual source with a separate transformer, rectifier, caps and regulators - 7812/7912 probably)?</p><p>&nbsp;</p><p>Furthermore, there is an op-amp in the schematic on the +/- 12V input, is that to be disregarded as a symbol of how to connect the other 4 op-amps?</p><img src="https://community.element14.com/aggbug?PostID=20951&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/technologies/test-and-measurement/b/blog/posts/the-modular-bench-power-supply-testing-it-all-on-the-bench-with-the-breadboardSun, 26 Jul 2015 09:19:44 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ffa4893e-ff02-41e4-86b7-aeed7d5ee158paulv0<p>Hi Peter,</p><p>&nbsp;</p><p>I also left this msg on your blog.</p><p>There is a small error on the diagram.</p><p>The +12V is labeled +2V.</p><p>You may want to clean-up the connections to the feedback resistor of the voltage comparator.</p><p>Your schematic capturing probably messed that up.</p><p>&nbsp;</p><p>Looking forward to the next episode, I&#39;m glued to the Tube.</p><p>&nbsp;</p><p>Paul</p><img src="https://community.element14.com/aggbug?PostID=20951&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">