# Look Sam No Smoke - Module Power up **URL:** \ **Category:** KOSMO MODULES\ **Created:** [May 17, 2020, 6:19pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923 "2020-05-17T18:19:23Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 17, 2020, 6:19pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/1 "2020-05-17T18:19:23Z")
Ok no pictures , but I got my MicroBus PSU powered up and then finally started to fit the power connectors on the modules, power them up chipless and then with chips… These are all power tested… No pops , bangs or smoke… LFO ASDR DUAL VCA Performance Filter These ones to finish off tomorrow. QUAD VCA VCO Just leaves the Molex to Jack wires to do… And swappinf out the wrong prescion regualtor on the VCO… SO CLOSE!!! Rob ---
**Author:** ![antoine.pasde2](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/antoine.pasde2/32/326_2.png) [@antoine.pasde2](https://lookmumnocomputer.discourse.group/u/antoine.pasde2)\ **Post date:** [May 17, 2020, 6:40pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/2 "2020-05-17T18:40:35Z")
> [@twinturbo](#): > > And swappinf out the wrong prescion regualtor on the VCO Care to elaborate on that one? I was thinking, since on the #1222 the regulated 5V is connected to the Arduino’s Vin instead of 5V pin and doesn’t go anywhere else, maybe it would make sense to use a 7808 8 volt regulator instead of the 7805. ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 17, 2020, 6:58pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/3 "2020-05-17T18:58:35Z")
The 4040AIZ 4.1 - I was not paying attention when buyingand got a 10V, only realised during the thread on the little begger the other week. Not looked at the schematic in terms of the 5V line, I do’t see why you could not put a 780x in and run to VIN. I am not sure what advantage there would be either way, you could just run in the +12v line I guess and dispense with the reg altogether… I alway use +5 . I guess of board regulation will let the chip run cooler. ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [May 17, 2020, 7:01pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/4 "2020-05-17T19:01:03Z")
> [@twinturbo](#): > > power them up chipless and then with chips… it is not bad for the circuit to put the current in a module without chip ? ---
**Author:** ![antoine.pasde2](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/antoine.pasde2/32/326_2.png) [@antoine.pasde2](https://lookmumnocomputer.discourse.group/u/antoine.pasde2)\ **Post date:** [May 17, 2020, 9:10pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/5 "2020-05-17T21:10:29Z")
> [@twinturbo](#): > > you could just run in the +12v line I guess and dispense with the reg altogethe Yeah, you probably could, I just feel it would look cleaner with a regulator since that’s what the PCB calls for. ---
**Author:** ![antoine.pasde2](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/antoine.pasde2/32/326_2.png) [@antoine.pasde2](https://lookmumnocomputer.discourse.group/u/antoine.pasde2)\ **Post date:** [May 17, 2020, 9:12pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/6 "2020-05-17T21:12:11Z")
Usually it’s not a problem as the chips are what is the most likely to be damaged if the power supply is inverted or connected to the wrong place. ---
**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 17, 2020, 9:19pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/7 "2020-05-17T21:19:48Z")
> [@twinturbo](#): > > The 4040AIZ 4.1 - I was not paying attention when buying and got a 10V You could probably use a 10 V, since the 4.000 V reference voltage is taken from the other side of a voltage divider trimmer; you just end up with the trimmer in a different position. You may have to tweak the R42 series resistor, though, but iirc someone did the math and the current value (220 ohm) is too low for 4 V anyway so might work as is for 10 V. EDIT: (12 - 10) / 220 = 0.9 mA max through the reference, which is so nicely positioned between the 100 uA min and the 15 mA max that you’d think it was designed for 10 V 🙂 ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 17, 2020, 9:24pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/8 "2020-05-17T21:24:10Z")
I guess it’s a gamble either way. Other two modules now have the power. Spent half the live stream crimping molex connectors. ---
**Author:** ![Jos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jos/32/151_2.png) [@Jos](https://lookmumnocomputer.discourse.group/u/Jos)\ **Post date:** [May 17, 2020, 10:22pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/9 "2020-05-17T22:22:12Z")
What makes you think so? ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [May 17, 2020, 10:35pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/10 "2020-05-17T22:35:41Z")
it was a question, I was wondering if it could be bad for some components, but now I understand that no ---
**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 17, 2020, 10:43pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/11 "2020-05-17T22:43:25Z")
You could design a circuit that can damage some passive components if not all active components are there, or even damage the missing components when you add them later, but that requires effort 😃 I don’t think you have to fear this for your usual DIY stuff. (well, ok, if you power things up and insert the missing components in a powered circuit, all bets are off.) ---
**Author:** ![antoine.pasde2](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/antoine.pasde2/32/326_2.png) [@antoine.pasde2](https://lookmumnocomputer.discourse.group/u/antoine.pasde2)\ **Post date:** [May 18, 2020, 2:05am UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/12 "2020-05-18T02:05:22Z")
> [@fredrik](#): > > even damage the missing components when you add them later Now that you mention it, didn’t someone (you?) link to a video of the Super Simple Oscillator where that actually happened? You had to make sure to discharge the capacitor or you’d blow the transistor when adding it to the circuit. ---
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [May 18, 2020, 6:01am UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/13 "2020-05-18T06:01:13Z")
burnt up components and circuit traces usually only happen on high power stuff like power amps. a friend of mine repairs music equipment , etc. he has shown me some real cooked shit over the years . like whole circuit boards lost [no way to id the components] . you talk about bad smelling , that stuff reeks . ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 18, 2020, 6:20am UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/14 "2020-05-18T06:20:06Z")
I had a cheap Hi-Fi Amp that came to me wiith a blown track. I am no diagnostics expert but as it was a dead loss anyway I repaired the track… And it held, more than long enough for another track to blow… Both tracks were easily traced to one of a pair of large Darlington Drivers, 3 in the stereo pair were seemingly ok, this one was fully shorted… £3 later, one more track repair and I was in business 🙂 The comments on the live stream for the Quad VCA mention Sam powering up with the chips in 1st Go. I think the biggest risk we have seen here is either sockets being soldered in the wrong way so the chip is in back to front, or just putting the chip in back to front… Fortunately I have been playing with socketed IC’s for 30 years ( ouch ) so I am reasonably proficient… Rob ---
**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 18, 2020, 7:06am UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/15 "2020-05-18T07:06:33Z")
Yeah, I’ve posted [the avalanche disaster video](https://youtu.be/DCc1zxuAsmw) here a couple times, and I have a big bold section about discharging in the simple oscillator post, so I guess “takes effort” wasn’t entirely accurate 😃 (his circuit was powered on, though, so strictly speaking that falls in the “all bets are off” category, but on or off doesn’t matter that much if you have a low leakage 100 uF capacitor charged to full supply voltage in the circuit… 1.5 mC might only be 1/10000 of a lightning bolt, but can be a bit too much for a single transistor…) ---
**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\ **Post date:** [May 18, 2020, 11:58am UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/16 "2020-05-18T11:58:26Z")
My Frequency Central MicroBus will power the LED’s for minuets with no other load when disconnected. So I always remove the Module from the power and let it sit a little… Rob ---
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [May 18, 2020, 11:29pm UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/17 "2020-05-18T23:29:39Z")
> [@fredrik](#): > > 1/10000 of a lightning bolt LOL is that a technical term for what happens when we F@#\* up . ---
**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 19, 2020, 12:09am UTC](https://lookmumnocomputer.discourse.group/t/look-sam-no-smoke-module-power-up/923/18 "2020-05-19T00:09:44Z")
Yeah, thats normal. Those are some chungus caps.