Wish I could do it over

[green]

BYK1337 connected a 9v power adapter to his new scope. An unregulated power adapter output voltage is typically 1.4 to 1.5 times rated at low current draw. Probably wished he had measured the voltage before connected to his new scope.

Wish I had remembered to switch the scope probe to X10 when measuring PI coil volts.

Wish I had shorted the multi meter probes together to charge the power supply capacitors when trying to measure my PI detector current draw.

Wish I thought more about what I was doing the other day testing for EMI shielding. Connected a sheet of aluminum foil to +battery with a jumper lead. + battery was common when using a mono coil. Now control logic is 5volts with -volts connected to -battery. Foil touched an exposed control logic pin while I was trying things. Didn't like 12volts. Now I have to build another logic controller.

I would guess others have something they wish they could do over. I need to slow down and think before I do.

[Andi68]

I've already destroyed circuits with such unregulated power supplies.
Mistakes happen, especially if you are inexperienced.
You also learn from it ....

[homefire]

Lost track of how many times I loosed the Magic Smoke. Last time was with a cheapo DVM . I was use to one of my better ones. Half Asleep I had to check the Well Pump. Just grabbed the meter swung the dial to the right on 5oo Volt Range. OR SO I THOUGHT. On that meter it was the 500 Ohms Range. POOOOOOOOF Goes the Magic Smoke. Eaaa Never like that meter anyways.

[green]

Lost track of how many times I loosed the Magic Smoke. Last time was with a cheapo DVM . I was use to one of my better ones. Half Asleep I had to check the Well Pump. Just grabbed the meter swung the dial to the right on 5oo Volt Range. OR SO I THOUGHT. On that meter it was the 500 Ohms Range. POOOOOOOOF Goes the Magic Smoke. Eaaa Never like that meter anyways.

I've killed at least 3 of the cheap meters from Harbor Freight doing the same thing. Finally used a black marker to mark one end of the switch making it harder to mess up.

[ripsdevala]

I was create electric stove with pickini long time ago, nicee. Dont give up and do it over. Eventually all will learn from mistakes.

[6666]

Did you know that a 12f1840 runs quite happy on 13 volts no smoke.

[ripsdevala]

The PIC is okay, never burn it whatever my abuse, its the coil, become a vapor igniter.

[dbanner]

Discharged cathode ray picture tube(bleeding the anode cap from flyback transformer to chassis through a resistor), got called away, came back next day to remove the cap, wrong TV! I learned to mark everything in shop with sticky notes after that experience. And to check and DOUBLE CHECK everything.

[kt315]

Wish I had remembered to switch the scope probe to X10 when measuring PI coil volts.

guys
never do not measure the HV (high voltage) on PI coil by your scope. thats main rule for you.
why you are so blind if i write that millons times!

DO NOT TRY.

[waltr]

Wish I had remembered to switch the scope probe to X10 when measuring PI coil volts.

guys
never do not measure the HV (high voltage) on PI coil by your scope. thats main rule for you.
why you are so blind if i write that millons times!

DO NOT TRY.

Yep, it is a bad idea.
I use an 80:1 resistor divider (79k/1k) to provide a safe measurement point.

[Koala]

Discharged cathode ray picture tube(bleeding the anode cap from flyback transformer to chassis through a resistor), got called away, came back next day to remove the cap, wrong TV! I learned to mark everything in shop with sticky notes after that experience. And to check and DOUBLE CHECK everything.

Fetches back memories of someone repairing one of those table top space invader games. Somehow they managed to not to smash it while being zapped as they were lifting the CRT out.


Switched on a faulty PSU for there be a big bang and flash. The glass fuse vaporized leaving just the end caps.

[wayne,inspain]

I have 2 fluke multimeters that the previous owners at different times had used to check if their cattle fences were working, the fences were but their meters don't.