Re: Convert native character string to ASCII array of integers

Morris Dovey <mrdovey@xxxxxxxx> writes:

Tomás Ó hÉilidhe wrote:

If any of the chips made an error, there could be a short
circuit from 5 V to 0 V which would fry the chips, the power
transistors, and also the voltage regulator.

The finished product has been plugged in constantly
overnight for the last two nights and hasn't had a hiccup.

I'm reminded of an early computer cash register system in a gas
(petrol) station that worked without problem for over a year and
a half - until a police car pulled in for refueling. Just as the
car arrived, the dispatcher called on the radio and when the
policeman responded, his transmitted signal killed the pump
controller which, in turn, killed the cash register.

It might not be a bad idea to add those inexpensive
current-limiting resistors...

:-)

Or even better, just shield the electronics properly. You would not put
"current limiting resistors" in either - you would probably use some
active surge detection circuit which dissipates any peak voltages.

.

Relevant Pages

  • Re: Convert native character string to ASCII array of integers
    ... transistors, and also the voltage regulator. ... overnight for the last two nights and hasn't had a hiccup. ... I'm reminded of an early computer cash register system in a gas ...
    (comp.lang.c)
  • Re: DC limiter
    ... circuit, your simulation or your results we can't tell you where you ... OK - have fun swearing at the internet - oooh, ... need to simulate this at all and that on the basis of your simulation ... Assuming you don't want too big a voltage drop in your voltage regulator ...
    (sci.electronics.design)
  • Re: 700v regulator circuit help???
    ... I need to built a voltage regulator with the following parameters ... 700 volt @ 250mA with current limiting. ... but finding a circuit is not easy. ... to handle a short, so you'll need more than one power MOSFET, ...
    (sci.electronics.design)
  • Re: How to caliberat voltage regulator
    ... voltage regulator to get 9V using the following circuit: ... above circuit is the use of a bridge rectifier W02 8169, ... At what voltage the Pot. ... I do have digital volt meter and I did tweak the pot to 9 volts ...
    (sci.electronics.basics)
  • Re: How to caliberat voltage regulator
    ... voltage regulator to get 9V using the following circuit: ... above circuit is the use of a bridge rectifier W02 8169, ... the bread board, ... Try presetting the pot to 744 ohms with a digital meter. ...
    (sci.electronics.basics)