[SOLVED] for all your hoby circuits and also .....read

[sick_man]

hoby circuits

for all your hobby circuits and also all your radios or other equipment that uses DC power 0 - ~ dc

the addition of a simple bridge rectifier inside or mounted on the power cable + to + volts - too - volts on the cable

and the two ac then becomes the supply

no matter which way round you place the supply you avoid blowing the radio or other delicate things up

this is dedicated too all the engineers and so called good cleaver designers out there use people by selling them equipment with the potential too blow up fast
with no means of escape if they get daft

and charge them a fortune for repairs

 

[ronbmy]

radio hoby

This is a better idea than a single protective diode and is worth the small amount of time and money for those of us that build our own equipment.

Manufacturers will not do this as they only want 2 things in life.

1. Rip off all the customers.

2. Pray to the God of money.

 

[barrybear]

This type of power input connection was used for some time by old car radio manufacturers. There are drawbacksthe the case must be isolated so as not to touch chassey. The aerial conection must be adjusted so that the coupling is compatable with ether polarity . and the radio will be vertualy .7 volt above the chassey potential and this can have problems with screening and noise.

In the old days when car earthing might be either + - then it was ascceptable but now vertually every car has negative earth so really the problem has gone away.

If you are unluky and connect your radio incorrectly the chances are it will blow the series fuze. the unit being protected by a reverse biased diode.

Barrybear