Cobra 148 GTL 148 GTL 148 GTL Servisní příručka stáhnout pdf (Strana 17)

ting Volt

One

point which is MOST important is the operating voltage of the

Eprom. All those

currently available require a supply voltage of 4.75 to 5.25 volts. A

zener

stabilized supply

is essential and I would further recommend the use of a transistor series regulator. The

transistor should be rated at

1 Watt minimum, especially for older

Eproms whose operating

current could exceed 100

milliamps.

Alternatively, you could use a regulator device, such as a 7805. This is more expensive

than a transistor alone but requires no

zener diode or resistor. Regulators are available in

various sizes and ratings from 78L05 (100mA) to 7805 (1A).

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Cobra 148 GTL 148 GTL 148 GTL Servisní příručka Strana 17