22nd Oct 2018, 8:15 pm
|
#12
|
|
Hexode
Join Date: Jun 2018
Location: Buckinghamshire, UK.
Posts: 387
|
Re: Retired Texas TI99/4A engineer needs help please.
There's a gentleman here:-
http://www.stuartconner.me.uk/ti/ti.htm
-who writes:-
Quote:
The console motherboard, fitted with the TI Extended BASIC cartridge, draws the following current from the power supply board:
+5V: 950mA
+12V: 330mA
-5V:  Didn't measure it, but should be pretty low - probably just a few milliamps
On the 'standard' power supply board, the +5V regulator is a switched mode design, and the +12V and -5V regulators are of the linear type.
The NanoPEB draws from the +5V supply ~75mA 'at rest', rising to ~85mA when accessing the CF card .
|
Cheers
|
|
|