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Search: Posts Made By: budm
Forum: General Electronics Technical Discussion 11-25-2015, 10:55 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

That is correct, the supply Voltage stays the same feeding the parallel loads, only the amount of current draw will change, you got the idea now.
Forum: General Electronics Technical Discussion 11-25-2015, 06:58 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

That is correct based on 12 boards, and then plus the control circuit and the display, so regulated 15V supply with 2A current capacity should be good.
Forum: General Electronics Technical Discussion 11-25-2015, 06:42 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

Hey, you got it now. So the power supply he sold you is on the over rated side as far as the current capacity is concerned. 15V 1/4A power supply will be good enough.
Forum: General Electronics Technical Discussion 11-25-2015, 06:00 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

So You are getting 2.116V between the two legs of the 150 Ohms resistor using 15V power supply, then 2.116V/150 Ohms = 14.1mA on each string of the LED, so 8 string = 14.1 x 8 =112.8mA for TOTAL...
Forum: General Electronics Technical Discussion 11-25-2015, 05:32 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

The current draw is dictacted by the load not by the power supply, I.E. you can use 12V 10A power supply but if the load only draw 1A, the 10A power supply will not cause the problem, it is when you...
Forum: General Electronics Technical Discussion 11-16-2015, 01:26 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

So you already bought the kit? It comes with step down power transformer?
Forum: General Electronics Technical Discussion 11-16-2015, 10:48 AM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

Do you have the wiring diagram that shows how the board is connected to the rest of the stuff?
Forum: General Electronics Technical Discussion 11-15-2015, 11:17 PM
Replies: 146
Views: 11,877
Posted By budm
Forum: General Electronics Technical Discussion 11-15-2015, 10:56 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

The output of the PIC PIN 2 net label K1 goes to the resistor R3 on the leg the resistor with net label 'K1' to turn on the the Transistor Q1 which drives relay K1 coil.
Pin 1 net label 'K2' of the...
Forum: General Electronics Technical Discussion 11-15-2015, 10:26 PM
Replies: 146
Views: 11,877
Posted By budm
Re: Need help reading a schematic.

The wiper of the pot P1 pin S (net label named 'Contrast') is connected to the LCD1 connector pin 3 (net label named 'Contrast'). As you can see there are only two net label with the same name...
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