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Topic: TH/SMD Protoboard, Adj Reg, 9V Battery (Read 3380 times) previous topic - next topic

jluciani

I just released a new prototyping board. It features an SMD/TH prototyping
area, adjustable regulator and a receptacle for a 9V battery.
Pictures are at
http://wiblocks.luciani.org/iblocks/IPB/IPB-9V-index.html

The schematic is basically the same as the adjustable regulator on
the PICO. I will have the datasheet and schematic on the site in
the next couple of days.

(* jcl *)

------------------------------------
www: http://www.wiblocks.com
twitter: http://twitter.com/wiblocks
blog: http://luciani.org


PaulS

Price/mAh the worst possible choice for a power supply. Would be nice with a holder for 4 AA batteries, though.

Yeah, yeah, I know that would make it larger.

jluciani

For 3.3V and 5V it is very wasteful. It can be used at higher voltages by changing
a resistor (although most people will do 3.3V and 5V systems).

If the 4AAs are on the PCB the majority of the PCB area is consumed by the holder.
I figured that running two wires to the battery holes would be better. Maybe I
should add a two pin header in parallel with the 9V battery.

I was thinking of the following additions --

 2AAs and a simple TH boost converter (3.3V or 5V)
 Add a TH inverter for a negative voltage -- +-5V, +-3.3V
 Add a low Iq converter (SMD)

(* jcl *)



PaulS

Quote
Add a low Iq converter

I think one of the posters over the weekend used one of these. Seems to have worked quite well on him/her.

jluciani

Since I was doing a design panel I decided to prototype a new version of the
board with two AAs and a boost converter. The boost converter is 88-94% efficient
and runs at 1.2MHz.



Preliminary webpage is at --
http://wiblocks.luciani.org/iblocks/IPB/IPB-3V-index.html

(* jcl *)

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