Go Down

Topic: TH/SMD Protoboard, Adj Reg, 9V Battery (Read 3288 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.
The art of getting good answers lies in asking good questions.

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.
The art of getting good answers lies in asking good questions.

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 *)

Go Up