Powah-1 and Powah-2

Community Project Proposal
#1

O.K. I will only post text now, but I though people would not be interested in widget talk without proof that my designs are legit and real products by way of photos and schematics. Oh well.

Powah-1, a .5" x .5" board module that fits on a breadboard, but can be used as a motion-control limit sensor, anti-tamper switch, etc. It can switch any CMOS signal, and draws nearly unmeasurable current in the quiescent state.

Powah-2, a .5" x .8" board module that also fits on a breadboard, can be used in similar applications, but has two additional features. One, it can switch up to 18V because of the matched complementary MOSFETS intended for beefy automotive applications. A barrier diode limits gate voltages to 5.1V for safety. Two, the button turn-on and turn-off times are different, also for safety. The example in the (soon to be posted) schematic sets a 100ms button on time, and a full 3s button off time.

I have calculated potential pricing based on the 4X parts cost rule-of-thumb, but I don’t know if that is (yet) appropriate here.

J.R. Stoner
Bifrost Development Group

#2

Was it designed by you?

Could you show it more detailed?

#3

Let’s see if the forum will let me do pictures…

Powah-1, front view:

Powah-1, back view:

Powah-1, schematic:

Powah-2, schematic:

#4

I saw Powah-1 featured on Dangerous Prototypes a few weeks ago. This is the first time I’ve seen Powah-2. Both look to be useful and elegant designs, and glad to see you’re advancing them.

One question - why is the soft turn-off on Powah-2 so long (3 seconds)?

#5

The diagrams helped me to understand things upto some extent.Still things are not clear in my mind.