LiPo Amigo PWR switch

Support
1

Hi,

On the LiPo Amigo there’s a power switch. Is the switch a latching or momentary switch? Can the board be set to always on?

Thanks

2

It’s a momentary push button.switch.

3

Thanks for that. I’ll have to short the switch, then.

4

I wouldn’t. Not without seeing what happens when you hold the button down. It might not be what you think. I have one and you have made me curious. I’m going to try some things tomorrow and post back.

5

Okay. Thanks for that. It looks like it’s going into a SR flip flop, via a Schmitt trigger. But it goes into the clock of the flip flop.

6

Thinking about this, it may be more interesting to see what happens with the button not pressed? I have, I think, similar interests. I have plans to use one in a setup that will have no easy access to the Amigo Pro.

7

I’m planning on daisy chaining it to a Wide Input Shim, to form part of a safe powerdown circuit for a Raspberry Pi.

8

Ah, OK. Mine is going to be battery backup for a remote Pico Weather Station setup.

9

Ah, fun. Have you looked at one of these as a possible solution?

10

I have one on a Pico. Same thing but different? ;)
How I soldered on my PICO LIPO Shim - Discussion / Projects - Pimoroni Buccaneers

11

Ah, you’re ahead of me.

12

Jumping in, can somebody confirm…

On the Lipo Amigo Pro, the “SW” breakout is shown on the diagram as “Power switch toggle circuit”. Yet it’s designed to connect to a “momentary push button switch”, as described above.

I attached a push button and the board then adds its own latching system, effectively. I press the button once and the board turns on and stays on. I press the button again and it turns off and stays off.

It makes no sense to me to have a push button that’s latched by the board. The button will be on the back of my device (a toy coffee grinder) and could get pressed accidentally, draining the battery. I’d rather attach a rocker switch for my “On” button, so that when the switch is on the Amigo Pro is on and when the switch is off the Amigo Pro is off.

Is this not possible with the design of the Amigo Pro?

Many thanks!

13

You could wire up a latching switch in series with a momentary button. When the switch is Off, pressing the button will do nothing. It’s not ideal but it will work.
Rocker Switch