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A certain type of cordless optical computer mouse operates on two AA alkaline cells. It has no power on/off switch. When not in use, it automatically reduces power consumption by switching its light ...
If you’re using a LM2596 DC-DC converter module to power your gadget, you can add a touch sensitive soft switch for literally pennies. The trick is utilizing the enable pin on the LM2596.
These kits include (2) CM-336/42N narrow stainless steel switches, (2) CM-23DSER surface boxes, and a CM-RX-90 relay receiver. CM-336 narrow SureWave switch kits are in stock and ready for order.