Wireless remote switch, button press: 1 second=ON, 3 seconds=OFF

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Here is LTspice of the 1s and 3s hold for OFF using pulses from V1 which is imitating the 60Hz converted to 0.7vdc from previous LTspice.  
 
Here is LTspice of the 1s and 3s hold for OFF using pulses from V1 which is imitating the 60Hz converted to 0.7vdc from previous LTspice.  
See 3 second delayed OFF and instant-ON effect:
+
See 3 second delayed OFF and instant-ON effect in green. Blue is the button held down for 8 seconds each time:
 
[[File: LTspice_V1_bluePress8seconds_blue_givesON-OFF_7v_outputs.png]]
 
[[File: LTspice_V1_bluePress8seconds_blue_givesON-OFF_7v_outputs.png]]

Revision as of 10:36, 3 October 2016

I bought a 315Mhz transmitter/receiver pair of postage stamp size boards from robotshop.com. Ebay has them too.

Here is the schematic of how I used the data output of the receiver:

315Mhz schematic.png

Here is the board layout, which should be redone in surface mount parts some day. I used drawer junk parts and old VCR parts: 315Mhz wireless remote-switch 120vac-off-on.png

Here is the LTspice simulation of the signal filter of data incoming ON and OFF button presses. This 2Hz to 12000Hz response curve shows 60Hz is near the peak response: LTspice of data input filter 2Hz-12000Hz.png

After the diode and 47uf capacitor, the signal is 0.7vdc with some ripple. High frequency data would not get through, and neither will lightning pulses. I have a commercial remote switch that was triggered ON by lightning and that is not acceptable, thus my filter idea using 60Hz pulses. LTspice 60Hz for 1second goes through to Q2 as 0.7vdc.png

Here is LTspice of the 1s and 3s hold for OFF using pulses from V1 which is imitating the 60Hz converted to 0.7vdc from previous LTspice. See 3 second delayed OFF and instant-ON effect in green. Blue is the button held down for 8 seconds each time: LTspice V1 bluePress8seconds blue givesON-OFF 7v outputs.png

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