Cannot read chinese for the linked receiver LEDs. Can anyone ?
Am after energizing a circuit for 5 minutes triggered by signal activity/presence at a particular channel on ~119MHz. Simple AM receiver, simple relay or mosfet to deliver power.
A timer IC can take care of the duration; using an existing receiver would work by tapping its LEDs when squelch opens, like :
----> https://www.aliexpress.com/item/110...rch0104.8.80.3f0a57b0Zxh9qs&priceBeautifyAB=0
Am after energizing a circuit for 5 minutes triggered by signal activity/presence at a particular channel on ~119MHz. Simple AM receiver, simple relay or mosfet to deliver power.
A timer IC can take care of the duration; using an existing receiver would work by tapping its LEDs when squelch opens, like :
----> https://www.aliexpress.com/item/110...rch0104.8.80.3f0a57b0Zxh9qs&priceBeautifyAB=0