RF receiver - Electronic Circuits Projects Diagrams Free

magnumpi67 · 20th April 2004, 01:09 PM

can someone tell me how this thing works. If the web address won't open, do a copy and paste on the address bar. I also need to break the circuit down into different blocks. The circuit is at: http://www.velleman-kit.com/Download...nual_K6727.pdf. scroll down to page 15. it's in pdf format.

k7elp60 · 20th April 2004, 02:46 PM

Looking at the schematic-T1, A1 and A2 are the receiver. From the specifications I would say that the receiver receives a series of pulses from the transmitter and depending upon the code it activates relay 1 or 2.
Do you have some more specific questions?

Sebi · 20th April 2004, 04:08 PM

The decoder part is simply, just read the datasheet.(two decoders with different setup codes.)
The receiver part also a most common solution:

magnumpi67 · 20th April 2004, 10:31 PM

What about the 2 flip-flops, what are they supposed to do in this circuit?

k7elp60 · 20th April 2004, 11:55 PM

The flip-flops are to keep the relays energized for a period of time depending upon the programing.

magnumpi67 · 21st April 2004, 02:04 PM

Looking at the schematic for the superregenerative receiver, I know R1 and C4 acts as a noise filter, R4 and R5 together is a voltage divider that provides proper biasing at the base of the transistor. I can't firgure out what C8 and L1 do and also C3 and L2. CV1 is a tuning capacitor. I know the signal goes through R6. What about R2, is it part of the noise filter?

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20th April 2004, 01:09 PM	(permalink)
magnumpi67	RF receiver can someone tell me how this thing works. If the web address won't open, do a copy and paste on the address bar. I also need to break the circuit down into different blocks. The circuit is at: http://www.velleman-kit.com/Download...nual_K6727.pdf. scroll down to page 15. it's in pdf format.

20th April 2004, 02:46 PM	(permalink)
k7elp60	rf receiver Looking at the schematic-T1, A1 and A2 are the receiver. From the specifications I would say that the receiver receives a series of pulses from the transmitter and depending upon the code it activates relay 1 or 2. Do you have some more specific questions? __________________ The great thing about electronics is unlimited ways to do the job. The only limit is one\'s imagination. I generally think my way is best. Show me a different way. I have an open mind.

20th April 2004, 10:31 PM	(permalink)
magnumpi67	Thank for the help k7elp60 and sebi What about the 2 flip-flops, what are they supposed to do in this circuit?

20th April 2004, 11:55 PM	(permalink)
k7elp60	rf receiver The flip-flops are to keep the relays energized for a period of time depending upon the programing. __________________ The great thing about electronics is unlimited ways to do the job. The only limit is one\'s imagination. I generally think my way is best. Show me a different way. I have an open mind.

21st April 2004, 02:04 PM	(permalink)
magnumpi67	Looking at the schematic for the superregenerative receiver, I know R1 and C4 acts as a noise filter, R4 and R5 together is a voltage divider that provides proper biasing at the base of the transistor. I can't firgure out what C8 and L1 do and also C3 and L2. CV1 is a tuning capacitor. I know the signal goes through R6. What about R2, is it part of the noise filter?