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interfaces:fs1000a [2016/02/21 22:30] darroninterfaces:fs1000a [2016/03/23 19:55] (current) darron
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-==== FS1000A ====+==== FS1000A & RF-5V ====
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 {{:interfaces:fs1000aX2.jpg?200}} {{:interfaces:fs1000aX2.jpg?200}}
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 +{{:interfaces:rf-5v.jpg?200}}
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 {{:interfaces:fs1000a.jpg?200}} {{:interfaces:fs1000a.jpg?200}}
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 same plot we can see a faint signal from another device which is same plot we can see a faint signal from another device which is
 exactly 433.92 MHz. exactly 433.92 MHz.
- 
-The 315 MHz transmitter is not legal where I live, however, due to 
-the incompetence of one eBay seller I have one for testing. 
  
 These devices work fine using 3V3 or 5V for VCC and the digital input named These devices work fine using 3V3 or 5V for VCC and the digital input named
-DATA or ADAT or ADAT upside down works equally well at 3V3 for 3V3 VCC+DATAADAT or ATAD works equally well at 3V3 for 3V3 VCC
 or 5V VCC. or 5V VCC.
  
-The digital input floats at a around -0.8V when unconnected.+To complement the FS1000A, the RF-5V (or equivalent) existsThis receiver 
 +module works okay at 3V3 for short distances but is rated for 5V operation 
 +which is needed for longer distances. It would appear 
 +that 5V is required to operate the AGC circuit on the board. The AGC can 
 +produce high levels of noise on the output when no signal is broadcast from 
 +the FS1000A. 
 + 
 +The second photo here shows the receiver. In this setup the output is 
 +fed into a cheap USB sound card whilst the FS1000A sends an AFSK signal. 
 +On the receiver host minimodem is used to decode the message reliably.