FM transmitter does not work on breadboard
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Posted by chriswilliams on August 30, 2006, 1:30 pm
Please log in for more thread options I have armed an FM transmitter on breadboard but for some reason it does not work. I have checked wiring and components and all seems to be OK. Thanks in advance for any comment | ||||||||||||||||
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Posted by BobG on August 30, 2006, 1:44 pm
Please log in for more thread options chriswilliams wrote: 'Armed' is a funny word to use. Like 'Cocked'... like you have a static hi or lo level on the tx line. You need to hook it to a TTL level serial port sending ASCII 'U' over and over at a slow baud rate like 1200 baud. Should be able to see stuff coming out of receiver at same rate! | ||||||||||||||||
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Posted by Christopher on August 30, 2006, 2:05 pm
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Hello Chris, On 30 Aug 2006 10:30:37 -0700, "chriswilliams" >I have armed an FM transmitter on breadboard but for some reason it
>does not work. I have checked wiring and components and all seems to >be OK. By breadboard you mean one of those white plug-in proto boards? One area of trouble I found is the many rows of plug in contacts behave like 5 pf capacitors shorting out the RF. Use a generic copper pad perf board and solder. Good Luck, * * * Christopher Temecula CA.USA http://www.oldtemecula.com | ||||||||||||||||
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Posted by Eeyore on August 30, 2006, 9:06 pm
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chriswilliams wrote: > I have armed an FM transmitter on breadboard but for some reason it
> does not work. I have checked wiring and components and all seems to > be OK. What style of RF construction did you use ? Graham | ||||||||||||||||
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Posted by chriswilliams on August 30, 2006, 10:29 pm
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> What style of RF construction did you use ?
It's a simple FM transmitter with three transistors and an oscillator. | ||||||||||||||||
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> does not work. I have checked wiring and components and all seems to
> be OK.