Broken Pack - Electronic Circuits Projects Diagrams Free

sdhog · 1st May 2009, 03:23 AM

I have a unique problem I'm looking to solve. I'm a software engineer by trade, but spend most of my free time riding my Harley with a large group of riders. One of the problems we have is sending hand-signals forward to the pack leader. I was thinking about a electronic solution. I'd like to build a small battery powered FM transmitter/receiver. The solution would be mounted onto the handlebar, contain a button/switch and a LED. When we needed to send an alert, one would activate the transmitter - turning on all of the frequency matched LEDs on the other units. Any suggestions?

ccurtis · 1st May 2009, 03:40 AM

You are unlikely to get the needed range with a legal, unlicenced, FM transmitter. You might consider the Family Radio Service (FRS) which would give the needed range. There are FRS walkie-talkies which are rather inexpensive and some of them give an audible tone indication when a user transmits ("call button" feature). This can be used to activate an LED fairly easily with an added circuit. Maybe some of them even have an LED indicator.

Sceadwian · 1st May 2009, 05:50 AM

FRS radios are quiet reasonably priced and that makes things legal.

tcmtech · 1st May 2009, 06:03 AM

Digikey has a very amazing and broad selection of RF transceiver devices. They have some wireless communication and related transmitter and receiver units that are rated at around 250 meters outdoors. I did not check all of the specs but there are many different systems available and some probibly have even greater ranges.

The prices range from around $20 on up. I would suspect you could easily build a custom system with what they have.

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1st May 2009, 03:23 AM	#1
sdhog	Broken Pack I have a unique problem I'm looking to solve. I'm a software engineer by trade, but spend most of my free time riding my Harley with a large group of riders. One of the problems we have is sending hand-signals forward to the pack leader. I was thinking about a electronic solution. I'd like to build a small battery powered FM transmitter/receiver. The solution would be mounted onto the handlebar, contain a button/switch and a LED. When we needed to send an alert, one would activate the transmitter - turning on all of the frequency matched LEDs on the other units. Any suggestions?

1st May 2009, 03:40 AM	#2
ccurtis	You are unlikely to get the needed range with a legal, unlicenced, FM transmitter. You might consider the Family Radio Service (FRS) which would give the needed range. There are FRS walkie-talkies which are rather inexpensive and some of them give an audible tone indication when a user transmits ("call button" feature). This can be used to activate an LED fairly easily with an added circuit. Maybe some of them even have an LED indicator. Last edited by ccurtis; 1st May 2009 at 03:45 AM.

1st May 2009, 05:50 AM	#3
Sceadwian	FRS radios are quiet reasonably priced and that makes things legal. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

1st May 2009, 06:03 AM	#4
tcmtech	Digikey has a very amazing and broad selection of RF transceiver devices. They have some wireless communication and related transmitter and receiver units that are rated at around 250 meters outdoors. I did not check all of the specs but there are many different systems available and some probibly have even greater ranges. The prices range from around $20 on up. I would suspect you could easily build a custom system with what they have. __________________ "Issue a general safety warning. Then look the other way and allow stupidity the chance to eliminate itself." -- tcmtech "Those who can, Will. Those who can't, will achieve positions of power over those who can and then promptly stop them." -- tcmtech "Your impossibility may just be my day to day routine." -- tcmtech