Alex Scott
- Jul 3, 2014
- 18
- Joined
- Jul 3, 2014
- Messages
- 18
Hey guys, so I've got this kit as i'm new to the world of electronics and plan to learn, so I have these DIY kits that provide you with the components and a PCB and you solder it all yourself, I have made plenty of these successfully, my soldering technique is fine, all the solder joints appear to be fine however i'm having an issue.
There are 2 PCB's to this project, one transmitter and receiver. Both have LEDs on the end and when that path is blocked, a sound/alarm is made through a speaker.
Now everything appears to be fine except when I turn the PCB with the speaker on, it just constantly makes the noise. Now I know both parts are working, when I place the transmitter infront of the receiver, the frequency slightly changes so the 2 units are definitely registering that the other unit is there and everything appears to be working fine and the LED's are "seeing" each other. I have plenty of tools and a multimeter to test things, where would I begin testing what is wrong here?
This is a link to the unit in question, I have attached 2 photos of my completed boards. Thoughts on any of this?
http://www.velleman.co.uk/contents/en-uk/p46.html
There are 2 PCB's to this project, one transmitter and receiver. Both have LEDs on the end and when that path is blocked, a sound/alarm is made through a speaker.
Now everything appears to be fine except when I turn the PCB with the speaker on, it just constantly makes the noise. Now I know both parts are working, when I place the transmitter infront of the receiver, the frequency slightly changes so the 2 units are definitely registering that the other unit is there and everything appears to be working fine and the LED's are "seeing" each other. I have plenty of tools and a multimeter to test things, where would I begin testing what is wrong here?
This is a link to the unit in question, I have attached 2 photos of my completed boards. Thoughts on any of this?
http://www.velleman.co.uk/contents/en-uk/p46.html