dual usb charger
Home
»
Categories
»
Telephon circuits
»
Ring tone
(Virtual ring tone ,busy ring tone)
Page : 1
«
1
Audio Visual Indicator for Telephones
This circuit does not require any external power
(10-Sep-2005)
---172
© 2005-2011 by www.coolcircuit.com . All rights reserved.
Licensed under a Creative Commons Attribution 3.0
License.
Privacy
