http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2008-12-01T23:22:11-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t10282.html 2008-12-01T23:22:11-08:00 Hi. Does anyone know how to piggybag a switch to a potentiometer? Like in this diagram http://www.8051projects.net/forum-t10282.html 2008-12-01T23:22:11-08:00 Arun Kumar V Hello Mac,it would require a lot of mechanical alteration between a switch and a normal pot to achieve what is shown in the diagram. these kind of two-in-one pots are readily available in the electro stores, you can find this part in any old pocket transistor radio in which when you first turn the wheel, the radio gets on and slowly the volume also increases.Arun http://www.8051projects.net/forum-t10282.html 2008-12-01T23:22:11-08:00 Colin Mac Thanks Arun. Any chance you know a part number for something that would work? http://www.8051projects.net/forum-t10282.html 2008-12-01T23:22:11-08:00 ۞ TPS ۞ you can use 10k volume tone with on off switch commonly available in local elex marketit is used in portable black and white TV or pocket radio's volume controller pot with power switch or follow this picture http://www.8051projects.net/forum-t10282.html 2008-12-01T23:22:11-08:00 Arun Kumar V Thanks Arun. Any chance you know a part number for something that would work?probably he's asking for part number from "Digikey" or "Radioshack" catalogue http://www.8051projects.net/forum-t10282.html 2008-12-01T23:22:11-08:00 sashijoseph If radioshack's accessible,you can look up here for the part no... http://support.radioshack.com/support_electronics/doc21/21562.htmIt's this one .. VR001 10974780 POT W/SWITCH P7389Does the pot need to be turned down every time you switch on/off? Else you could use a normal spst for the switch.