You do not have permission to edit this page, for the following reason:
The action you have requested is limited to users in the group: Users.
Free text:
== synopsis == If we want field reporting on the CCC camp, we quickly need a kit that provides us that service. Our first option was to use the available wifi, but since the link quality is unsure, we asked CoolePascal for a possible solution. He opted for the [http://en.wikipedia.org/wiki/PMR446 PMR 446MHz] with boosted power and bandwidth. Since we only have a couple of weeks left, and our video transceiver kits were unusable, we're taking the shortcut by connecting a reporter kit directly to a DECT handset. == implementation == === transmitter === * use a DECT handset * solder a 3.5mm 4p jack contra (TRRS) onto it, according to the Nokia standard: 1-Left, 2-Right, 3-Mic, 4-Common. Note that iPwn has the Gnd and Mic mixed up. === kit === * create an amplifier for reporter feedback, and connect the jack to the kit using a poor-man's mixer (i.e. resistors) The kit still needs some work (see todo), but it should work like this: * left socket is an unbalanced 6.3mm jack/XLR combo connector to connect a dynamic microphone to it * right socket is the 6.3mm headphone connector * (todo) potentiometer defines the feedback volume * switch powers the kit on/off (displayed by the led) * (todo) 3.5mm TRRS plug connects to the transceiver (DECT/GSM handset) == todo == * create a working connector, preferably 4p 3.5mm jack contra to a DECT handset Note that impedance and amplification and the like might not be optimal for connecting a dynamic microphone and headphones to the handset * connect the TRRS plug to the kit using resistors (TBD) * connect the potentiometer before the amplifier (check if it has impact on the transceiver signal) * acquire 9v batteries
Summary:
This is a minor edit Watch this page
Cancel
