This article lists the contents of the Roger Beep kit and contains notes and information for constructors.
|C3, C4, C5||1|
Table 1 is a list of parts that are supplied in the kit.
Fig 1 shows the RB circuit diagram.
|3||PTT in (from mic)|
|4||PTT out (to transmitter)|
Table 2 shows the usage of pins on JP1. Most constructors will wire directly to the PCB, but for those who wish to use a connector, a normal 6 pin polarised header plug, or 90° version of same can be installed on the board.
Note that PTTin is for connection of a PTT switch that provides a contact closure to ground to transmit. Check your connections carefully and DO NOT ATTEMPT TO USE IT IN ANY OTHER WAY.
Fig 2 is a view of the parts overlay. The cathode (ie the stripe) of D1 goes to the left.
Fig 3 is a view of the component side of a board using an optional 90° 6 pin polarised header. The chip was socketed in this case because this RB is used to test program code. Constructors could optionally install a socket to facilitate chip upgrade. R6 on this board has a 1k0 resistor installed, constructors would normally use a wire link, and R5 on this board is 4.7K to suit the transceiver.
Shielded wire should be used from JP1 pins 5 and 6 for the audio connection.
© Copyright: Owen Duffy 1995, 2017. All rights reserved. Disclaimer.