Analogue Panel Meters

Panel Meters

These items were recently purchased at an Amateur Radio flea-market from a person in electronic manufacturing who has excess stock at a reasonable price. 

SD-640 Panel meter

SD-460 Panel meter

The seller also has more meters of the same brand and with other display ranges.

12 button Keypad

12 button Keypad

This item was purchased at an Amateur Radio flea-market from a person in electronic manufacturing who has excess stock at a reasonable price. No detail of the internal wiring was available however I have since opened a keypad, worked out the connection detail and provide the circuit detail below.

Keypad: 13 pin connection at bottom (left-to-right)

Circuit drawing:   n/c = no connection