Price - Stock No 70

This probe tests more than a circuit tester.

With the crock clip connected to the 0V of the system to be tested:

When testing a system less than 9V:
Probe isolated Green on, Red on
Probe earth Green off, Red on

When testing systems over 9V (called +ve)
Probe isolated Green on, Red on
Probe earth Green off, Red on
Probe +ve Green on, Red off

Schematic Diagram

PCB Layout

Construction Method

1. Check your P.C.Board carefully for damage to the tracks. 

2. Identify the resistors by their colour bands or with a multimeter.  Bend the legs with long-nose pliers to match their holes and push them into place against the surface of the board. Solder in place - refer Soldering Technique .

3. The LEDs are also polarised. See diodes. The short leg is the 'K' leg.  Solder in place. 

4. Solder the pins in the holes for the battery connections, crock clip and probe.  

5.  Attach the wire to the crock clip, the other end to the pin.  See Tinning Wire .

6. Soler the battery snap.  red +       black -

Trouble Shooting

Troubleshooting will involve careful checking of locations and polarity of all components.  Re-solder all joints and check to make  sure  you  have  not  bridged across  between  any  two adjacent component legs.  The end  of  a  broken  hacksaw  blade  sharpened  on  an  emery wheel is a good tool for cleaning between soldered joints.

Contact CdS electronics

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