The circuit we present uses only three components to indicate when the fuse of any appliance connected to the network burns. A neon light comes on, indicating this.
The R2 resistor serves to avoid a good fuse indication signal if the circuit is open, either by its own controls or by failure.
The neon lamp can be of any type without internal limiting resistance and must be installed in a visible location.
In figure 1 we have the device diagram which is based on a common fuse type miniature cartridge.
The circuit can also be used with other types of fuses and even circuit breakers. In Figure 2 we have the actual connections that must be made carefully. The resistors used are 1/8 W.
Material list:
R1- 220k ohm - resistor - red, red, yellow
R2 - 100 k ohm - resistor - brown, black, yellow
NE-1 - Common neon lamp
F1 - fuse of any type according to the appliance or protected installation.
Miscellaneous:
Wires, welding, etc.
