Over voltage protector
-
12V DARK SWITCH WITH 741 OP AMP Schematic Circuit Diagram
It works as a dark key with the LDR that you see in the diagram . The circuit consists of four resistors, one opamp, two potentiometers,…
Read More » -
Charge-a-Phone on NiMH Schematic Circuit Diagram
In numbers, there are probably more chargers around for NiMH than for Lithium-ion or Lithium-polymer batteries. If you wanted to…
Read More » -
Current tongs for PCB tracks
Current tongs are instruments for measuring alternating currents in cables. Their great advantage over most other methods is that the…
Read More » -
Stereo protector against d.c.
Stereo protector , If a d.c. coupled output amplifier breaks down during operation, the loudspeakers, particularly the bass units, are…
Read More » -
Power-on delay
The Power-on-Delay will delay the electrical connection for ~3-5 minutes until the power stabilizes. By doing so, your appliance is…
Read More » -
Overload Indicator
The overload indicator consists of a window comparator that measures the magnitude of an a.f signal. Two of the opamps…
Read More » -
Fuse monitor
The fuse monitor is a particular kind of protection relay that is employed when one signal controls multiple circuits or…
Read More » -
Protection against direct voltage
Protection against direct contact electric shock is based on normal common sense measures such as insulation of live parts, use…
Read More » -
REF200 from Burr-Brown
On a single monolithic chip, the REF200 combines three circuit building blocks: two 100-A current sources and a current mirror.…
Read More »