Fuse monitor

Fuse monitor

When an appliance ceases to —K operate, there may be various causes for this, one of which is the blowing of the mains fuse. The monitor proposed here contains an LED that lights when that is the case. It is suitable for use with fuses rated from milliamperes to amperes. As long as the fuse[…]

Read more
PW_FrontView

Crowbar Protection

Quite a few electronic components. particularly active ones. cannot withstand too high voltages. Preventing costly circuits dying a premature death because the supply voltage has risen too high makes overvoltage protector no luxury. Such a protector must, of course, act swiftly, otherwise, the deed has been done before it had a chance to act. Therefore.[…]

Read more
Voltage Inverter

Voltage Inverter

A negative supply voltage may be obtained with the use of a special inverter IC. but such ICs are not always readily available. Fortunately. if the current drawn is not excessive, a standard HC-MOS chip may be used. The present circuit is based on Type 74HC14, which contains six Schmitt triggers, whose combined gates can[…]

Read more