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Power supply filter with increased protection

The article proposes a simple surge protector that will significantly reduce the likelihood of damage to household radio equipment from high-voltage impulse noise in the network. 230 B / 50 GC. The proposed power filter, by the level of protection they provide, In most cases, will be much more effective, what filters, embedded… Continue Reading

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Two switches voltmeter

This article describes the two options simple and reliable turnouts voltmeters designed for operation in harsh environments. Not in all cases it is advisable to use modern digital meters. In some situations,, For example, in the garage, in the country, when you need greater protection against lightning… Continue Reading

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A residual current device users from the network 230 AT / 50 Hz

Sudden momentary power outage at the time of from fractions of seconds can cause damage to the electrical, electronic equipment, disrupt the operation of processes. To prevent spontaneous switching of electrical equipment after brief power outage, It can be made simple device. With the negative consequences of a short shutdown… Continue Reading

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flood alarm – power supply

The device is intended for acoustic signaling flooding of basements, filling the storage tanks of water for irrigation, etc.. It can also be used as an alarm buzzer in case of failure of domestic plumbing. Besides alarm functions the device can also be used as an AC power source… Continue Reading