The following circuit schematic diagram is taken via reuk.co.uk. The circuit is used to power the CCTV camera and provides lighting inside the nestbox, and charge batteries from a PV solar panel. Here is the schematic diagram : D1 is a Schottky Diode employed to forbid battery charge breaking away through the solar panel at [...]
The following relay circuit will detect the presence of sound to activate the relay. This sound-controlled relay can be used as voice operated switch, light control, toys, or any application controlled by a switch. Replace the switch with this circuit, then you have a sound-controlled device. 741 op-amp is used to amplify the signal. The [...]
The logic power control of analog regulator is quite useful in applications where a digital circuit need to control the power source. For example, the EEPROM programmer or other power controls. The following circuit provides on-off control for 78xx regulator using digital (CMOS or TTL) signal level. The transistor is put in series with the [...]
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