long range video transmitter circuit #circuitlove #toolsTutorial

AUTOMATIC GARDEN LIGHT

 AUTOMATIC GARDEN LIGHT This circuit automatically turns on and illuminates the LEDs when the solar panel does not detect any light. It switches off when the solar panel produces more than 1v and charges the battery when the panel produces more than 1.5v + 0.6v = 2.1v

PHONE TRANSMITTER - 3

PHONE TRANSMITTER - 3 see also Phone Bug (101-200 circuits)   This circuit has poor features but you can try it and see how it performs. It   uses a PNP transistor and requires a separate antenna. It also has a supply of   less than 1.9v, via the red LED. It would be better to put 2 LEDs in series to   get a higher voltage. It is activated when the phone is picked up.
 

new 200w amplifier circuit #srelectroniclover #ac250vcircuittutorial #ci...