outdoor lighting controller
#outdoor lighting
#controller
#automation
#light sensor
#timer
#energy efficiency
#LED
#dusk to dawn
#photocell
#relay
No description available.
Slide-show-timer
The interval can be set between approximately 5 to 30 seconds. A relay controls the slide-change mechanism. Operational amplifier U1 functions as a type of Schmitt trigger. Resistors R1 and R2 bias the non-inverting input at pin 3 of U1...
Led circuits
The circuit below illustrates powering one or two LEDs from the 120-volt AC line using a capacitor to drop the voltage and a small resistor to limit the inrush current. Since the capacitor must pass current in both directions, a...
Propeller Clock Mechanically Scanned LED Clock
A motor spins the "propeller", and a small microprocessor keeps track of time and changes the pattern on seven LEDs with exact timing to simulate a 7 by 30 array of LEDs. It is an illusion, but it works nicely.
The...
Timer with alarm
The circuit features two timing ranges: from 10 seconds to 5 minutes and from 1 minute to 80 minutes. It is powered by a 9-V battery. An LED is connected in a manner that allows for a consistent flashing frequency...
one transistor led flasher
This is a one-transistor LED flasher circuit designed to flash a super bright LED. The circuit employs a single transistor as a driver, which receives the flash rate from LED 2, a self-flashing LED. The flash rate can be adjusted...
A Light Operated Repeating Timer Circuit
This circuit closely resembles Repeating Timer No. 2. However, the inclusion of a light-dependent resistor (LDR) allows the timer's operation to be confined to daylight hours. Resistor R7 enables the adjustment of the light level at which the timer will...
Led bar-graph driver
The circuit utilizes CA3290 BiMOS dual voltage comparators. The non-inverting inputs of A1 and A2 are connected to a voltage divider reference. The input signal is applied to the inverting inputs. LEDs are activated when the input voltage reaches the...
Relay pull-in timer circuit in time process
The circuit features a two-stage structure with a timing range of approximately 0.5 to 12 seconds, while in a specified configuration, the timing range extends from 1 to 160 seconds. The transformer parameters include an iron core made of M42/15.7...
The power indicator circuit
The ACER PM02 MP4 machine features a voltage status indicator circuit. When power is supplied, a red LED illuminates, indicating that the device is powered on. Upon entering operational mode, a green LED lights up.
The voltage status indicator circuit serves...