Photo Timer Circuit
#photo timer
#timer circuit
#light sensor
#pulse generator
#timing circuit
#photodiode
#555 timer
#delay circuit
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555 Timer LED Flasher Circuit
All of the components in this list are generally available through RadioShack for less than $20. It is highly recommended to use a breadboard for assembly, as mistakes are common for first-time builders, and soldering can complicate troubleshooting. This tutorial...
TV remote control blocker/jammer circuit diagram
This small device can be aimed at a television to jam the remote control signal. The circuit design is straightforward. A 555 timer is configured as an astable multivibrator operating at a frequency of approximately 38 kHz, which is the...
transceiver-circuits
While developing an infrared (IR) extender circuit, a method was needed to measure the relative intensities of different infrared light sources. This circuit utilizes an SFH2030 photodiode as the infrared sensor. A CA3140 MOSFET operational amplifier is employed in differential...
555 Voltage Doubler Relay Driver
These novel relay driver circuits can activate a relay with a coil voltage rating that is double the Vcc. After activation, the relay armature is held in place.
The relay driver circuits described are designed for applications requiring the control of...
Light to Frequency Converter TSL220
A large area photodiode and current-to-frequency converter integrated into a clear plastic 8-pin DIL package. The output generates a pulse train whose frequency is directly proportional to the light intensity. It is CMOS compatible (a 3.3kΩ pulldown resistor is recommended...
variable voltage controller
The 555 oscillator operates with a +12V supply and ground, without the need for a -12V supply.
The 555 timer IC is a versatile component commonly used in various oscillator and timer applications. In this configuration, the circuit is powered by...
LED Flasher Circuit
The 555 timer chip is a versatile integrated circuit (IC) that, when connected correctly, can generate pulses of current at specific intervals determined by a resistor-capacitor (RC) network. In this mode, the LED does not remain constantly lit; it turns...
Sequential Led Flasher With Reversible Direction
A 555 timer controls a 74190 up/down counter. The 74190 drives a BCD decoder driver 7442. The 7476 is utilized to reverse the count at 0 and 9, resulting in an up-down-up-down counting sequence.
The circuit utilizes a 555 timer configured...
9V to 5V converter schematic with 555
A 555 timer can be used to generate a square wave to produce a negative voltage relative to the negative battery terminal. When the timer output at pin 3 goes positive, the series 22 uF capacitor charges through the diode...