This is a low cost, simple, yet a surprisingly powerful electronic siren powered by just a 9V battery. The circuit may provide the final circuit block module in an alarm circuit using a relay to activate it.
Unipolar Stepper Motor Driver Kit — CK1405 Unipolar Stepper Motor Driver Kit. Standard circuit to driver unipolar stepper motors with 5, 6 or 8 wires. Uses 4 IRFZ44’s. Can be operated in free-standing or PC-controlled mode. Uses standard IC’s: 4013, 4030 and 4093.
This bipolar stepper motor driver circuit will drive a bipolar stepper motor using externally supplied 5V levels for stepping and direction. These usually come from software running in a computer or from a microcontroller unit. The circuit uses IRFZ44 and MTP2955 MOSFET’s.
Bi-Polar Stepper Motor Driver Kit — CK1406 This bi-polar stepper motor driver kit will drive a bi-polar stepper motor using externally supplied 5 volt levels for stepping and direction (Usually provided by PC Software. Uses IRFZ44 and MTP2955 MOSFET’s.
The AM-780K is a tuned radio frequency (TRF) receiver of the standard AM (amplitude modulation) broadcast frequencies (550kHz – 1600kHz). Easytobuild, using only two integral circuits (IC). Assembly of your AM-780K AM Radio Kit will prove to be an exciting project and give you much satisfaction and personal achievement. Care must be given to identifying… Read More »
NE5532, NE5532A, SA5532, and SA5532A The NE5532, NE5532A, SA5532, and SA5532A devices are high-performance operational amplifiers combining excellent DC and AC characteristics. They feature very low noise, high output-drive capability, high unity-gain and maximum-output-swing bandwidths, low distortion, high slew rate, input-protection diodes, and output short-circuit protection. These operational amplifiers are compensated internally for unity-gain operation.… Read More »
The LM833 is a dual general purpose operational amplifier designed with particular emphasis on performance in audio systems. This dual amplifier IC utilizes new circuit and processing techniques to deliver low noise, high speed and wide bandwidth without increasing external components or decreasing stability. The LM833 is internally compensated for all closed loop gains and… Read More »
The following is an electronic circuit called galaxy audio booster which serves to improve the performance of your audio system. This circuit uses an IC RC4558 in which there are two op-amp modules that can be used for stereo audio applications. The circuit is similar to stereo tone booster that uses the principle of High… Read More »
This sine wave to square wave converter circuit is expected to provide good square waves changing a sine wave delivered from an existing generator. Its primary feature consists in the fact that no power-source is required: in this manner it can be simply connected between a sine wave generator and the device under test. The… Read More »