download free wiring diagram

sing this electronic scheme can be made an electronic circuit that allows a sound indication for a button.The circuit is based on a 7555 integrated timer (CMOS version of the well-known ment 555) is connected as a multivibrator astabil .His output is a rectangular pulse with a frequency of 700 Hz, which is used to control a small buzzer.


Pressed Button Sound Indicator Schematic 

Pneumatic Valve Types

Pneumatic valves have many types and functions. pneumatic valves .The role as a regulator / controller in the pneumatic system. Components such control or so-called valves (Valves). Pneumatic Valve types can be grouped according to the construction design as follows:

a. Poppet valves (Poppet Valve Pneumatic)

■ Disc Valves (Pneumatic Valve Seat Disc)

b. Slide valve (slide valve Pneumatic)

■ Longitudinal Slide

■ Slide Plate

Meanwhile, according to its function valves are grouped as follows:

a) Valves Steering (Directional Control Valves)

b) One-way Valve (Non Return Valves)

c) Regulatory Pressure Valve (Pressure Control Valves)

d) Flow Control Valves (Flow Control Valves)

e) open-close valve (Shut-off valves)

While the arrangement order in the pneumatic system can be described as follows:

■ The input signal or input element gets energy directly from

power source (air felts) are then transmitted to the processor

signal.

■ The signal processor or processing element signal processing

logic inputs are to be forwarded to the fi nal control element.

■ end of the control signal (final control element) that will drive the direction of movement of the actuator output (working element) and this is the end result of the pneumatic system.

- Pneumatic-Valve Types

This is design circuit for DC coupled current monitor that is eliminates the previous circuit’s trim but pulls more current from the APD bias supply. A1 floats powered by the APD bias rail. This is the figure of the circuit.

The 15V zener diode and current source Q2 ensure A1 never is exposed to destructive voltages. The 1kW current shunt’s voltage drop sets A1’s positive input potential. A1 balances its inputs by feedback controlling its negative input via Q1. As such, Q1’s source voltage equals A1’s positive input voltage and its drain current sets the voltage across its source resistor. Q1’s drain current produces a voltage drop across the ground referred 1k resistor identical to the drop across the 1kW current shunt and, hence, APD current. This relationship holds across the 20V to 90V APD bias voltage range. The 5.6V zener assures A1’s inputs are always within their common mode operating range and the 10M resistor maintains adequate zener current when APD current is at very low levels.

Two output options are shown. A2, a chopper stabilized amplifier, provides an analog output. Its output is able to swing to (and below) zero because its V– pin is supplied with a negative voltage. This potential is generated by using A2’s internal clock to activate a charge pump which, in turn, biases A2’s V– pin. A second output option substitutes an A-to-D converter, providing a serial format digital output. No V– supply is required, as the LTC2400 A-to-D will convert inputs to (and slightly below) zero volts. [Schematic’s circuit source: Linear Technology Notes].