simple crystal tester circuit

This is a simple servo tester which will comprehensively test the capabilities of almost any modern servo. It has two pushbuttons, CENTRE and SWEEP and a potentiometer which works as follows: CENTRE Does exactly that, centers the servo, afterwards...

The charger operates with a charging voltage of 2.4 V per cell, aligning with the recommendations of most manufacturers. The circuit delivers a charging voltage of 14.4 V (6 cells at 2.4 V per cell) in a pulsed manner...

The agriculture and electrical power harrow plow power cord must consist of four rubber cables, with one core wire designated as the ground wire. The traction machine housing must be properly grounded. The two traction power machines are connected...

A, B, and two electric motors allow simultaneous operation through interlock control. The two motors can be connected in series with each other using normally closed contacts in the respective coil circuit. The circuit design facilitates the interlocking operation of...

The 2.25-MHz oscillator Q1 drives amplifier Q2 and XTAL1, an ultrasonic transducer. The transducer is a lead zirconate-titanate type. Taps on T1 and T2 provide low-impedance drive points. The circuit consists of a 2.25-MHz oscillator (Q1) that serves as the...

This is a low-input impedance conversion circuit with the reference resistor RS connected to the amplifier's feedback loop, resulting in an input impedance close to zero. The input current flows into the output end of the operational amplifier (Op-Amp)...