Circuits & Schematics Maxim

1. One-wire bus powers water-level sensor
   Dale Litwhiler
   Circuits Measurement Maxim DS2423
   You can use the simple sensor circuit in Figure 1 to remotely monitor the level of liquid water in a vessel such as a swimming pool. The LMC555 sensor oscillator provides an output-signal frequency that is a function of the water level. This signal ...
   Sep 2, 2024
2. Pulse-width modulator features versatile operating parameters
   Ken Yang
   Circuits Beginners Supply Maxim MAX4094
   Included among the many applications for pulse-width modulation (PWM) are voltage regulation, power-level control, and fan-speed control. A PWM circuit for such systems can be implemented with three op amps on a single quad-op-amp chip (Fig. 1). ...
   Aug 1, 2024

3. High-power LED drivers require no external switches
   Alfredo Saab Steve Logan
   Circuits Supply Light Maxim MAX1685 MAX4162 MAX5035
   As the latest generation of new LEDs achieves higher levels of power and efficiency, use of these devices extends to new areas, such as flashlights and vehicular applications. High-power LEDs are finding use even in ambient lighting, long the sole ...
   Mar 20, 2024
4. Analog switch lowers relay power consumption
   Steve Caldwell
   Circuits Analogue Design Supply Maxim MAX4624
   Designers often use relays as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the control input. However, the power dissipation in a relay coil may render the device unattractive in ...
   Feb 2, 2023
5. Dual comparators stabilize proximity detector
   Arthur Harrison Joseph Stern
   Circuits Measurement Maxim MAX406ACPA MAX912
   In the proximity detector of Figure 1, a 4-in.-sq piece of copper-plated pc board serves as an antenna that forms one plate of a capacitor. An approaching (grounded) person serves as the other plate, producing a capacitance value of 2 to 5 pF that ...
   Dec 29, 2022
6. Boost Converter Generates Three Analog Rails
   Tim Herklots
   Circuits Supply Maxim MAX858
   The standard boost converter in Figure 1 uses not only IC 1 , C 1 , L 1 , D 1 , and C 2 to generate a main 5 V output, but also additional small, low-cost components to provide two auxiliary supply rails of 10 and 5 V. These auxiliary outputs are ...
   Dec 21, 2022
7. Deep discharge protector for 3.6 V Li-Ion battery
   Rajkumar Sharma
   Circuits Supply Maxim MAX882
   A rechargeable battery’s load should be disconnected at the point of complete discharge, to avoid a further (deep) discharge that can shorten its life or destroy it. Because a battery’s terminal voltage recovers when you disconnect the ...
   Dec 16, 2022
8. Electronic circuit replaces mechanical push-push switch
   Donald Schelle
   Circuits Digital Maxim MAX6369 MAX6847
   Mechanical push-pushbutton switches (also known as alternate-action or push-on/push-off switches) can be bulky and expensive. As an alternative, an electronic version uses a cheaper, NO (normally open), momentary-on switch (Figure 1). Figure 1. ...
   Dec 13, 2022
9. Low-Dropout Linear Regulators Deliver Constant Currents
   Brad Thompson
   Circuits Supply Maxim MAX1735 MAX1818
   Linear voltage regulators offer a simple method of producing a constant current by connecting a fixed resistor between the regulator's output and ground nodes. The regulator's constant output voltage produces a constant current through the ...
   Dec 5, 2022
10. High-speed peak detector uses ECL comparator
    Lukasz Sliwczynski Przemyslaw Krehlik
    Circuits Analogue Design Measurement Signal Processing, Filters Maxim MAX9690
    Professional electronics designers often use peak-detector circuit sin such applications as amplitude measurement, automatic gain control, and data regeneration. You can build a simple and fast peak detector from a serial diode and a shunt ...
    Nov 9, 2022

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