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Only two identical, fixed-voltage power supplies, which have the provision to do so, may be connected in parallel. There is no way one could parallel two disparate supplies, one being rated 12-15V 32A …

The recommended power supply for Motorola 25-60W radios is the Motorola HPN4007D. It's a 13.8V DC 15 A Output Switched Mode Power Supply working off 110-220V AC input. Your 13.8V DC 30-50A Switched …

Normally the power consumption (W) or voltage (V) and current (A) would be furnished in the manual. The voltage would normally be furnished as 13.8Vdc or as ranging from 11-14V or 11-16V. In any case …

Peter Walker's and AnalogKid's solution to the question, Need a circuit to detect if something has gone from off-on or on-off, is also valid for this question. The timing diagram is nearly identical. …

Here's a relay-based solution.

This schematic may be easier to comprehend.

The Sonobond MH-2016 is a 1500 W Ultrasonic spot welder. What is the power being set on the power supply? It's the RF power limit for the job. Case 1: Set values RF power limit = 3000 W Energy = 150 …

An electromagnetic relay would be required. Here's the schematic. An 'engine running' contact, if available, would be the right replacement for 'ignition on'.

The transformer secondary voltage (12V - 0 - 12V) is too high and would require the regulator to dissipate close to 50W for only 15W output. Should the heat-sinking not be adequate, the regulator woul …

Here's a simplified version of the power supply circuit. It's a full-wave bridge rectifier circuit for an output voltage of + 2 V and another full-wave rectifier circuit, that uses the transformer ce …

A 555 astable could be used to control a DC motor in two ways as follows: Alternately run and stop the motor using a low astable frequency. Vary the motor speed through PWM control. For the first, a …

Two identical linear regulated power supplies may be paralleled, should there be a facility to do so. There are linear regulated power supply models which have the facility to interlink the regulated …

It's a 12 V DC motor which draws 0.07 A on no load, 0.3 A on full load and 1.8 A when stalled. A single phase, unfiltered DC supply using a 12 V 500 mA transformer and a 1 A bridge rectifier would be …

A modern, smart battery charger would be most unsuitable to run a car windshield wiper motor. However, a simple 12V battery charger of yore, with a charging current of 3.5A or higher, would do. Such c …

Here are some suggestions. All metal parts in the air purifier module are to be earthed. This includes the metal housing of the ionizer circuit board. In case of need to work on the ionizer circuit, …