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With a PWM controller, this board allows very fine adjustment of the energy supplied (and thus the speed of rotation of the axis) to an...
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In our last issue we promised you a description of a micro-UHF, companion of the micro-transmitter controlled by voice. It is this micro-r... -
Figure 1: Diagram of quartz tester whose core is less than 1 MHz. You need to use this tester, a digital frequency meter (ELM has pub...
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Capable of measuring ambient temperature of -50 ° to +150 ° C, it is not only suitable for home or office, but also for air-conditioned ro... -
Figure 1: Diagram of the circuit without power transformer and component list. Here's a good time that I manage to get the low vo...
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This device is a generator based on the voice audio chip from Holtek HT8950, when talking into the microphone, the voice from the loudspeake...
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Inserted into a set of closed circuit television (CCTV), or simply connected to a mini-CCD camera, this device allows to inexpensively det... -
Figure 1: Diagram of the circuit flash LED and components list. I had a high brightness LEDs, such as the one you use in assembling EN...
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This micro-transmitter UHF feasible in version 10 or 400 mW, can transmit the sounds it picks up within several hundred meters. Powered by 2... -
This description provides a powerful micro-receiver, adapted to listen for transmissions on 433.75 MHz at a distance. It allows the activati...