Circuits & Schematics: -Wire Barometer 5/10 Volt Design vrs - 6

51. Long Range FM Transmitter
    Circuits Radio
    .. case. Shield the oscillator stage using an aluminum sheet. Coil winding details are given below: L1 - 4 turns of 20 SWG wire close wound over 8mm diameter plastic former. L2 - 2 turns of 24 SWG wire near top end of L1. (Note: No core ...
    .. is used as power control. For hum-free operation, operate the transmitter on a 12V rechargeable battery pack of 10 x 1.2-volt Ni-Cd cells. Transistor T2 must be mounted on a heat sink. Do not switch on the transmitter without a matching ...
    Oct 7, 2010

52. AC Power Current detector Circuit with LM1458
    Circuits Measurement Power
    .. current through an inductive pickup (L1) as a screen diameter of 1 inch U-bolt wound with 800 turns # 30 # 35 magnet wire. The pickup could be made from rings of iron or other type of processor core that allows enough space to pass one ...
    .. output in just a couple of times the ground so a voltage divider (1K/470) is used to reduce the voltage signal at about 0,7 volt. An additional diode added in series with transistor base to ensure that off when the voltage op-amp is 2 volts. ...
    Dec 5, 2010
53. Black Light
    Circuits Supply Light Power
    .. R1 470 Ohm Resistor R2 270 Ohm Resistor T1 Medium Yellow Inverter Transformer MISC IC Socket, Heat Sink For Q1, Screw, Nut, Wire and PC Board Notes: P1 changes brightness of the black light tube. elecircuit.com
    .. circuit is a simple ultraviolate light that can be powered by a 6 volt battery or power supply that is capable of supplying 1 or more amps. Circuit diagram Parts C1 0.0047uf Mono ...
    Dec 27, 2010
54. Isolated-FET Pulse Driver Reduces Size, Power Consumption
    Jaime Castelló José María Espí Rafael García-Gil
    Circuits Power APT APT40GF120JRD
    .. 20-turn primary winding and a 12-turn secondary winding, both fabricated from 0.2-mm-diameter, 0.008-in, AWG #32 magnet wire. When transistor Q 1 switches on, it induces a positive voltage in T 1 ’s secondary winding that switches ...
    .. resets through R 3 and D 3 . The voltage at T 1 ’s secondary winding goes slightly negative to balance the core's volt-second characteristic, which forward-biases Q 3 ’s body diode without current, and Q 4 ’s body diode ...
    Mar 30, 2022
55. Wireless Power Demo Circuit
    Circuits Power
    .. have been asking me for the circuit of the demonstration TX I used in the video, so here it is: This is *not* an efficient design and is meant as a demonstration only. The compression trimmer should be fairly high quality, but as the demo ...
    Nov 11, 2011
56. A diode ladder multiplies voltage under software control
    William Grill
    Circuits Supply Microcontrollers Usage Power
    .. eight-pin micro multiplies, monitors, and delivers a boosted voltage to a load The circuit in this Design Idea uses a Microchip PIC12F510 controller to drive a voltage multiplier ladder and a single pin to output ...
    Mar 30, 2012
57. Induction Receiver
    Circuits Wireless Texas Instruments TL431
    .. (as in a relay or transformer) unless you can remove the iron. The resulting coil should be a simple solenoid like wire wrapped around a nail. Don't try to wind your own it takes too many turns. Evaluate several coils simply by ...
    .. coil if available or a suitable coil from some other device. The coil in the prototype was salvaged from a surplus 24 volt relay. Actually, two relays were needed since the first was destroyed in the attempt to remove the surrounding ...
    May 9, 2017
58. DIY Low Frequency Generator - Op-Amp Tester
    Валерий Бабанин
    Circuits Oscillators Measurement Amplifiers GL5506
    .. A homemade optocoupler (Figure 4) with a GL5506 photoresistor (peak spectral sensitivity is 540 nm) and a green SMD LED (510-555 nm) of 3014 footprint (3.0 mm × 1.4 mm) is used. Such a pair effectively performs its function at 100 ...
    .. Yellow and white LEDs have been successfully tested. Don't forget to shade the optocoupler in bright light. Figure 4. Design of a homemade optocoupler. The filter capacitor C3 can be omitted when working with frequencies above 1 kHz; ...
    Nov 20, 2024
59. A nice, simple, and reasonably accurate PWM-driven 16-bit DAC
    Christopher Paul
    Circuits Measurement Microcontrollers Usage Texas Instruments OPA383 REF35 SN74AC04 TS5A22362
    .. Replacing the R A 0.1% part with a 0.05% part Replacing the 30.1 kΩ R B2 with a 28.7 kΩ 1% resistor in series with a 5% 510-Ω unit. Driver power supply Alas, once again, we must abandon the goal of keeping the errors introduced to less ...
    .. maximum over the temperature range. The bias current is 76 pA maximum from 40 C to +85 C. I’d like to keep the design’s various independent error contributions under ½ PWM count (in this case, under 2 -17 of ...
    Aug 11, 2025
60. Simple RC Cars - Single channel Transmitters and Super Regenerative Receivers at 27 MHz and 49 MHz
    Circuits RC Modeling
    .. is the 9 volt GS transmitter which does not use a crystal. This clever design allows only two transistors to generate both the ...
    Mar 8, 2005

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