transistors Random-delay gen
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A Tan TimerCircuit
Six timing positions suited to different skin types; timing affected by sunlight intensity. This timer was designed for individuals seeking to achieve a tan.
The electronic timer circuit described is intended for use in tanning applications, specifically designed to cater to...
Touch-on-off-electronic-switch
Transistors Q1 and Q2 control latches Q3 and Q4 to switch on the lamp. A high resistance from touching the electrode biases Q1 or Q2 on, setting or resetting the latch.
In this circuit, transistors Q1 and Q2 function as input...
Two-Transistor Sine-Wave Oscillator
This oscillator employs two transistors and operates the crystal in its fundamental mode. Capacitors CT and C2 should be approximately 2,700 pF for 1 MHz, 680 pF for 5 MHz, and 330 pF for 10 MHz. A capacitance of 150...
Example Transistor Circuit with LEDs
A transistor is an electronic component that allows a small current to control a significantly larger current. This characteristic is valuable in various renewable energy projects and other applications. A basic circuit diagram is provided, featuring a 12V LED spotlight...
Reverse Bias Oscillators
Several NPN transistors can oscillate within the audio frequency range when reverse biased. The minimum supply voltage required is 7V for low-power transistors like the BC109, BC238, and 2N2222A; it increases to 12V for medium-power transistors such as the BD139,...
Transistor Mosfet pairs to drive LED cube layers
None of those devices is very suitable. The drivers aren't specified to operate with 3.3V gate signals, and although the typical graph shows that a...
The devices referenced in the original input are not appropriate for the intended application due to...
Timer circuit with 106 fixed preset time
The foot 13 between valve value 1 and valve value 2 will draw the transistor base current. If the relay releases, after a recovery time of 0.5 seconds, pressing the key will initiate the switching process again. The timer is...
rising pitch siren
A two-transistor electronic siren breadboard circuit that produces an audible rising pitch on a loudspeaker. This circuit serves as a tutorial for beginners in electronics.
The two-transistor siren circuit operates by utilizing the properties of transistors to create an oscillating signal...
Jogging Timer
This circuit was developed since a number of visitors of this website requested a timer capable of emitting a beep after one, two, three minutes and so on, for jogging purposes. As shown in the Circuit diagram, SW1 is a...