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Resistance and capacitance of several phase shifting trigger circuit – Circuit Schematic
Resistance and capacitance of several phase shifting trigger circuit
The introduction for unidirectional thyristor trigger circuit is equally applicable to the TRIAC. Here are some also for bidirectional circuit shown in Figure 1...
555 multi-purpose repair circuit diagram – Circuit Schematic
555 multi-purpose repair circuit diagram
The overhaul has the following features: online judge diodes, transistors is good or bad; test TTL logic level or a high impedance state; can output 37MHz, bar ...
555 tri-state acousto-optical logic circuit – Circuit Schematic
555 tri-state acousto-optical logic circuit
As illustrated, 555 and R4, R5, C1 and so connected as a controllable multivibrator mode, which force reset terminal 4 feet to explore pen, control terminal 5-p...
555 monostable trigger timing circuit – Circuit Schematic
555 monostable trigger timing circuit
Introduction to circuit schematic of the circuit shown in Figure 3-3. Here the 555 connected as a one-shot form, usually in a normally open push button switch...
Using several resistive and capacitive phase shifting trigger circuit – Circuit Schematic
Using several resistive and capacitive phase shifting trigger circuit
The introduction for unidirectional thyristor trigger circuit is equally applicable to the TRIAC. Here are some also ...
Electronic pulse circuitry fishing – Circuit Schematic
Electronic pulse circuitry fishing
Circuit works: SC3525A for the US General Semiconductor PWM silicon chip, 1 foot of the error amplifier inverting input terminal,...
Electronic pulse circuitry fishing – Circuit Schematic
Electronic pulse circuitry fishing
Circuit works: SC3525A for the US General Semiconductor PWM silicon chip, 1 foot of the error amplifier inverting input terminal,...
Pulsed Magnetic Field Therapy (PMFT) Circuit – Circuit Schematic
Pulsed Magnetic Field Therapy (PMFT) Circuit
Here is a simple circuit based on 555 IC that generates a pulsed magnetic field. You may use this field for pulsed magnetic field therapy. Human body is influen...
Multiple Capacitor Charger – Circuit Schematic
Multiple Capacitor Charger
The circuit is shown in Figs. 1-2 and tested succesfully. This is a 555 timer IC based charger. The circuit is operated by 8.4VDC. For R1=2.7K, R2=3.3K, and C1=...
Siren circuit with 556 timer – Circuit Schematic
Siren circuit with 556 timer
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Electronic Roulette wheel with 20 LEDs and with 36 LEDs – Circuit Schematic
Electronic Roulette wheel with 20 LEDs and with 36 LEDs
In this electronic roulette wheel (see Fig. 1. ) the timer 555 works as a generator of pulses with fading frequency. The counter 4017 switches LED`s one by one ...
Voltage Controlled Frequency Divider with Variable Division Ratio – Circuit Schematic
Voltage Controlled Frequency Divider with Variable Division Ratio
This voltage controlled frequency divider circuit (see figure in text) produces pulses of lower frequency that depends on the control voltage, and front edges o...
PULSE DELAY – Circuit Schematic
PULSE DELAY
When a GATE signal (between 3V and 15V), the capacitor C5 acts as a differenciator and converts the gate signal into a brief positive pulse (width 10 ms). D1 pr...
Monostable Multivibrator – Circuit Schematic
Monostable Multivibrator
The schematic for a monostable multivibrator is shown below. Like the astable multivibrator, one transistor conducts and the other cuts off when the circuit is ...
One second Audible Clock Circuit Schematic – Circuit Schematic
One second Audible Clock Circuit Schematic
This accurate one-pulse-per-second clock is made with a few common parts and driven from a 50 or 60 Hertz mains supply but with no direct connection to it. A be...
Amplifier Timer Circuit Schematic – Circuit Schematic
Amplifier Timer Circuit Schematic
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pushing P1 the device ...
Grand Prix Starting Lights – Circuit Schematic
Grand Prix Starting Lights
This circuit reproduces the starting light sequence currently used by FISA for Formula One racing. It could be used with slot car sets (such as HO scale AFX/Lif...
Pulse Frequency Modulator – Circuit Schematic
Pulse Frequency Modulator
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Morse Keyer Redesign and Rebuild – Circuit Schematic
Morse Keyer Redesign and Rebuild
Two cheap CMOS ICs and a few transistors was all that was required to rebuild my elderly TTL automatic morse keyer into a low current lightweight battery powere...
How To Build A Sequential Timer Using A Cmos 4017 – Circuit Schematic
How To Build A Sequential Timer Using A Cmos 4017
This circuit uses a Cmos 4017 decade counter to create a sequence of four separate events. The number of events in the sequence may be increased to nine or ten....