Voltage ramps are when a voltage changes steadily (linearly) over time. This can be obtained with a capacitor getting or giving a steady amount of current.
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I like LM334s like these for setting a small current (10mA or less). As an Amazon Associate I earn from qualifying purchases.
Nice looking larger value capacitor kit.
- Voltage of a capacitor rises steadily over time (linear) when charged with a constant current and the voltage of a capacitor falls steadily when discharged at a steady current.
- Capacitor being charged or discharged with a steady (constant) current.
- 1 amp will charge/discharge a 1 farad capacitor 1 volt each second. – 0.001A (1mA) will charge/discharge a 0.001F (1,000µF) capacitor 1 volt each second.
A constant 1mA of current charging a 1,000µF capacitor (which is a 1 millifarad capacitor), will gain a volt of charge every second.
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- Electronic component appearance and schematics – Commonly used through hole versions
- Electronic circuit basics
- Voltage sources for electronics basics
- Multimeter measuring voltage
- Resistor component – Learning electronics resistors
- Light Emitting Diodes – Indicator LEDs
- LED circuit -Lighting a Light Emitting Diode
- Resistor limiting current – Ohms law
- Multimeter measuring current
- Wattage – Electrical Power unit
- Resistors connected in parallel
- Series resistors
- Voltage divider – Setting a fractional voltage
- Resistor color code
- Diode – Rectifier
- Trimpot – Trimmer potentiometer – Voltage divider – Variable resistor
- Capacitor component
- Capacitor RC time constant
- Voltage ramp Demonstrated using a capacitor.
- LM334 three terminal adjustable current source not a common component. I use for an easy current source in many circuits.
- Switch NOT logic gate – digital signal inverter
- Switch OR gate – LED circuit
- Switch AND gate – LED circuit
- Switch based NAND logic gate – LED demonstration circuit
555 timer is an integrated circuit (IC). Being an IC, it has complex circuitry combined in a single package with external pins/terminals to connect to other circuitry. You can easily make all kinds of fun circuits with just a 555 timer and the components covered above, so I think it’s a good component to learn next.
- 555 Timer IC This particulars of this integrated circuit covered on this page make a lot more sense after you study the basic circuits that follow.
- 555 timer bistable mode – Flip flip basic circuit
- 555 timer monostable mode – One shot
- 555 timer astable multivibrator mode – Flashing LEDs
- 555 timer schmitt trigger logic inverter – NOT gate
- 555 timer LDR controlled astable multivibrator mode LED flasher circuit
- 555 timer – Buzzer output – Astable multivibrator mode – Light dependent resistor LDR controlled circuit
Transistors will probably be the most challenging components to learn. Understanding them will help you understand all of electronics much better, and help you the most in being creative while designing your own circuits.
- NPN BJT switch circuit – Bipolar Junction Transistor – 2N3904
- PNP BJT switch – Bipolar Junction Transistor – 2N3906
- NPN BJT emitter follower circuit – transferring a voltage minus a diode drop
- PNP BJT emitter follower circuit – Transferring weak signal voltage with a diode voltage shift
- Bipolar Junction Transistor BJT voltage follower circuit improved to eliminate base emitter diode shift
- NPN BJT current source – Bipolar Junction Transistor – 2N3904
- PNP BJT current source – Bipolar Junction Transistor – 2N3906
- Schmitt trigger – NPN BJT
- Zener diode component – voltage reference – regulator
- Voltage doubler circuit fragment- Capacitor charge pump – Some V loss
- 7805 5V positive voltage regulator IC
- Battery voltage state of charge SOC – From fully charged to discharged
These pages are still being compiled.
Short videos with diagrams pages of circuits using capacitors. Bistable and Schmitt trigger 555 don’t use a capacitor, but they help introduce the 555 component.
- Brief charging capacitor voltage ramp circuit using LM334 current source
- Brief discharging capacitor voltage ramp using LM334 current source
- Brief capacitor charging RC time constant demonstration circuit
- Brief capacitor discharge RC time constant circuit
- Brief 555 bistable mode flip flop alternating LEDs circuit
- Brief 555 timer monostable one shot mode circuit
- Brief 555 timer astable multivibrator mode circuit
- Brief 555 Schmitt trigger logic inverter