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Schematics of delabs: Simple Digital Event Counter

http://schematics.dapj.com/2004/10/simple-digital-counter.html

Electronic Circuit Diagrams and Design Ideas. Tuesday, April 07, 2015. Simple Digital Event Counter. The basic digital circuits are Flip Flop and Counter, both are here. This circuit can be cascaded to make even a 6 digit event counter, even a simple frequency counter can be made. These are best done with microcontrollers today. Then what if you have to design your own microcontroller on a FPGA, so the basics have to be sound, hence you have to know what gates, flip flops and counters are. Simple High sp...

schematics.dapj.com

Schematics of delabs: Opamp Supply on Buffered Virtual Ground

http://schematics.dapj.com/2009/02/opamp-supply-on-buffered-virtual-ground.html

Electronic Circuit Diagrams and Design Ideas. Thursday, February 19, 2009. Opamp Supply on Buffered Virtual Ground. When a Inverting Opamp Configuration is at a steady state, we say the Inverting Input is at a Virtual Ground. That means it is at 0V w.r.t to the dual power supply ground, but it cannot drive or draw any current. It is at a high impedance, but still at 0V. When you buffer this 0 V, you get a low signal ground for a opamp supply. Simple Sample and Hold. Sample and Hold Standby. Millivolt Sou...

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Schematics of delabs: Monostable Multivibrator CD4538

http://schematics.dapj.com/2004/11/monostable-multivibrator.html

Electronic Circuit Diagrams and Design Ideas. Tuesday, July 07, 2015. CD4538 is a dual Monostable Multivibrator. When you trigger the chip the output sends off one single pulse or one high-low event. Mixed Circuits Analog with Digital. The Output pin 7 is the complementary state of pin 6, it is the reverse state or inverted form of pin 6 output. Two Stage Sequential Timer. Simple Sample and Hold. Sample and Hold Standby. Opamp Supply Virtual Ground. Normally Closed AC SSR. Edison Bulb Life Extend. PC RS2...

schematics.dapj.com

Schematics of delabs: Simple Sample and Hold with CD4066

http://schematics.dapj.com/2005/01/simple-sample-and-hold.html

Electronic Circuit Diagrams and Design Ideas. Wednesday, January 20, 2016. Simple Sample and Hold with CD4066. A sample and hold is like an analog memory. If The digital control A is low 4066 switch is open, and when A is high switch is closed. U2B is a buffer so as to ensure quick charging of C1 thru 4066 on resistance of 100E. Mixed and Interface Circuits. Simple Sample and Hold. Sample and Hold Standby. Opamp Supply Virtual Ground. Normally Closed AC SSR. Edison Bulb Life Extend. OR gate with two 555.

schematics.dapj.com

Schematics of delabs: Triac based Lamp Dimmer power control

http://schematics.dapj.com/2004/10/dimmer-or-power-control.html

Electronic Circuit Diagrams and Design Ideas. Monday, September 08, 2014. Triac based Lamp Dimmer power control. This is a phase angle control of a Triac which is a evolution from an SCR. The 50 Hz or 60 Hz Sine wave of mains can be turned on at any point after the Zero Crossing. Are now used for PWM drive stages. The Source file in CadSoft EAGLE format is here del00004.zip. Simple Sample and Hold. Sample and Hold Standby. Opamp Supply Virtual Ground. Normally Closed AC SSR. Edison Bulb Life Extend.

schematics.dapj.com

Schematics of delabs: Mains Voltage Indicator with a LED

http://schematics.dapj.com/2004/11/mains-voltage-indicator-with-led.html

Electronic Circuit Diagrams and Design Ideas. Thursday, July 09, 2015. Mains Voltage Indicator with a LED. This is a mains 230V AC voltage indicator and is a LIVE CIRCUIT, so take care. The Resistor has to be a fusible ceramic wire wound and the capacitor 630V AC or higher capacity. More at my Home Made Circuits. Simple Sample and Hold. Sample and Hold Standby. Opamp Supply Virtual Ground. Normally Closed AC SSR. Edison Bulb Life Extend. Simple High speed switch. BCD Thumbwheel to Analog. 0-1V to 4-20 mA.

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Schematics of delabs: DC-DC SSR Solid State Relay

http://schematics.dapj.com/2008/07/dc-dc-ssr-solid-state-relay.html

Electronic Circuit Diagrams and Design Ideas. Thursday, July 03, 2008. DC-DC SSR Solid State Relay. This is a DC Input DC Output SSR Solid State Relay. It was made for Printing or Photo Processing Equipment. It has an optical isolation and can be used for inductive loads. DC Load DC Control SSR. Simple Sample and Hold. Sample and Hold Standby. Opamp Supply Virtual Ground. Normally Closed AC SSR. Edison Bulb Life Extend. Simple High speed switch. BCD Thumbwheel to Analog. V to F Converter ICL8038. This is...

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Soldermans Basic Electronics: Thermocouples and RTD Tables

http://solderman.dapj.com/2004/10/thermocouples-and-rtd.html

Tutorials, Circuits, Explanations, Theory, Fundamentals. Saturday, September 06, 2014. Thermocouples and RTD Tables. One customer wanted a special Pt-PtRh very high temperature sensor for molten aluminum. It was very difficult and costly to even arrive at a solution. So a non-contact infra-red sensor may save lot of time-money and even reduce risk of injury. For J, K, and T Thermocouple Read "Temperature" Room Temperature for mV shown applied to equipment, eg. Tables of Thermoelectric Voltages. DN Produc...