Tag Archives: LM358

Vending Machine Drop Sensor Circuit

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Microcontrollers come in all sorts and sizes, and it’s very tempting to use them everywhere. If you are in a plan to build your own Vending Machine, probably you need a microcontroller-compatible Drop Sensor circuit. In a commercial vending machine, its delivery chute uses a drop (vibration) sensor to detect… Read more »

The telephone pickup small amplifiers using LM358

This circuit is the telephone pickup small amplifiers for To expand the voice conversation louder. or intercepted phone call. It use pickup telephone and LM358 op-amp IC as preamplifier and LM386 out to speaker and use 9V battery Low power consumption. The working principle The complete circuit of the The… Read more »

One LED flasher by transistors-UJT-SCR-LM358

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This circuit is a simple circuit using only capacitor C1.Resistors R1 frequency generator to Q1.Which acts like a switch.then used Q2 to be the current increase. Operation of this circuit from capacitor C1 through R2 and LED1. Until the voltage drop at C1 increases,Q1 to the value that work. As… Read more »

Timer control 1-15 minutes by Triac 2N6075 and LM555-LM358

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Most timer circuits. Often used with electrical transformers containing low as 9V and 12V, and use of electrical control relays.but the 1-15 minute timer circuit.It uses a triac instead of electrical control.This can be used with a 220V power house it is not connected to the transformer. Make smaller and… Read more »

One LED flasher by transistors-UJT-SCR-LM358

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This circuit is a simple circuit using only capacitor C1.Resistors R1 frequency generator to Q1.Which acts like a switch.then used Q2 to be the current increase. Operation of this circuit from capacitor C1 through R2 and LED1. Until the voltage drop at C1 increases,Q1 to the value that work. As… Read more »

One LED flasher by transistors-UJT-SCR-LM358

Schematic Diagrams      Comments Off on One LED flasher by transistors-UJT-SCR-LM358

This circuit is a simple circuit using only capacitor C1.Resistors R1 frequency generator to Q1.Which acts like a switch.then used Q2 to be the current increase. Operation of this circuit from capacitor C1 through R2 and LED1. Until the voltage drop at C1 increases,Q1 to the value that work. As… Read more »