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Hello Everybody , the goal of this instructables is to learn how to do a simple locker for your room, or anything which need to be safe.
I've made it on a non-soldering card but there is the PCB if you want to make it !
Here is the list of differents components that we will need:
- A Microchip microcontroller 16F88 (but all mid-range of microchip will be good)
- Some wires
- 2 LEDs (a green for granted access and a red for denied access, i'm using a pcb with 3 leds the third if when the keypad wait)
- A keypad 3x4 (I'm using an old one but you will find it in every electronics shop)
- 3 Pull-up resistor 47Kohms (needed to make a logical "low")
- 2 resistors for the Leds (221 ohm will be enough)
- A 9 V battery (with the connector) and a regulator MCP 1702 (from microchip)
- 4 capacitors 100µF 16V / 10µF 16V / 100nF / 100nF
- A way to program the 16f88 ( like http://www.instructables.com/id/All-pic-programmer/ or buy a pickit http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en010053 )
(The components like the 16F88 and the MCP 1702 can be obtained by asking samples from microchip)
OPTIONAL : A multimeter to test the circuit.
Other components if you want to had a sound when the code is wrong (like a buzzer)
So if you're ready , Let's Go !
I've made it on a non-soldering card but there is the PCB if you want to make it !
Here is the list of differents components that we will need:
- A Microchip microcontroller 16F88 (but all mid-range of microchip will be good)
- Some wires
- 2 LEDs (a green for granted access and a red for denied access, i'm using a pcb with 3 leds the third if when the keypad wait)
- A keypad 3x4 (I'm using an old one but you will find it in every electronics shop)
- 3 Pull-up resistor 47Kohms (needed to make a logical "low")
- 2 resistors for the Leds (221 ohm will be enough)
- A 9 V battery (with the connector) and a regulator MCP 1702 (from microchip)
- 4 capacitors 100µF 16V / 10µF 16V / 100nF / 100nF
- A way to program the 16f88 ( like http://www.instructables.com/id/All-pic-programmer/ or buy a pickit http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en010053 )
(The components like the 16F88 and the MCP 1702 can be obtained by asking samples from microchip)
OPTIONAL : A multimeter to test the circuit.
Other components if you want to had a sound when the code is wrong (like a buzzer)
So if you're ready , Let's Go !
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Signing UpStep 1The regulator parts
We need to build the regulator part which will power the microcontroller !
So take the following components :
- MCP 1702 Regulator
- The 4 capacitors (100nF, 100nF , 10µF 16V , 100µF 16V)
- Some little wires
- The male connector
- The battery connector
And finally the non-soldering board (or something similar)
------------------------------------------------------------------------------------------------------------
At first place the MCP on the board, like on the picture,
then put the 4 capacitors between the Vin and the Ground,the Vout and the ground following the schematics.
Now just put the +5V away with a wire, we will connect it to the microcontroller later.
So take the following components :
- MCP 1702 Regulator
- The 4 capacitors (100nF, 100nF , 10µF 16V , 100µF 16V)
- Some little wires
- The male connector
- The battery connector
And finally the non-soldering board (or something similar)
------------------------------------------------------------------------------------------------------------
At first place the MCP on the board, like on the picture,
then put the 4 capacitors between the Vin and the Ground,the Vout and the ground following the schematics.
Now just put the +5V away with a wire, we will connect it to the microcontroller later.
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