- 20 Megahertz crystal oscillator
- 2 7-20pf capacitor
- Black & red wires
- >7.2 volt battery
For use with a higher voltage supply, you will need to use a voltage
regulator to convert the higher voltage to 5v. Typically a 7805 is used. Look up
the datasheet by searching Google “7805 voltage regulator”.
If you don’t know how these materials work or what they look like, look it up
- Insert PIC on breadboard. Refer to pin diagram above for pin numbers. To
prevent confusion, orient the PIC so the dimple on top faces the same way as the
- Connect breadboard side strips - power to power (red strips), ground to
ground (black strips. Just like the bottom 2 wires below. Those strips are now
referred to as “power” & “ground”.
- Power to Pin 1 (Vpp) – red wire (connected via 47k Resistor in
- Power to Pin 11 (Vdd) – red wire
- Ground to Pin 12 (Vss) – black wire
- Power to Pin 32 (Vdd) – red wire
- Ground to Pin 31 (Vss) – black wire
- Crystal Oscillator to Pins 13 & 14 (OSC1, OSC2), the polarity doesn’t
matter. (polarity = which of the 2 wires goes in which hole).
- Capacitor into power & ground – make sure the polarity is correct according
to the datasheet for the capacitor. If not it could damage the circuit.
- Ground to battery ground (-) – black wire.
- Power (red) to battery power (+) – red wire. Or, solder that wire to a
switch & run another wire from the switch to battery power, so you can switch
the power on & off.
If using voltage regulator:
- raw battery power wire goes into voltage regulator input.
- breadboard ground strip goes to battery ground.
- voltage regulator output wire (+5 volts) goes to breadboard power strip.
- voltage regulator ground wire goes to breadboard ground strip.