FreeCalypso > hg > fc-small-hw

diff mmtb1/schem+bom/vsrc/led_circuit.v @ 0:0f9bdd60ce50

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fc-small-hw separated from old freecalypso-schem repo
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 21 Oct 2019 00:53:38 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmtb1/schem+bom/vsrc/led_circuit.v	Mon Oct 21 00:53:38 2019 +0000
@@ -0,0 +1,17 @@
+/*
+ * This module captures the circuit for showing the state of a digital signal
+ * on a LED without loading that digital signal by driving the LED from VBAT
+ * and using a MOSFET to control it.
+ */
+
+module led_circuit (GND, VBAT, Signal);
+
+input GND, VBAT, Signal;
+
+wire R_to_LED, LED_to_Q;
+
+resistor R (VBAT, R_to_LED);
+diode led (.A(R_to_LED), .C(LED_to_Q));
+mosfet Q (.G(Signal), .S(GND), .D(LED_to_Q));
+
+endmodule